/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:15:21,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:15:21,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:15:21,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:15:21,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 19:15:21,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:15:21,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:15:21,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:15:21,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:15:21,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:15:21,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:15:21,862 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:15:21,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:15:21,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:15:21,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:15:21,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:15:21,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:15:21,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:15:21,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:15:21,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:15:21,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:15:21,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:15:21,863 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:15:21,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:15:21,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:15:21,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:15:21,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:15:21,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:15:21,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:15:21,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:15:21,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:15:21,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:15:21,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:15:21,865 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:15:21,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:15:21,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:15:22,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:15:22,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:15:22,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:15:22,116 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:15:22,118 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:15:22,119 INFO L432 ainManager$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 [2021-08-12 19:15:22,120 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl' [2021-08-12 19:15:22,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:15:22,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:15:22,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:15:22,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:15:22,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:15:22,165 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 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,171 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 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:15:22,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:15:22,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:15:22,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:15:22,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (1/1) ... [2021-08-12 19:15:22,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:15:22,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:15:22,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:15:22,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:15:22,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (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 [2021-08-12 19:15:22,269 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:15:22,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:15:22,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:15:22,269 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:15:22,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:15:22,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:15:22,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:15:22,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:15:22,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:15:22,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:15:22,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:15:22,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:15:22,271 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:15:22,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:15:22,541 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-12 19:15:22,543 INFO L202 PluginConnector]: Adding new model word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:15:22 BoogieIcfgContainer [2021-08-12 19:15:22,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:15:22,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:15:22,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:15:22,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:15:22,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:15:22" (1/2) ... [2021-08-12 19:15:22,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1ffd9 and model type word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:15:22, skipping insertion in model container [2021-08-12 19:15:22,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:15:22" (2/2) ... [2021-08-12 19:15:22,547 INFO L111 eAbstractionObserver]: Analyzing ICFG word-subst.wvr.bpl [2021-08-12 19:15:22,551 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:15:22,551 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:15:22,552 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:15:22,576 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 19:15:22,589 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 19:15:22,609 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:15:22,609 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:15:22,609 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:15:22,609 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:15:22,609 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:15:22,610 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:15:22,610 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:15:22,610 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:15:22,616 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-08-12 19:15:22,634 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) [2021-08-12 19:15:22,638 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) [2021-08-12 19:15:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:15:22,644 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:22,644 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:22,645 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash -200100504, now seen corresponding path program 1 times [2021-08-12 19:15:22,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:22,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885826036] [2021-08-12 19:15:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:22,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:22,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885826036] [2021-08-12 19:15:22,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885826036] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:22,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:22,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:22,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019289417] [2021-08-12 19:15:22,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:22,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:22,877 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) [2021-08-12 19:15:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:22,967 INFO L93 Difference]: Finished difference Result 175 states and 566 transitions. [2021-08-12 19:15:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:15:22,968 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 [2021-08-12 19:15:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:22,979 INFO L225 Difference]: With dead ends: 175 [2021-08-12 19:15:22,979 INFO L226 Difference]: Without dead ends: 108 [2021-08-12 19:15:22,983 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-12 19:15:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-12 19:15:23,027 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) [2021-08-12 19:15:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 353 transitions. [2021-08-12 19:15:23,036 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 353 transitions. Word has length 14 [2021-08-12 19:15:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:23,036 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 353 transitions. [2021-08-12 19:15:23,037 INFO L483 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) [2021-08-12 19:15:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 353 transitions. [2021-08-12 19:15:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:15:23,039 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:23,039 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:23,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:15:23,040 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:23,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1713787741, now seen corresponding path program 1 times [2021-08-12 19:15:23,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:23,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444336957] [2021-08-12 19:15:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:23,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:23,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444336957] [2021-08-12 19:15:23,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444336957] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:23,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:23,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:15:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123434914] [2021-08-12 19:15:23,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:15:23,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:23,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:15:23,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:23,156 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) [2021-08-12 19:15:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:23,301 INFO L93 Difference]: Finished difference Result 174 states and 506 transitions. [2021-08-12 19:15:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:23,301 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 [2021-08-12 19:15:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:23,304 INFO L225 Difference]: With dead ends: 174 [2021-08-12 19:15:23,304 INFO L226 Difference]: Without dead ends: 153 [2021-08-12 19:15:23,305 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:15:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-12 19:15:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-08-12 19:15:23,314 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) [2021-08-12 19:15:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 390 transitions. [2021-08-12 19:15:23,315 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 390 transitions. Word has length 15 [2021-08-12 19:15:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:23,316 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 390 transitions. [2021-08-12 19:15:23,316 INFO L483 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) [2021-08-12 19:15:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 390 transitions. [2021-08-12 19:15:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:15:23,317 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:23,317 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:23,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:15:23,317 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1520780803, now seen corresponding path program 2 times [2021-08-12 19:15:23,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:23,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690740522] [2021-08-12 19:15:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:23,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690740522] [2021-08-12 19:15:23,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690740522] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:23,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:23,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:15:23,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894728785] [2021-08-12 19:15:23,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:15:23,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:23,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:15:23,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:23,379 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) [2021-08-12 19:15:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:23,454 INFO L93 Difference]: Finished difference Result 181 states and 522 transitions. [2021-08-12 19:15:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:23,454 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 [2021-08-12 19:15:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:23,456 INFO L225 Difference]: With dead ends: 181 [2021-08-12 19:15:23,456 INFO L226 Difference]: Without dead ends: 160 [2021-08-12 19:15:23,456 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:15:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-12 19:15:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-08-12 19:15:23,461 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) [2021-08-12 19:15:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 410 transitions. [2021-08-12 19:15:23,462 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 410 transitions. Word has length 15 [2021-08-12 19:15:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:23,463 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 410 transitions. [2021-08-12 19:15:23,463 INFO L483 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) [2021-08-12 19:15:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 410 transitions. [2021-08-12 19:15:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:15:23,464 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:23,464 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:23,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:15:23,464 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:23,464 INFO L82 PathProgramCache]: Analyzing trace with hash 372369077, now seen corresponding path program 3 times [2021-08-12 19:15:23,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:23,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851108806] [2021-08-12 19:15:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:23,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:23,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851108806] [2021-08-12 19:15:23,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851108806] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:23,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:23,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:15:23,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015255606] [2021-08-12 19:15:23,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:15:23,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:15:23,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:23,545 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) [2021-08-12 19:15:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:23,660 INFO L93 Difference]: Finished difference Result 237 states and 659 transitions. [2021-08-12 19:15:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:23,660 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 [2021-08-12 19:15:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:23,662 INFO L225 Difference]: With dead ends: 237 [2021-08-12 19:15:23,662 INFO L226 Difference]: Without dead ends: 216 [2021-08-12 19:15:23,663 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:15:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-12 19:15:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 135. [2021-08-12 19:15:23,679 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) [2021-08-12 19:15:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 422 transitions. [2021-08-12 19:15:23,679 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 422 transitions. Word has length 15 [2021-08-12 19:15:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:23,680 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 422 transitions. [2021-08-12 19:15:23,680 INFO L483 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) [2021-08-12 19:15:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 422 transitions. [2021-08-12 19:15:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:15:23,683 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:23,683 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:23,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:15:23,683 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:23,684 INFO L82 PathProgramCache]: Analyzing trace with hash 384286855, now seen corresponding path program 4 times [2021-08-12 19:15:23,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:23,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819074674] [2021-08-12 19:15:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:23,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:23,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819074674] [2021-08-12 19:15:23,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819074674] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:23,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:23,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:15:23,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114124290] [2021-08-12 19:15:23,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:15:23,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:15:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:23,801 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) [2021-08-12 19:15:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:23,891 INFO L93 Difference]: Finished difference Result 196 states and 552 transitions. [2021-08-12 19:15:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:23,891 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 [2021-08-12 19:15:23,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:23,893 INFO L225 Difference]: With dead ends: 196 [2021-08-12 19:15:23,893 INFO L226 Difference]: Without dead ends: 171 [2021-08-12 19:15:23,893 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:15:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-12 19:15:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2021-08-12 19:15:23,897 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) [2021-08-12 19:15:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 420 transitions. [2021-08-12 19:15:23,898 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 420 transitions. Word has length 15 [2021-08-12 19:15:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:23,899 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 420 transitions. [2021-08-12 19:15:23,899 INFO L483 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) [2021-08-12 19:15:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 420 transitions. [2021-08-12 19:15:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:15:23,899 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:23,899 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:23,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 19:15:23,900 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1046340473, now seen corresponding path program 5 times [2021-08-12 19:15:23,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:23,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002335691] [2021-08-12 19:15:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:23,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:23,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002335691] [2021-08-12 19:15:23,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002335691] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:23,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:23,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:15:23,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931876675] [2021-08-12 19:15:23,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:15:23,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:23,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:15:23,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:23,983 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) [2021-08-12 19:15:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,075 INFO L93 Difference]: Finished difference Result 230 states and 640 transitions. [2021-08-12 19:15:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:24,075 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 [2021-08-12 19:15:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,077 INFO L225 Difference]: With dead ends: 230 [2021-08-12 19:15:24,077 INFO L226 Difference]: Without dead ends: 209 [2021-08-12 19:15:24,077 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:15:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-12 19:15:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 137. [2021-08-12 19:15:24,082 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) [2021-08-12 19:15:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 427 transitions. [2021-08-12 19:15:24,083 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 427 transitions. Word has length 15 [2021-08-12 19:15:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,083 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 427 transitions. [2021-08-12 19:15:24,083 INFO L483 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) [2021-08-12 19:15:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 427 transitions. [2021-08-12 19:15:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:15:24,084 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,084 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 19:15:24,084 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,084 INFO L82 PathProgramCache]: Analyzing trace with hash -964122021, now seen corresponding path program 6 times [2021-08-12 19:15:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135502395] [2021-08-12 19:15:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135502395] [2021-08-12 19:15:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135502395] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:15:24,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038136062] [2021-08-12 19:15:24,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:15:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:15:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:24,174 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) [2021-08-12 19:15:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,259 INFO L93 Difference]: Finished difference Result 197 states and 554 transitions. [2021-08-12 19:15:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:24,259 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 [2021-08-12 19:15:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,260 INFO L225 Difference]: With dead ends: 197 [2021-08-12 19:15:24,260 INFO L226 Difference]: Without dead ends: 172 [2021-08-12 19:15:24,261 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:15:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-12 19:15:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-08-12 19:15:24,265 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) [2021-08-12 19:15:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 425 transitions. [2021-08-12 19:15:24,266 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 425 transitions. Word has length 15 [2021-08-12 19:15:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,266 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 425 transitions. [2021-08-12 19:15:24,266 INFO L483 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) [2021-08-12 19:15:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 425 transitions. [2021-08-12 19:15:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:15:24,267 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,267 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 19:15:24,267 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1568921575, now seen corresponding path program 1 times [2021-08-12 19:15:24,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643827652] [2021-08-12 19:15:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643827652] [2021-08-12 19:15:24,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643827652] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:24,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196636424] [2021-08-12 19:15:24,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:24,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:24,283 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) [2021-08-12 19:15:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,324 INFO L93 Difference]: Finished difference Result 241 states and 708 transitions. [2021-08-12 19:15:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:24,325 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 [2021-08-12 19:15:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,326 INFO L225 Difference]: With dead ends: 241 [2021-08-12 19:15:24,326 INFO L226 Difference]: Without dead ends: 203 [2021-08-12 19:15:24,326 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-12 19:15:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 136. [2021-08-12 19:15:24,331 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) [2021-08-12 19:15:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 421 transitions. [2021-08-12 19:15:24,331 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 421 transitions. Word has length 16 [2021-08-12 19:15:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,332 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 421 transitions. [2021-08-12 19:15:24,332 INFO L483 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) [2021-08-12 19:15:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 421 transitions. [2021-08-12 19:15:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:15:24,332 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,333 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 19:15:24,333 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1557107456, now seen corresponding path program 1 times [2021-08-12 19:15:24,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480425454] [2021-08-12 19:15:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480425454] [2021-08-12 19:15:24,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480425454] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:24,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775087399] [2021-08-12 19:15:24,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:24,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:24,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:24,349 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) [2021-08-12 19:15:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,382 INFO L93 Difference]: Finished difference Result 232 states and 656 transitions. [2021-08-12 19:15:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:24,383 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 [2021-08-12 19:15:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,384 INFO L225 Difference]: With dead ends: 232 [2021-08-12 19:15:24,384 INFO L226 Difference]: Without dead ends: 171 [2021-08-12 19:15:24,384 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-12 19:15:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2021-08-12 19:15:24,388 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) [2021-08-12 19:15:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 408 transitions. [2021-08-12 19:15:24,389 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 408 transitions. Word has length 16 [2021-08-12 19:15:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,389 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 408 transitions. [2021-08-12 19:15:24,389 INFO L483 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) [2021-08-12 19:15:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 408 transitions. [2021-08-12 19:15:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:15:24,390 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,390 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-12 19:15:24,390 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1420564495, now seen corresponding path program 2 times [2021-08-12 19:15:24,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265368879] [2021-08-12 19:15:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265368879] [2021-08-12 19:15:24,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265368879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:24,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959419539] [2021-08-12 19:15:24,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:24,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:24,404 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) [2021-08-12 19:15:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,437 INFO L93 Difference]: Finished difference Result 234 states and 646 transitions. [2021-08-12 19:15:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:24,437 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 [2021-08-12 19:15:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,438 INFO L225 Difference]: With dead ends: 234 [2021-08-12 19:15:24,438 INFO L226 Difference]: Without dead ends: 205 [2021-08-12 19:15:24,439 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-12 19:15:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 114. [2021-08-12 19:15:24,443 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) [2021-08-12 19:15:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 330 transitions. [2021-08-12 19:15:24,443 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 330 transitions. Word has length 16 [2021-08-12 19:15:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,444 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 330 transitions. [2021-08-12 19:15:24,444 INFO L483 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) [2021-08-12 19:15:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 330 transitions. [2021-08-12 19:15:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:15:24,444 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,444 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 19:15:24,444 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1521275701, now seen corresponding path program 3 times [2021-08-12 19:15:24,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373531019] [2021-08-12 19:15:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373531019] [2021-08-12 19:15:24,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373531019] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:24,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017234075] [2021-08-12 19:15:24,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:24,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:24,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:24,458 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) [2021-08-12 19:15:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,487 INFO L93 Difference]: Finished difference Result 200 states and 532 transitions. [2021-08-12 19:15:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:15:24,487 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 [2021-08-12 19:15:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,488 INFO L225 Difference]: With dead ends: 200 [2021-08-12 19:15:24,488 INFO L226 Difference]: Without dead ends: 165 [2021-08-12 19:15:24,488 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-12 19:15:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2021-08-12 19:15:24,492 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) [2021-08-12 19:15:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 317 transitions. [2021-08-12 19:15:24,493 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 317 transitions. Word has length 16 [2021-08-12 19:15:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,493 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 317 transitions. [2021-08-12 19:15:24,493 INFO L483 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) [2021-08-12 19:15:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 317 transitions. [2021-08-12 19:15:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:15:24,493 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,493 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-12 19:15:24,494 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1372165464, now seen corresponding path program 2 times [2021-08-12 19:15:24,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232966954] [2021-08-12 19:15:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232966954] [2021-08-12 19:15:24,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232966954] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:24,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314438451] [2021-08-12 19:15:24,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:24,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:24,506 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) [2021-08-12 19:15:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,534 INFO L93 Difference]: Finished difference Result 209 states and 560 transitions. [2021-08-12 19:15:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:15:24,534 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 [2021-08-12 19:15:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,535 INFO L225 Difference]: With dead ends: 209 [2021-08-12 19:15:24,535 INFO L226 Difference]: Without dead ends: 164 [2021-08-12 19:15:24,536 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-12 19:15:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 114. [2021-08-12 19:15:24,540 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) [2021-08-12 19:15:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-08-12 19:15:24,540 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 16 [2021-08-12 19:15:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,540 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-08-12 19:15:24,540 INFO L483 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) [2021-08-12 19:15:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-08-12 19:15:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:15:24,541 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,541 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-12 19:15:24,541 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash -507426732, now seen corresponding path program 3 times [2021-08-12 19:15:24,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137401968] [2021-08-12 19:15:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137401968] [2021-08-12 19:15:24,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137401968] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:24,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458199941] [2021-08-12 19:15:24,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:24,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:24,555 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) [2021-08-12 19:15:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,579 INFO L93 Difference]: Finished difference Result 186 states and 491 transitions. [2021-08-12 19:15:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:15:24,580 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 [2021-08-12 19:15:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,581 INFO L225 Difference]: With dead ends: 186 [2021-08-12 19:15:24,581 INFO L226 Difference]: Without dead ends: 146 [2021-08-12 19:15:24,581 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-12 19:15:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-08-12 19:15:24,585 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) [2021-08-12 19:15:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 315 transitions. [2021-08-12 19:15:24,586 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 315 transitions. Word has length 16 [2021-08-12 19:15:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,586 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 315 transitions. [2021-08-12 19:15:24,586 INFO L483 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) [2021-08-12 19:15:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 315 transitions. [2021-08-12 19:15:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:15:24,586 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,586 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-12 19:15:24,586 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1294148210, now seen corresponding path program 4 times [2021-08-12 19:15:24,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322777238] [2021-08-12 19:15:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322777238] [2021-08-12 19:15:24,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322777238] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109734720] [2021-08-12 19:15:24,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:24,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:24,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:24,623 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) [2021-08-12 19:15:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,673 INFO L93 Difference]: Finished difference Result 181 states and 480 transitions. [2021-08-12 19:15:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:15:24,673 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 [2021-08-12 19:15:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,674 INFO L225 Difference]: With dead ends: 181 [2021-08-12 19:15:24,674 INFO L226 Difference]: Without dead ends: 145 [2021-08-12 19:15:24,675 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:15:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-12 19:15:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2021-08-12 19:15:24,680 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) [2021-08-12 19:15:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 312 transitions. [2021-08-12 19:15:24,681 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 312 transitions. Word has length 16 [2021-08-12 19:15:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,681 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 312 transitions. [2021-08-12 19:15:24,681 INFO L483 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) [2021-08-12 19:15:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 312 transitions. [2021-08-12 19:15:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:15:24,682 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,682 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-12 19:15:24,682 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1904685263, now seen corresponding path program 4 times [2021-08-12 19:15:24,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215938543] [2021-08-12 19:15:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215938543] [2021-08-12 19:15:24,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215938543] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:15:24,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810012209] [2021-08-12 19:15:24,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:15:24,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:15:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:15:24,722 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) [2021-08-12 19:15:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,743 INFO L93 Difference]: Finished difference Result 145 states and 393 transitions. [2021-08-12 19:15:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:15:24,743 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 [2021-08-12 19:15:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,744 INFO L225 Difference]: With dead ends: 145 [2021-08-12 19:15:24,744 INFO L226 Difference]: Without dead ends: 108 [2021-08-12 19:15:24,744 INFO L806 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 [2021-08-12 19:15:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-12 19:15:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-12 19:15:24,748 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) [2021-08-12 19:15:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-08-12 19:15:24,748 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-08-12 19:15:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,749 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-08-12 19:15:24,749 INFO L483 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) [2021-08-12 19:15:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-08-12 19:15:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:24,749 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,749 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-12 19:15:24,749 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1361223606, now seen corresponding path program 1 times [2021-08-12 19:15:24,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418491483] [2021-08-12 19:15:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:24,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:24,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418491483] [2021-08-12 19:15:24,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418491483] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:24,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:24,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:24,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042615151] [2021-08-12 19:15:24,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:24,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:24,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:24,817 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) [2021-08-12 19:15:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:24,969 INFO L93 Difference]: Finished difference Result 267 states and 723 transitions. [2021-08-12 19:15:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:24,970 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 [2021-08-12 19:15:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:24,971 INFO L225 Difference]: With dead ends: 267 [2021-08-12 19:15:24,971 INFO L226 Difference]: Without dead ends: 250 [2021-08-12 19:15:24,971 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-12 19:15:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 141. [2021-08-12 19:15:24,977 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) [2021-08-12 19:15:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 391 transitions. [2021-08-12 19:15:24,978 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 391 transitions. Word has length 17 [2021-08-12 19:15:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:24,978 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 391 transitions. [2021-08-12 19:15:24,978 INFO L483 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) [2021-08-12 19:15:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 391 transitions. [2021-08-12 19:15:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:24,979 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:24,979 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:24,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-12 19:15:24,979 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:24,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:24,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1726190618, now seen corresponding path program 2 times [2021-08-12 19:15:24,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:24,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930816452] [2021-08-12 19:15:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:25,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:25,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930816452] [2021-08-12 19:15:25,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930816452] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:25,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:25,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:25,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910213781] [2021-08-12 19:15:25,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:25,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:25,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:25,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:25,125 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) [2021-08-12 19:15:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:25,394 INFO L93 Difference]: Finished difference Result 300 states and 797 transitions. [2021-08-12 19:15:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:25,395 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 [2021-08-12 19:15:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:25,397 INFO L225 Difference]: With dead ends: 300 [2021-08-12 19:15:25,397 INFO L226 Difference]: Without dead ends: 283 [2021-08-12 19:15:25,398 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-08-12 19:15:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-08-12 19:15:25,407 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) [2021-08-12 19:15:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-08-12 19:15:25,408 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-08-12 19:15:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:25,408 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-08-12 19:15:25,409 INFO L483 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) [2021-08-12 19:15:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-08-12 19:15:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:25,409 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:25,409 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:25,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-12 19:15:25,410 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:25,410 INFO L82 PathProgramCache]: Analyzing trace with hash 870056290, now seen corresponding path program 3 times [2021-08-12 19:15:25,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:25,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240243215] [2021-08-12 19:15:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:25,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:25,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240243215] [2021-08-12 19:15:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240243215] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:25,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:25,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:25,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498076451] [2021-08-12 19:15:25,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:25,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:25,500 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) [2021-08-12 19:15:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:25,769 INFO L93 Difference]: Finished difference Result 283 states and 765 transitions. [2021-08-12 19:15:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:25,770 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 [2021-08-12 19:15:25,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:25,772 INFO L225 Difference]: With dead ends: 283 [2021-08-12 19:15:25,772 INFO L226 Difference]: Without dead ends: 266 [2021-08-12 19:15:25,773 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-08-12 19:15:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-08-12 19:15:25,787 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) [2021-08-12 19:15:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-08-12 19:15:25,788 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-08-12 19:15:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:25,789 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-08-12 19:15:25,789 INFO L483 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) [2021-08-12 19:15:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-08-12 19:15:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:25,790 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:25,790 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:25,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-12 19:15:25,790 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:25,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:25,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2059322360, now seen corresponding path program 4 times [2021-08-12 19:15:25,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:25,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95761463] [2021-08-12 19:15:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:25,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:25,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95761463] [2021-08-12 19:15:25,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95761463] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:25,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:25,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:25,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025540164] [2021-08-12 19:15:25,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:25,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:25,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:25,879 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) [2021-08-12 19:15:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:26,049 INFO L93 Difference]: Finished difference Result 291 states and 786 transitions. [2021-08-12 19:15:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:26,051 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 [2021-08-12 19:15:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:26,054 INFO L225 Difference]: With dead ends: 291 [2021-08-12 19:15:26,054 INFO L226 Difference]: Without dead ends: 274 [2021-08-12 19:15:26,054 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-08-12 19:15:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-08-12 19:15:26,066 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) [2021-08-12 19:15:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-08-12 19:15:26,067 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-08-12 19:15:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:26,068 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-08-12 19:15:26,068 INFO L483 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) [2021-08-12 19:15:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-08-12 19:15:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:26,068 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:26,069 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:26,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-12 19:15:26,069 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2033546876, now seen corresponding path program 5 times [2021-08-12 19:15:26,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:26,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208156813] [2021-08-12 19:15:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:26,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:26,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208156813] [2021-08-12 19:15:26,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208156813] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:26,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:26,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:26,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378639000] [2021-08-12 19:15:26,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:26,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:26,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:26,146 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) [2021-08-12 19:15:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:26,427 INFO L93 Difference]: Finished difference Result 324 states and 861 transitions. [2021-08-12 19:15:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:26,428 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 [2021-08-12 19:15:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:26,430 INFO L225 Difference]: With dead ends: 324 [2021-08-12 19:15:26,430 INFO L226 Difference]: Without dead ends: 307 [2021-08-12 19:15:26,430 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-12 19:15:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2021-08-12 19:15:26,443 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) [2021-08-12 19:15:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 456 transitions. [2021-08-12 19:15:26,444 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 456 transitions. Word has length 17 [2021-08-12 19:15:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:26,444 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 456 transitions. [2021-08-12 19:15:26,444 INFO L483 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) [2021-08-12 19:15:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 456 transitions. [2021-08-12 19:15:26,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:26,445 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:26,445 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:26,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-12 19:15:26,445 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:26,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:26,446 INFO L82 PathProgramCache]: Analyzing trace with hash 334826488, now seen corresponding path program 6 times [2021-08-12 19:15:26,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:26,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979664998] [2021-08-12 19:15:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:26,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:26,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979664998] [2021-08-12 19:15:26,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979664998] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:26,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:26,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:26,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463981113] [2021-08-12 19:15:26,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:26,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:26,520 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) [2021-08-12 19:15:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:26,715 INFO L93 Difference]: Finished difference Result 301 states and 816 transitions. [2021-08-12 19:15:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:26,716 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 [2021-08-12 19:15:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:26,717 INFO L225 Difference]: With dead ends: 301 [2021-08-12 19:15:26,717 INFO L226 Difference]: Without dead ends: 284 [2021-08-12 19:15:26,717 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-12 19:15:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 159. [2021-08-12 19:15:26,725 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) [2021-08-12 19:15:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-08-12 19:15:26,726 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-08-12 19:15:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:26,726 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-08-12 19:15:26,726 INFO L483 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) [2021-08-12 19:15:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-08-12 19:15:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:26,727 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:26,727 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:26,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-12 19:15:26,727 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:26,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2035892590, now seen corresponding path program 7 times [2021-08-12 19:15:26,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:26,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514969763] [2021-08-12 19:15:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:26,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:26,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514969763] [2021-08-12 19:15:26,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514969763] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:26,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:26,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:26,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947539969] [2021-08-12 19:15:26,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:26,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:26,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:26,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:26,801 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) [2021-08-12 19:15:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:27,003 INFO L93 Difference]: Finished difference Result 391 states and 1042 transitions. [2021-08-12 19:15:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:27,003 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 [2021-08-12 19:15:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:27,005 INFO L225 Difference]: With dead ends: 391 [2021-08-12 19:15:27,005 INFO L226 Difference]: Without dead ends: 374 [2021-08-12 19:15:27,005 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-08-12 19:15:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 166. [2021-08-12 19:15:27,014 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) [2021-08-12 19:15:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 470 transitions. [2021-08-12 19:15:27,014 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 470 transitions. Word has length 17 [2021-08-12 19:15:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:27,015 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 470 transitions. [2021-08-12 19:15:27,015 INFO L483 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) [2021-08-12 19:15:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 470 transitions. [2021-08-12 19:15:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:27,016 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:27,016 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:27,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-12 19:15:27,016 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:27,016 INFO L82 PathProgramCache]: Analyzing trace with hash -828339518, now seen corresponding path program 8 times [2021-08-12 19:15:27,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:27,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864648590] [2021-08-12 19:15:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:27,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:27,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864648590] [2021-08-12 19:15:27,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864648590] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:27,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:27,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:27,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725552161] [2021-08-12 19:15:27,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:27,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:27,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:27,087 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) [2021-08-12 19:15:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:27,339 INFO L93 Difference]: Finished difference Result 400 states and 1068 transitions. [2021-08-12 19:15:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:27,340 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 [2021-08-12 19:15:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:27,342 INFO L225 Difference]: With dead ends: 400 [2021-08-12 19:15:27,342 INFO L226 Difference]: Without dead ends: 383 [2021-08-12 19:15:27,342 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-12 19:15:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 169. [2021-08-12 19:15:27,351 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) [2021-08-12 19:15:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 484 transitions. [2021-08-12 19:15:27,352 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 484 transitions. Word has length 17 [2021-08-12 19:15:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:27,352 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 484 transitions. [2021-08-12 19:15:27,353 INFO L483 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) [2021-08-12 19:15:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 484 transitions. [2021-08-12 19:15:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:27,353 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:27,353 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:27,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-12 19:15:27,353 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1767907390, now seen corresponding path program 9 times [2021-08-12 19:15:27,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:27,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330875530] [2021-08-12 19:15:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:27,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:27,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330875530] [2021-08-12 19:15:27,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330875530] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:27,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:27,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:27,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206053330] [2021-08-12 19:15:27,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:27,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:27,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:27,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:27,418 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) [2021-08-12 19:15:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:27,720 INFO L93 Difference]: Finished difference Result 407 states and 1084 transitions. [2021-08-12 19:15:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:27,720 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 [2021-08-12 19:15:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:27,722 INFO L225 Difference]: With dead ends: 407 [2021-08-12 19:15:27,722 INFO L226 Difference]: Without dead ends: 390 [2021-08-12 19:15:27,722 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-12 19:15:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 161. [2021-08-12 19:15:27,734 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) [2021-08-12 19:15:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 452 transitions. [2021-08-12 19:15:27,735 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 452 transitions. Word has length 17 [2021-08-12 19:15:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:27,736 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 452 transitions. [2021-08-12 19:15:27,736 INFO L483 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) [2021-08-12 19:15:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 452 transitions. [2021-08-12 19:15:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:27,736 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:27,736 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:27,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-12 19:15:27,736 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:27,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1043349262, now seen corresponding path program 10 times [2021-08-12 19:15:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:27,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858973043] [2021-08-12 19:15:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:27,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:27,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858973043] [2021-08-12 19:15:27,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858973043] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:27,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:27,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:27,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760736614] [2021-08-12 19:15:27,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:27,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:27,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:27,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:27,800 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) [2021-08-12 19:15:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:27,990 INFO L93 Difference]: Finished difference Result 342 states and 920 transitions. [2021-08-12 19:15:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:27,990 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 [2021-08-12 19:15:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:27,993 INFO L225 Difference]: With dead ends: 342 [2021-08-12 19:15:27,993 INFO L226 Difference]: Without dead ends: 325 [2021-08-12 19:15:27,993 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-12 19:15:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 165. [2021-08-12 19:15:28,010 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) [2021-08-12 19:15:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 466 transitions. [2021-08-12 19:15:28,012 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 466 transitions. Word has length 17 [2021-08-12 19:15:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:28,012 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 466 transitions. [2021-08-12 19:15:28,012 INFO L483 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) [2021-08-12 19:15:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 466 transitions. [2021-08-12 19:15:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:28,013 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:28,013 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:28,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-12 19:15:28,013 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:28,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1480345592, now seen corresponding path program 11 times [2021-08-12 19:15:28,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:28,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249902385] [2021-08-12 19:15:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:28,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:28,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249902385] [2021-08-12 19:15:28,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249902385] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:28,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:28,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:28,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389618977] [2021-08-12 19:15:28,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:28,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:28,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:28,079 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) [2021-08-12 19:15:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:28,352 INFO L93 Difference]: Finished difference Result 337 states and 911 transitions. [2021-08-12 19:15:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:28,353 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 [2021-08-12 19:15:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:28,355 INFO L225 Difference]: With dead ends: 337 [2021-08-12 19:15:28,356 INFO L226 Difference]: Without dead ends: 320 [2021-08-12 19:15:28,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-12 19:15:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2021-08-12 19:15:28,375 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) [2021-08-12 19:15:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-08-12 19:15:28,377 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-08-12 19:15:28,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:28,377 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-08-12 19:15:28,377 INFO L483 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) [2021-08-12 19:15:28,377 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-08-12 19:15:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:28,378 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:28,378 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:28,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-12 19:15:28,378 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:28,378 INFO L82 PathProgramCache]: Analyzing trace with hash -145439044, now seen corresponding path program 12 times [2021-08-12 19:15:28,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:28,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332611056] [2021-08-12 19:15:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:28,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332611056] [2021-08-12 19:15:28,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332611056] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:28,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:28,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:28,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520843305] [2021-08-12 19:15:28,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:28,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:28,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:28,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:28,437 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) [2021-08-12 19:15:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:28,640 INFO L93 Difference]: Finished difference Result 320 states and 881 transitions. [2021-08-12 19:15:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:28,640 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 [2021-08-12 19:15:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:28,642 INFO L225 Difference]: With dead ends: 320 [2021-08-12 19:15:28,642 INFO L226 Difference]: Without dead ends: 303 [2021-08-12 19:15:28,642 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-12 19:15:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 171. [2021-08-12 19:15:28,654 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) [2021-08-12 19:15:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-08-12 19:15:28,655 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-08-12 19:15:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:28,655 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-08-12 19:15:28,655 INFO L483 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) [2021-08-12 19:15:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-08-12 19:15:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:28,655 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:28,655 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:28,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-12 19:15:28,656 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash 161256120, now seen corresponding path program 13 times [2021-08-12 19:15:28,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:28,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664675002] [2021-08-12 19:15:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:28,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:28,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664675002] [2021-08-12 19:15:28,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664675002] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:28,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:28,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:28,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441192959] [2021-08-12 19:15:28,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:28,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:28,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:28,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:28,699 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) [2021-08-12 19:15:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:28,909 INFO L93 Difference]: Finished difference Result 387 states and 1048 transitions. [2021-08-12 19:15:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:28,909 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 [2021-08-12 19:15:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:28,911 INFO L225 Difference]: With dead ends: 387 [2021-08-12 19:15:28,911 INFO L226 Difference]: Without dead ends: 370 [2021-08-12 19:15:28,911 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-12 19:15:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 174. [2021-08-12 19:15:28,923 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) [2021-08-12 19:15:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-08-12 19:15:28,924 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-08-12 19:15:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:28,925 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-08-12 19:15:28,925 INFO L483 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) [2021-08-12 19:15:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-08-12 19:15:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:28,925 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:28,925 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:28,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-12 19:15:28,925 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1057379240, now seen corresponding path program 14 times [2021-08-12 19:15:28,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:28,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244313476] [2021-08-12 19:15:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:28,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:28,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244313476] [2021-08-12 19:15:28,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244313476] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:28,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:28,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:28,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086533575] [2021-08-12 19:15:28,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:28,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:28,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:28,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:28,972 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) [2021-08-12 19:15:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:29,183 INFO L93 Difference]: Finished difference Result 385 states and 1041 transitions. [2021-08-12 19:15:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:29,183 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 [2021-08-12 19:15:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:29,185 INFO L225 Difference]: With dead ends: 385 [2021-08-12 19:15:29,185 INFO L226 Difference]: Without dead ends: 368 [2021-08-12 19:15:29,185 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-12 19:15:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 174. [2021-08-12 19:15:29,198 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) [2021-08-12 19:15:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-08-12 19:15:29,199 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-08-12 19:15:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:29,199 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-08-12 19:15:29,199 INFO L483 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) [2021-08-12 19:15:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-08-12 19:15:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:29,200 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:29,200 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:29,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-12 19:15:29,200 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:29,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1150316668, now seen corresponding path program 15 times [2021-08-12 19:15:29,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:29,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201536298] [2021-08-12 19:15:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:29,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:29,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201536298] [2021-08-12 19:15:29,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201536298] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:29,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:29,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:29,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823142687] [2021-08-12 19:15:29,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:29,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:29,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:29,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:29,272 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) [2021-08-12 19:15:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:29,524 INFO L93 Difference]: Finished difference Result 394 states and 1057 transitions. [2021-08-12 19:15:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:29,524 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 [2021-08-12 19:15:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:29,526 INFO L225 Difference]: With dead ends: 394 [2021-08-12 19:15:29,526 INFO L226 Difference]: Without dead ends: 377 [2021-08-12 19:15:29,526 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-12 19:15:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 177. [2021-08-12 19:15:29,540 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) [2021-08-12 19:15:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-08-12 19:15:29,541 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-08-12 19:15:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:29,541 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-08-12 19:15:29,541 INFO L483 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) [2021-08-12 19:15:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-08-12 19:15:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:29,542 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:29,542 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:29,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-12 19:15:29,542 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash -19872328, now seen corresponding path program 16 times [2021-08-12 19:15:29,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:29,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034381237] [2021-08-12 19:15:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:29,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:29,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034381237] [2021-08-12 19:15:29,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034381237] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:29,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:29,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:29,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512671010] [2021-08-12 19:15:29,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:29,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:29,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:29,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:29,598 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) [2021-08-12 19:15:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:29,888 INFO L93 Difference]: Finished difference Result 378 states and 1034 transitions. [2021-08-12 19:15:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:29,889 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 [2021-08-12 19:15:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:29,892 INFO L225 Difference]: With dead ends: 378 [2021-08-12 19:15:29,892 INFO L226 Difference]: Without dead ends: 361 [2021-08-12 19:15:29,892 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-08-12 19:15:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 174. [2021-08-12 19:15:29,909 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) [2021-08-12 19:15:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-08-12 19:15:29,910 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-08-12 19:15:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:29,911 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-08-12 19:15:29,911 INFO L483 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) [2021-08-12 19:15:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-08-12 19:15:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:29,911 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:29,911 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:29,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-12 19:15:29,912 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash -36809380, now seen corresponding path program 17 times [2021-08-12 19:15:29,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:29,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119739511] [2021-08-12 19:15:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:29,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:29,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119739511] [2021-08-12 19:15:29,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119739511] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:29,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:29,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:29,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987344400] [2021-08-12 19:15:29,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:29,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:29,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:29,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:29,976 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) [2021-08-12 19:15:30,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:30,212 INFO L93 Difference]: Finished difference Result 366 states and 993 transitions. [2021-08-12 19:15:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:30,213 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 [2021-08-12 19:15:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:30,214 INFO L225 Difference]: With dead ends: 366 [2021-08-12 19:15:30,215 INFO L226 Difference]: Without dead ends: 349 [2021-08-12 19:15:30,215 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-12 19:15:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 176. [2021-08-12 19:15:30,230 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) [2021-08-12 19:15:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-08-12 19:15:30,231 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-08-12 19:15:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:30,232 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-08-12 19:15:30,232 INFO L483 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) [2021-08-12 19:15:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-08-12 19:15:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:30,232 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:30,232 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:30,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-12 19:15:30,232 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1103474456, now seen corresponding path program 18 times [2021-08-12 19:15:30,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:30,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005745932] [2021-08-12 19:15:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:30,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:30,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005745932] [2021-08-12 19:15:30,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005745932] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:30,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:30,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:30,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34227307] [2021-08-12 19:15:30,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:30,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:30,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:30,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:30,277 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) [2021-08-12 19:15:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:30,516 INFO L93 Difference]: Finished difference Result 345 states and 955 transitions. [2021-08-12 19:15:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:30,516 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 [2021-08-12 19:15:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:30,518 INFO L225 Difference]: With dead ends: 345 [2021-08-12 19:15:30,518 INFO L226 Difference]: Without dead ends: 328 [2021-08-12 19:15:30,518 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-08-12 19:15:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 174. [2021-08-12 19:15:30,534 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) [2021-08-12 19:15:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-08-12 19:15:30,535 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-08-12 19:15:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:30,536 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-08-12 19:15:30,536 INFO L483 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) [2021-08-12 19:15:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-08-12 19:15:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:30,536 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:30,536 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:30,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-12 19:15:30,536 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1622951230, now seen corresponding path program 19 times [2021-08-12 19:15:30,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:30,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558766266] [2021-08-12 19:15:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:30,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:30,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558766266] [2021-08-12 19:15:30,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558766266] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:30,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:30,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:30,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457364078] [2021-08-12 19:15:30,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:30,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:30,580 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) [2021-08-12 19:15:30,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:30,773 INFO L93 Difference]: Finished difference Result 362 states and 985 transitions. [2021-08-12 19:15:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:30,774 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 [2021-08-12 19:15:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:30,775 INFO L225 Difference]: With dead ends: 362 [2021-08-12 19:15:30,776 INFO L226 Difference]: Without dead ends: 345 [2021-08-12 19:15:30,776 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-12 19:15:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 177. [2021-08-12 19:15:30,793 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) [2021-08-12 19:15:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-08-12 19:15:30,794 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-08-12 19:15:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:30,794 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-08-12 19:15:30,794 INFO L483 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) [2021-08-12 19:15:30,794 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-08-12 19:15:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:30,794 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:30,795 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:30,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-12 19:15:30,795 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1422092646, now seen corresponding path program 20 times [2021-08-12 19:15:30,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:30,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312812403] [2021-08-12 19:15:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:30,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:30,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312812403] [2021-08-12 19:15:30,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312812403] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:30,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:30,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:30,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948857662] [2021-08-12 19:15:30,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:30,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:30,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:30,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:30,847 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) [2021-08-12 19:15:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:31,113 INFO L93 Difference]: Finished difference Result 379 states and 1019 transitions. [2021-08-12 19:15:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:31,113 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 [2021-08-12 19:15:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:31,115 INFO L225 Difference]: With dead ends: 379 [2021-08-12 19:15:31,115 INFO L226 Difference]: Without dead ends: 362 [2021-08-12 19:15:31,115 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-12 19:15:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 179. [2021-08-12 19:15:31,133 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) [2021-08-12 19:15:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-08-12 19:15:31,134 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 17 [2021-08-12 19:15:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:31,134 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-08-12 19:15:31,134 INFO L483 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) [2021-08-12 19:15:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-08-12 19:15:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:31,135 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:31,135 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:31,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-12 19:15:31,135 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:31,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:31,135 INFO L82 PathProgramCache]: Analyzing trace with hash 203457286, now seen corresponding path program 21 times [2021-08-12 19:15:31,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:31,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174635021] [2021-08-12 19:15:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:31,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:31,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174635021] [2021-08-12 19:15:31,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174635021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:31,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:31,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:31,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701153970] [2021-08-12 19:15:31,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:31,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:31,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:31,192 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) [2021-08-12 19:15:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:31,432 INFO L93 Difference]: Finished difference Result 356 states and 974 transitions. [2021-08-12 19:15:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:31,432 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 [2021-08-12 19:15:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:31,434 INFO L225 Difference]: With dead ends: 356 [2021-08-12 19:15:31,434 INFO L226 Difference]: Without dead ends: 339 [2021-08-12 19:15:31,434 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-12 19:15:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 177. [2021-08-12 19:15:31,453 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) [2021-08-12 19:15:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-08-12 19:15:31,453 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-08-12 19:15:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:31,453 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-08-12 19:15:31,454 INFO L483 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) [2021-08-12 19:15:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-08-12 19:15:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:31,454 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:31,454 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:31,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-12 19:15:31,454 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1026845314, now seen corresponding path program 22 times [2021-08-12 19:15:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:31,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811733201] [2021-08-12 19:15:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:31,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:31,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811733201] [2021-08-12 19:15:31,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811733201] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:31,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:31,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:31,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135584028] [2021-08-12 19:15:31,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:31,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:31,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:31,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:31,507 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) [2021-08-12 19:15:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:31,813 INFO L93 Difference]: Finished difference Result 411 states and 1108 transitions. [2021-08-12 19:15:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:31,814 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 [2021-08-12 19:15:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:31,816 INFO L225 Difference]: With dead ends: 411 [2021-08-12 19:15:31,816 INFO L226 Difference]: Without dead ends: 394 [2021-08-12 19:15:31,816 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-12 19:15:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 180. [2021-08-12 19:15:31,835 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) [2021-08-12 19:15:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 521 transitions. [2021-08-12 19:15:31,836 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 521 transitions. Word has length 17 [2021-08-12 19:15:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:31,836 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 521 transitions. [2021-08-12 19:15:31,836 INFO L483 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) [2021-08-12 19:15:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 521 transitions. [2021-08-12 19:15:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:31,836 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:31,837 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:31,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-12 19:15:31,837 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:31,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:31,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1848016830, now seen corresponding path program 23 times [2021-08-12 19:15:31,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:31,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364924172] [2021-08-12 19:15:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:31,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:31,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364924172] [2021-08-12 19:15:31,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364924172] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:31,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:31,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:31,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005938844] [2021-08-12 19:15:31,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:31,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:31,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:31,890 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) [2021-08-12 19:15:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:32,229 INFO L93 Difference]: Finished difference Result 409 states and 1112 transitions. [2021-08-12 19:15:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:32,230 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 [2021-08-12 19:15:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:32,231 INFO L225 Difference]: With dead ends: 409 [2021-08-12 19:15:32,231 INFO L226 Difference]: Without dead ends: 392 [2021-08-12 19:15:32,232 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-12 19:15:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 183. [2021-08-12 19:15:32,252 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) [2021-08-12 19:15:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 535 transitions. [2021-08-12 19:15:32,252 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 535 transitions. Word has length 17 [2021-08-12 19:15:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:32,253 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 535 transitions. [2021-08-12 19:15:32,253 INFO L483 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) [2021-08-12 19:15:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 535 transitions. [2021-08-12 19:15:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:32,253 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:32,253 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:32,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-12 19:15:32,253 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:32,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:32,254 INFO L82 PathProgramCache]: Analyzing trace with hash 748230078, now seen corresponding path program 24 times [2021-08-12 19:15:32,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:32,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255015216] [2021-08-12 19:15:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:32,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:32,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255015216] [2021-08-12 19:15:32,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255015216] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:32,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:32,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:32,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25227093] [2021-08-12 19:15:32,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:32,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:32,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:32,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:32,312 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) [2021-08-12 19:15:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:32,776 INFO L93 Difference]: Finished difference Result 386 states and 1067 transitions. [2021-08-12 19:15:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:32,776 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 [2021-08-12 19:15:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:32,779 INFO L225 Difference]: With dead ends: 386 [2021-08-12 19:15:32,779 INFO L226 Difference]: Without dead ends: 369 [2021-08-12 19:15:32,779 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-12 19:15:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-08-12 19:15:32,808 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) [2021-08-12 19:15:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-08-12 19:15:32,808 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-08-12 19:15:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:32,809 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-08-12 19:15:32,809 INFO L483 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) [2021-08-12 19:15:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-08-12 19:15:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:32,809 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:32,809 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:32,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-12 19:15:32,809 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:32,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:32,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1951172510, now seen corresponding path program 25 times [2021-08-12 19:15:32,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:32,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996633775] [2021-08-12 19:15:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:32,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:32,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996633775] [2021-08-12 19:15:32,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996633775] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:32,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:32,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:32,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23279336] [2021-08-12 19:15:32,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:32,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:32,853 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) [2021-08-12 19:15:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:33,177 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2021-08-12 19:15:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:33,178 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 [2021-08-12 19:15:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:33,179 INFO L225 Difference]: With dead ends: 405 [2021-08-12 19:15:33,179 INFO L226 Difference]: Without dead ends: 388 [2021-08-12 19:15:33,180 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-12 19:15:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 180. [2021-08-12 19:15:33,201 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) [2021-08-12 19:15:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-08-12 19:15:33,202 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-08-12 19:15:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:33,202 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-08-12 19:15:33,202 INFO L483 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) [2021-08-12 19:15:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-08-12 19:15:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:33,202 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:33,202 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:33,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-12 19:15:33,203 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159426, now seen corresponding path program 26 times [2021-08-12 19:15:33,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:33,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41545543] [2021-08-12 19:15:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:33,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:33,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41545543] [2021-08-12 19:15:33,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41545543] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:33,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:33,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:33,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396585366] [2021-08-12 19:15:33,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:33,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:33,251 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) [2021-08-12 19:15:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:33,558 INFO L93 Difference]: Finished difference Result 403 states and 1098 transitions. [2021-08-12 19:15:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:33,558 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 [2021-08-12 19:15:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:33,560 INFO L225 Difference]: With dead ends: 403 [2021-08-12 19:15:33,560 INFO L226 Difference]: Without dead ends: 386 [2021-08-12 19:15:33,560 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-12 19:15:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 178. [2021-08-12 19:15:33,582 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) [2021-08-12 19:15:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-08-12 19:15:33,583 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-08-12 19:15:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:33,583 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-08-12 19:15:33,583 INFO L483 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) [2021-08-12 19:15:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-08-12 19:15:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:33,583 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:33,584 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:33,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-12 19:15:33,584 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash -962111962, now seen corresponding path program 27 times [2021-08-12 19:15:33,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:33,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982538230] [2021-08-12 19:15:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:33,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:33,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982538230] [2021-08-12 19:15:33,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982538230] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:33,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:33,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:33,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376987840] [2021-08-12 19:15:33,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:33,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:33,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:33,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:33,632 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) [2021-08-12 19:15:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:33,971 INFO L93 Difference]: Finished difference Result 397 states and 1077 transitions. [2021-08-12 19:15:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:33,972 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 [2021-08-12 19:15:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:33,974 INFO L225 Difference]: With dead ends: 397 [2021-08-12 19:15:33,974 INFO L226 Difference]: Without dead ends: 380 [2021-08-12 19:15:33,974 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-08-12 19:15:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 181. [2021-08-12 19:15:33,997 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) [2021-08-12 19:15:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 530 transitions. [2021-08-12 19:15:33,998 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 530 transitions. Word has length 17 [2021-08-12 19:15:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:33,998 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 530 transitions. [2021-08-12 19:15:33,998 INFO L483 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) [2021-08-12 19:15:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 530 transitions. [2021-08-12 19:15:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:33,999 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:33,999 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:33,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-12 19:15:33,999 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2132300958, now seen corresponding path program 28 times [2021-08-12 19:15:34,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:34,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086664938] [2021-08-12 19:15:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:34,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086664938] [2021-08-12 19:15:34,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086664938] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:34,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:34,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:34,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615495624] [2021-08-12 19:15:34,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:34,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:34,050 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) [2021-08-12 19:15:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:34,385 INFO L93 Difference]: Finished difference Result 381 states and 1054 transitions. [2021-08-12 19:15:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:34,386 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 [2021-08-12 19:15:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:34,387 INFO L225 Difference]: With dead ends: 381 [2021-08-12 19:15:34,387 INFO L226 Difference]: Without dead ends: 364 [2021-08-12 19:15:34,388 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-12 19:15:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 178. [2021-08-12 19:15:34,411 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) [2021-08-12 19:15:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-08-12 19:15:34,412 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-08-12 19:15:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:34,412 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-08-12 19:15:34,412 INFO L483 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) [2021-08-12 19:15:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-08-12 19:15:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:34,412 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:34,412 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:34,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-12 19:15:34,413 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2145729286, now seen corresponding path program 29 times [2021-08-12 19:15:34,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:34,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285603150] [2021-08-12 19:15:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:34,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285603150] [2021-08-12 19:15:34,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285603150] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:34,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:34,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:34,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752306899] [2021-08-12 19:15:34,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:34,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:34,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:34,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:34,458 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) [2021-08-12 19:15:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:34,760 INFO L93 Difference]: Finished difference Result 365 states and 1005 transitions. [2021-08-12 19:15:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:34,760 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 [2021-08-12 19:15:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:34,762 INFO L225 Difference]: With dead ends: 365 [2021-08-12 19:15:34,762 INFO L226 Difference]: Without dead ends: 348 [2021-08-12 19:15:34,762 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-12 19:15:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 180. [2021-08-12 19:15:34,798 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) [2021-08-12 19:15:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-08-12 19:15:34,799 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-08-12 19:15:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:34,799 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-08-12 19:15:34,799 INFO L483 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) [2021-08-12 19:15:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-08-12 19:15:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:34,799 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:34,799 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:34,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-12 19:15:34,799 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1008954174, now seen corresponding path program 30 times [2021-08-12 19:15:34,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:34,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476074316] [2021-08-12 19:15:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:34,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:34,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476074316] [2021-08-12 19:15:34,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476074316] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:34,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:34,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:34,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430262029] [2021-08-12 19:15:34,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:34,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:34,845 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) [2021-08-12 19:15:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:35,127 INFO L93 Difference]: Finished difference Result 344 states and 967 transitions. [2021-08-12 19:15:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:35,128 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 [2021-08-12 19:15:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:35,129 INFO L225 Difference]: With dead ends: 344 [2021-08-12 19:15:35,129 INFO L226 Difference]: Without dead ends: 327 [2021-08-12 19:15:35,130 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-08-12 19:15:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 177. [2021-08-12 19:15:35,154 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) [2021-08-12 19:15:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-08-12 19:15:35,155 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-08-12 19:15:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:35,155 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-08-12 19:15:35,155 INFO L483 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) [2021-08-12 19:15:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-08-12 19:15:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:35,156 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:35,156 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:35,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-12 19:15:35,156 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1057121422, now seen corresponding path program 31 times [2021-08-12 19:15:35,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:35,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992447970] [2021-08-12 19:15:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:35,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:35,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992447970] [2021-08-12 19:15:35,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992447970] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:35,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:35,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:35,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401585796] [2021-08-12 19:15:35,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:35,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:35,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:35,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:35,211 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) [2021-08-12 19:15:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:35,579 INFO L93 Difference]: Finished difference Result 379 states and 1038 transitions. [2021-08-12 19:15:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:35,579 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 [2021-08-12 19:15:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:35,581 INFO L225 Difference]: With dead ends: 379 [2021-08-12 19:15:35,581 INFO L226 Difference]: Without dead ends: 362 [2021-08-12 19:15:35,581 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-12 19:15:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 186. [2021-08-12 19:15:35,609 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) [2021-08-12 19:15:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-08-12 19:15:35,609 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-08-12 19:15:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:35,610 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-08-12 19:15:35,610 INFO L483 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) [2021-08-12 19:15:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-08-12 19:15:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:35,610 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:35,610 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:35,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-12 19:15:35,610 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2030292802, now seen corresponding path program 32 times [2021-08-12 19:15:35,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:35,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093590819] [2021-08-12 19:15:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:35,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:35,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093590819] [2021-08-12 19:15:35,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093590819] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:35,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:35,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:35,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910308913] [2021-08-12 19:15:35,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:35,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:35,665 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) [2021-08-12 19:15:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:36,040 INFO L93 Difference]: Finished difference Result 388 states and 1064 transitions. [2021-08-12 19:15:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:36,040 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 [2021-08-12 19:15:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:36,042 INFO L225 Difference]: With dead ends: 388 [2021-08-12 19:15:36,042 INFO L226 Difference]: Without dead ends: 371 [2021-08-12 19:15:36,042 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-12 19:15:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2021-08-12 19:15:36,071 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) [2021-08-12 19:15:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 560 transitions. [2021-08-12 19:15:36,072 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 560 transitions. Word has length 17 [2021-08-12 19:15:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:36,072 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 560 transitions. [2021-08-12 19:15:36,072 INFO L483 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) [2021-08-12 19:15:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 560 transitions. [2021-08-12 19:15:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:36,073 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:36,073 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:36,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-12 19:15:36,073 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 565954106, now seen corresponding path program 33 times [2021-08-12 19:15:36,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:36,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734000903] [2021-08-12 19:15:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:36,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:36,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734000903] [2021-08-12 19:15:36,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734000903] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:36,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:36,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:36,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203972663] [2021-08-12 19:15:36,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:36,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:36,140 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) [2021-08-12 19:15:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:36,542 INFO L93 Difference]: Finished difference Result 395 states and 1080 transitions. [2021-08-12 19:15:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:36,542 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 [2021-08-12 19:15:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:36,544 INFO L225 Difference]: With dead ends: 395 [2021-08-12 19:15:36,544 INFO L226 Difference]: Without dead ends: 378 [2021-08-12 19:15:36,545 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-08-12 19:15:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 181. [2021-08-12 19:15:36,573 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) [2021-08-12 19:15:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-08-12 19:15:36,574 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-08-12 19:15:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:36,574 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-08-12 19:15:36,574 INFO L483 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) [2021-08-12 19:15:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-08-12 19:15:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:36,575 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:36,575 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:36,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-12 19:15:36,575 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:36,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2049664750, now seen corresponding path program 34 times [2021-08-12 19:15:36,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:36,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566313658] [2021-08-12 19:15:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:36,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:36,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566313658] [2021-08-12 19:15:36,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566313658] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:36,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:36,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:36,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650855883] [2021-08-12 19:15:36,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:36,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:36,624 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) [2021-08-12 19:15:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:37,003 INFO L93 Difference]: Finished difference Result 440 states and 1186 transitions. [2021-08-12 19:15:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:37,004 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 [2021-08-12 19:15:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:37,005 INFO L225 Difference]: With dead ends: 440 [2021-08-12 19:15:37,006 INFO L226 Difference]: Without dead ends: 423 [2021-08-12 19:15:37,006 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-08-12 19:15:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 185. [2021-08-12 19:15:37,035 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) [2021-08-12 19:15:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2021-08-12 19:15:37,036 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 17 [2021-08-12 19:15:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:37,036 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2021-08-12 19:15:37,036 INFO L483 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) [2021-08-12 19:15:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2021-08-12 19:15:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:37,037 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:37,037 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:37,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-12 19:15:37,037 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:37,037 INFO L82 PathProgramCache]: Analyzing trace with hash 278392308, now seen corresponding path program 35 times [2021-08-12 19:15:37,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:37,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361015757] [2021-08-12 19:15:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:37,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:37,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361015757] [2021-08-12 19:15:37,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361015757] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:37,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:37,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:37,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969486790] [2021-08-12 19:15:37,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:37,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:37,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:37,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:37,083 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) [2021-08-12 19:15:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:37,541 INFO L93 Difference]: Finished difference Result 435 states and 1177 transitions. [2021-08-12 19:15:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:37,541 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 [2021-08-12 19:15:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:37,543 INFO L225 Difference]: With dead ends: 435 [2021-08-12 19:15:37,543 INFO L226 Difference]: Without dead ends: 418 [2021-08-12 19:15:37,544 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-12 19:15:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 187. [2021-08-12 19:15:37,576 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) [2021-08-12 19:15:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-08-12 19:15:37,577 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-08-12 19:15:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:37,577 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-08-12 19:15:37,577 INFO L483 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) [2021-08-12 19:15:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-08-12 19:15:37,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:37,578 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:37,578 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:37,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-08-12 19:15:37,578 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:37,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1347392328, now seen corresponding path program 36 times [2021-08-12 19:15:37,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:37,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977438499] [2021-08-12 19:15:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:37,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:37,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977438499] [2021-08-12 19:15:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977438499] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:37,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:37,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:37,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312774512] [2021-08-12 19:15:37,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:37,620 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) [2021-08-12 19:15:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:38,017 INFO L93 Difference]: Finished difference Result 418 states and 1147 transitions. [2021-08-12 19:15:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:38,018 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 [2021-08-12 19:15:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:38,020 INFO L225 Difference]: With dead ends: 418 [2021-08-12 19:15:38,020 INFO L226 Difference]: Without dead ends: 401 [2021-08-12 19:15:38,020 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-12 19:15:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 181. [2021-08-12 19:15:38,065 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) [2021-08-12 19:15:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-08-12 19:15:38,066 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-08-12 19:15:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:38,066 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-08-12 19:15:38,066 INFO L483 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) [2021-08-12 19:15:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-08-12 19:15:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:38,072 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:38,072 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:38,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-08-12 19:15:38,072 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1040697164, now seen corresponding path program 37 times [2021-08-12 19:15:38,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:38,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487951696] [2021-08-12 19:15:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:38,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487951696] [2021-08-12 19:15:38,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487951696] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:38,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:38,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:38,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129029571] [2021-08-12 19:15:38,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:38,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:38,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:38,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:38,149 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) [2021-08-12 19:15:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:38,638 INFO L93 Difference]: Finished difference Result 439 states and 1203 transitions. [2021-08-12 19:15:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:38,639 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 [2021-08-12 19:15:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:38,641 INFO L225 Difference]: With dead ends: 439 [2021-08-12 19:15:38,641 INFO L226 Difference]: Without dead ends: 422 [2021-08-12 19:15:38,641 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-12 19:15:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 184. [2021-08-12 19:15:38,676 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) [2021-08-12 19:15:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-08-12 19:15:38,677 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-08-12 19:15:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:38,677 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-08-12 19:15:38,677 INFO L483 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) [2021-08-12 19:15:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-08-12 19:15:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:38,677 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:38,677 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:38,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-08-12 19:15:38,678 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2035634772, now seen corresponding path program 38 times [2021-08-12 19:15:38,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:38,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782512578] [2021-08-12 19:15:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:38,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:38,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782512578] [2021-08-12 19:15:38,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782512578] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:38,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:38,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:38,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959494609] [2021-08-12 19:15:38,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:38,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:38,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:38,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:38,725 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) [2021-08-12 19:15:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:39,168 INFO L93 Difference]: Finished difference Result 437 states and 1196 transitions. [2021-08-12 19:15:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:39,168 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 [2021-08-12 19:15:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:39,170 INFO L225 Difference]: With dead ends: 437 [2021-08-12 19:15:39,170 INFO L226 Difference]: Without dead ends: 420 [2021-08-12 19:15:39,171 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-12 19:15:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 182. [2021-08-12 19:15:39,205 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) [2021-08-12 19:15:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-08-12 19:15:39,206 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-08-12 19:15:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:39,206 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-08-12 19:15:39,206 INFO L483 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) [2021-08-12 19:15:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-08-12 19:15:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:39,207 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:39,207 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:39,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-12 19:15:39,207 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash -51636616, now seen corresponding path program 39 times [2021-08-12 19:15:39,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:39,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277517885] [2021-08-12 19:15:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:39,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:39,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277517885] [2021-08-12 19:15:39,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277517885] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:39,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:39,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:39,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596086332] [2021-08-12 19:15:39,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:39,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:39,254 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) [2021-08-12 19:15:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:39,785 INFO L93 Difference]: Finished difference Result 470 states and 1260 transitions. [2021-08-12 19:15:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:39,785 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 [2021-08-12 19:15:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:39,787 INFO L225 Difference]: With dead ends: 470 [2021-08-12 19:15:39,787 INFO L226 Difference]: Without dead ends: 453 [2021-08-12 19:15:39,788 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-12 19:15:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 185. [2021-08-12 19:15:39,824 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) [2021-08-12 19:15:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 548 transitions. [2021-08-12 19:15:39,825 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 548 transitions. Word has length 17 [2021-08-12 19:15:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:39,825 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 548 transitions. [2021-08-12 19:15:39,825 INFO L483 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) [2021-08-12 19:15:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 548 transitions. [2021-08-12 19:15:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:39,825 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:39,826 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:39,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-12 19:15:39,826 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1221825612, now seen corresponding path program 40 times [2021-08-12 19:15:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:39,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646432492] [2021-08-12 19:15:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:39,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:39,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646432492] [2021-08-12 19:15:39,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646432492] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:39,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:39,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:39,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464672880] [2021-08-12 19:15:39,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:39,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:39,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:39,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:39,881 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) [2021-08-12 19:15:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:40,414 INFO L93 Difference]: Finished difference Result 454 states and 1237 transitions. [2021-08-12 19:15:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:40,414 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 [2021-08-12 19:15:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:40,416 INFO L225 Difference]: With dead ends: 454 [2021-08-12 19:15:40,416 INFO L226 Difference]: Without dead ends: 437 [2021-08-12 19:15:40,417 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-12 19:15:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 182. [2021-08-12 19:15:40,453 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) [2021-08-12 19:15:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-08-12 19:15:40,454 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-08-12 19:15:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:40,454 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-08-12 19:15:40,454 INFO L483 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) [2021-08-12 19:15:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-08-12 19:15:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:40,455 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:40,455 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:40,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-12 19:15:40,455 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1238762664, now seen corresponding path program 41 times [2021-08-12 19:15:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:40,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067699202] [2021-08-12 19:15:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:40,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:40,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067699202] [2021-08-12 19:15:40,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067699202] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:40,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:40,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:40,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025658350] [2021-08-12 19:15:40,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:40,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:40,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:40,502 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) [2021-08-12 19:15:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:41,011 INFO L93 Difference]: Finished difference Result 448 states and 1217 transitions. [2021-08-12 19:15:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:41,011 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 [2021-08-12 19:15:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:41,013 INFO L225 Difference]: With dead ends: 448 [2021-08-12 19:15:41,013 INFO L226 Difference]: Without dead ends: 431 [2021-08-12 19:15:41,013 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-12 19:15:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 184. [2021-08-12 19:15:41,052 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) [2021-08-12 19:15:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-08-12 19:15:41,053 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-08-12 19:15:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:41,053 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-08-12 19:15:41,053 INFO L483 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) [2021-08-12 19:15:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-08-12 19:15:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:41,053 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:41,053 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:41,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-12 19:15:41,053 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash -98478828, now seen corresponding path program 42 times [2021-08-12 19:15:41,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:41,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148414989] [2021-08-12 19:15:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:41,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:41,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148414989] [2021-08-12 19:15:41,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148414989] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:41,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:41,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:41,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212847362] [2021-08-12 19:15:41,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:41,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:41,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:41,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:41,102 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) [2021-08-12 19:15:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:41,595 INFO L93 Difference]: Finished difference Result 427 states and 1179 transitions. [2021-08-12 19:15:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:41,595 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 [2021-08-12 19:15:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:41,597 INFO L225 Difference]: With dead ends: 427 [2021-08-12 19:15:41,597 INFO L226 Difference]: Without dead ends: 410 [2021-08-12 19:15:41,597 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-12 19:15:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 179. [2021-08-12 19:15:41,646 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) [2021-08-12 19:15:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 518 transitions. [2021-08-12 19:15:41,647 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 518 transitions. Word has length 17 [2021-08-12 19:15:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:41,647 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 518 transitions. [2021-08-12 19:15:41,647 INFO L483 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) [2021-08-12 19:15:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 518 transitions. [2021-08-12 19:15:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:41,647 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:41,647 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:41,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-12 19:15:41,647 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:41,648 INFO L82 PathProgramCache]: Analyzing trace with hash -485249606, now seen corresponding path program 43 times [2021-08-12 19:15:41,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:41,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899550864] [2021-08-12 19:15:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:41,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:41,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899550864] [2021-08-12 19:15:41,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899550864] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:41,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:41,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:41,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499975915] [2021-08-12 19:15:41,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:41,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:41,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:41,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:41,690 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) [2021-08-12 19:15:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:42,047 INFO L93 Difference]: Finished difference Result 325 states and 891 transitions. [2021-08-12 19:15:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:42,047 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 [2021-08-12 19:15:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:42,049 INFO L225 Difference]: With dead ends: 325 [2021-08-12 19:15:42,049 INFO L226 Difference]: Without dead ends: 308 [2021-08-12 19:15:42,049 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-08-12 19:15:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 187. [2021-08-12 19:15:42,089 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) [2021-08-12 19:15:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-08-12 19:15:42,090 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 17 [2021-08-12 19:15:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:42,090 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-08-12 19:15:42,090 INFO L483 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) [2021-08-12 19:15:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-08-12 19:15:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:42,091 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:42,091 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:42,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-12 19:15:42,091 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:42,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2038445248, now seen corresponding path program 44 times [2021-08-12 19:15:42,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:42,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848922469] [2021-08-12 19:15:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:42,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:42,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848922469] [2021-08-12 19:15:42,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848922469] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:42,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:42,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:42,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262149996] [2021-08-12 19:15:42,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:42,141 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) [2021-08-12 19:15:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:42,608 INFO L93 Difference]: Finished difference Result 355 states and 953 transitions. [2021-08-12 19:15:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:42,608 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 [2021-08-12 19:15:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:42,610 INFO L225 Difference]: With dead ends: 355 [2021-08-12 19:15:42,610 INFO L226 Difference]: Without dead ends: 338 [2021-08-12 19:15:42,610 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-12 19:15:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 189. [2021-08-12 19:15:42,655 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) [2021-08-12 19:15:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-08-12 19:15:42,656 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-08-12 19:15:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:42,656 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-08-12 19:15:42,656 INFO L483 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) [2021-08-12 19:15:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-08-12 19:15:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:42,657 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:42,657 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:42,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-12 19:15:42,657 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash 412660612, now seen corresponding path program 45 times [2021-08-12 19:15:42,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:42,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871523004] [2021-08-12 19:15:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:42,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:42,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871523004] [2021-08-12 19:15:42,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871523004] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:42,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:42,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:42,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449191699] [2021-08-12 19:15:42,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:42,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:42,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:42,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:42,714 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) [2021-08-12 19:15:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:43,158 INFO L93 Difference]: Finished difference Result 338 states and 923 transitions. [2021-08-12 19:15:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:43,158 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 [2021-08-12 19:15:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:43,159 INFO L225 Difference]: With dead ends: 338 [2021-08-12 19:15:43,159 INFO L226 Difference]: Without dead ends: 321 [2021-08-12 19:15:43,160 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-12 19:15:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-08-12 19:15:43,202 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) [2021-08-12 19:15:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 528 transitions. [2021-08-12 19:15:43,203 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 528 transitions. Word has length 17 [2021-08-12 19:15:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:43,203 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 528 transitions. [2021-08-12 19:15:43,203 INFO L483 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) [2021-08-12 19:15:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 528 transitions. [2021-08-12 19:15:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:43,204 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:43,204 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:43,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-12 19:15:43,204 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:43,204 INFO L82 PathProgramCache]: Analyzing trace with hash 379489126, now seen corresponding path program 46 times [2021-08-12 19:15:43,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:43,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046670828] [2021-08-12 19:15:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:43,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046670828] [2021-08-12 19:15:43,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046670828] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:43,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:43,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:43,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067128690] [2021-08-12 19:15:43,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:43,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:43,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:43,252 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) [2021-08-12 19:15:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:43,658 INFO L93 Difference]: Finished difference Result 326 states and 891 transitions. [2021-08-12 19:15:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:43,659 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 [2021-08-12 19:15:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:43,660 INFO L225 Difference]: With dead ends: 326 [2021-08-12 19:15:43,660 INFO L226 Difference]: Without dead ends: 309 [2021-08-12 19:15:43,660 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-12 19:15:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2021-08-12 19:15:43,704 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) [2021-08-12 19:15:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-08-12 19:15:43,705 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-08-12 19:15:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:43,705 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-08-12 19:15:43,705 INFO L483 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) [2021-08-12 19:15:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-08-12 19:15:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:43,705 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:43,705 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:43,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-12 19:15:43,706 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:43,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1252190110, now seen corresponding path program 47 times [2021-08-12 19:15:43,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:43,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756919168] [2021-08-12 19:15:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:43,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756919168] [2021-08-12 19:15:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756919168] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:43,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:43,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:43,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447902821] [2021-08-12 19:15:43,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:43,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:43,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:43,761 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) [2021-08-12 19:15:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:44,259 INFO L93 Difference]: Finished difference Result 356 states and 956 transitions. [2021-08-12 19:15:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:44,259 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 [2021-08-12 19:15:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:44,260 INFO L225 Difference]: With dead ends: 356 [2021-08-12 19:15:44,260 INFO L226 Difference]: Without dead ends: 339 [2021-08-12 19:15:44,261 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-12 19:15:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 191. [2021-08-12 19:15:44,309 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) [2021-08-12 19:15:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 552 transitions. [2021-08-12 19:15:44,310 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 552 transitions. Word has length 17 [2021-08-12 19:15:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:44,310 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 552 transitions. [2021-08-12 19:15:44,310 INFO L483 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) [2021-08-12 19:15:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 552 transitions. [2021-08-12 19:15:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:44,310 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:44,310 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:44,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-08-12 19:15:44,311 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:44,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1416992550, now seen corresponding path program 48 times [2021-08-12 19:15:44,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:44,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089765035] [2021-08-12 19:15:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:44,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:44,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089765035] [2021-08-12 19:15:44,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089765035] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:44,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:44,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:44,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681912960] [2021-08-12 19:15:44,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:44,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:44,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:44,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:44,355 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) [2021-08-12 19:15:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:44,825 INFO L93 Difference]: Finished difference Result 335 states and 918 transitions. [2021-08-12 19:15:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:44,826 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 [2021-08-12 19:15:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:44,827 INFO L225 Difference]: With dead ends: 335 [2021-08-12 19:15:44,827 INFO L226 Difference]: Without dead ends: 318 [2021-08-12 19:15:44,827 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-08-12 19:15:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 189. [2021-08-12 19:15:44,873 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) [2021-08-12 19:15:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-08-12 19:15:44,874 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-08-12 19:15:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:44,874 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-08-12 19:15:44,874 INFO L483 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) [2021-08-12 19:15:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-08-12 19:15:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:44,874 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:44,874 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:44,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-08-12 19:15:44,874 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -167418646, now seen corresponding path program 49 times [2021-08-12 19:15:44,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:44,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755047807] [2021-08-12 19:15:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:44,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:44,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755047807] [2021-08-12 19:15:44,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755047807] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:44,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:44,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:44,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364953909] [2021-08-12 19:15:44,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:44,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:44,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:44,934 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) [2021-08-12 19:15:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:45,472 INFO L93 Difference]: Finished difference Result 388 states and 1070 transitions. [2021-08-12 19:15:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:45,472 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 [2021-08-12 19:15:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:45,473 INFO L225 Difference]: With dead ends: 388 [2021-08-12 19:15:45,474 INFO L226 Difference]: Without dead ends: 371 [2021-08-12 19:15:45,474 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-12 19:15:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 194. [2021-08-12 19:15:45,523 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) [2021-08-12 19:15:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions. [2021-08-12 19:15:45,524 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 17 [2021-08-12 19:15:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:45,524 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 564 transitions. [2021-08-12 19:15:45,524 INFO L483 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) [2021-08-12 19:15:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions. [2021-08-12 19:15:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:45,525 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:45,525 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:45,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-08-12 19:15:45,525 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1386054006, now seen corresponding path program 50 times [2021-08-12 19:15:45,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:45,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011455371] [2021-08-12 19:15:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:45,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:45,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011455371] [2021-08-12 19:15:45,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011455371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:45,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:45,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:45,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657293532] [2021-08-12 19:15:45,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:45,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:45,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:45,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:45,590 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) [2021-08-12 19:15:46,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:46,145 INFO L93 Difference]: Finished difference Result 392 states and 1076 transitions. [2021-08-12 19:15:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:46,145 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 [2021-08-12 19:15:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:46,147 INFO L225 Difference]: With dead ends: 392 [2021-08-12 19:15:46,147 INFO L226 Difference]: Without dead ends: 375 [2021-08-12 19:15:46,147 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-12 19:15:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 192. [2021-08-12 19:15:46,196 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) [2021-08-12 19:15:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-08-12 19:15:46,197 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-08-12 19:15:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:46,197 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-08-12 19:15:46,197 INFO L483 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) [2021-08-12 19:15:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-08-12 19:15:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:46,198 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:46,198 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:46,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-12 19:15:46,198 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:46,199 INFO L82 PathProgramCache]: Analyzing trace with hash -310342850, now seen corresponding path program 51 times [2021-08-12 19:15:46,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:46,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099715764] [2021-08-12 19:15:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:46,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:46,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099715764] [2021-08-12 19:15:46,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099715764] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:46,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:46,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:46,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364394040] [2021-08-12 19:15:46,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:46,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:46,248 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) [2021-08-12 19:15:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:46,787 INFO L93 Difference]: Finished difference Result 388 states and 1062 transitions. [2021-08-12 19:15:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:46,787 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 [2021-08-12 19:15:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:46,789 INFO L225 Difference]: With dead ends: 388 [2021-08-12 19:15:46,789 INFO L226 Difference]: Without dead ends: 371 [2021-08-12 19:15:46,789 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-12 19:15:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-08-12 19:15:46,839 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) [2021-08-12 19:15:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-08-12 19:15:46,840 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-08-12 19:15:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:46,840 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-08-12 19:15:46,840 INFO L483 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) [2021-08-12 19:15:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-08-12 19:15:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:46,840 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:46,840 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:46,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-12 19:15:46,841 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash -548101402, now seen corresponding path program 52 times [2021-08-12 19:15:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:46,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898043139] [2021-08-12 19:15:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:46,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:46,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898043139] [2021-08-12 19:15:46,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898043139] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:46,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:46,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:46,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826005473] [2021-08-12 19:15:46,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:46,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:46,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:46,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:46,884 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) [2021-08-12 19:15:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:47,591 INFO L93 Difference]: Finished difference Result 466 states and 1258 transitions. [2021-08-12 19:15:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:47,591 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 [2021-08-12 19:15:47,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:47,592 INFO L225 Difference]: With dead ends: 466 [2021-08-12 19:15:47,592 INFO L226 Difference]: Without dead ends: 449 [2021-08-12 19:15:47,593 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-12 19:15:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-08-12 19:15:47,646 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) [2021-08-12 19:15:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-08-12 19:15:47,647 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-08-12 19:15:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:47,647 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-08-12 19:15:47,647 INFO L483 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) [2021-08-12 19:15:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-08-12 19:15:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:47,647 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:47,647 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:47,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-08-12 19:15:47,648 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1766736762, now seen corresponding path program 53 times [2021-08-12 19:15:47,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:47,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621757225] [2021-08-12 19:15:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:47,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:47,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621757225] [2021-08-12 19:15:47,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621757225] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:47,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:47,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520464427] [2021-08-12 19:15:47,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:47,692 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) [2021-08-12 19:15:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:48,495 INFO L93 Difference]: Finished difference Result 470 states and 1264 transitions. [2021-08-12 19:15:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:48,495 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 [2021-08-12 19:15:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:48,496 INFO L225 Difference]: With dead ends: 470 [2021-08-12 19:15:48,496 INFO L226 Difference]: Without dead ends: 453 [2021-08-12 19:15:48,496 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-12 19:15:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 193. [2021-08-12 19:15:48,565 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) [2021-08-12 19:15:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-08-12 19:15:48,576 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-08-12 19:15:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:48,577 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-08-12 19:15:48,577 INFO L483 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) [2021-08-12 19:15:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-08-12 19:15:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:48,583 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:48,583 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:48,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-08-12 19:15:48,583 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:48,583 INFO L82 PathProgramCache]: Analyzing trace with hash 440959146, now seen corresponding path program 54 times [2021-08-12 19:15:48,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:48,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660203340] [2021-08-12 19:15:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:48,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:48,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660203340] [2021-08-12 19:15:48,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660203340] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:48,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:48,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732187473] [2021-08-12 19:15:48,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:48,639 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) [2021-08-12 19:15:49,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:49,523 INFO L93 Difference]: Finished difference Result 433 states and 1184 transitions. [2021-08-12 19:15:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:49,523 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 [2021-08-12 19:15:49,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:49,525 INFO L225 Difference]: With dead ends: 433 [2021-08-12 19:15:49,525 INFO L226 Difference]: Without dead ends: 416 [2021-08-12 19:15:49,526 INFO L806 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 [2021-08-12 19:15:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-12 19:15:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2021-08-12 19:15:49,647 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) [2021-08-12 19:15:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 575 transitions. [2021-08-12 19:15:49,647 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 575 transitions. Word has length 17 [2021-08-12 19:15:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:49,647 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 575 transitions. [2021-08-12 19:15:49,648 INFO L483 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) [2021-08-12 19:15:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 575 transitions. [2021-08-12 19:15:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:49,664 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:49,664 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:49,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-12 19:15:49,664 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:49,664 INFO L82 PathProgramCache]: Analyzing trace with hash -729229850, now seen corresponding path program 55 times [2021-08-12 19:15:49,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:49,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760308554] [2021-08-12 19:15:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:49,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:49,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760308554] [2021-08-12 19:15:49,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760308554] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:49,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:49,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:49,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610258742] [2021-08-12 19:15:49,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:49,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:49,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:49,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:49,714 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) [2021-08-12 19:15:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:50,400 INFO L93 Difference]: Finished difference Result 417 states and 1161 transitions. [2021-08-12 19:15:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:50,400 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 [2021-08-12 19:15:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:50,402 INFO L225 Difference]: With dead ends: 417 [2021-08-12 19:15:50,402 INFO L226 Difference]: Without dead ends: 400 [2021-08-12 19:15:50,402 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-12 19:15:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 193. [2021-08-12 19:15:50,480 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) [2021-08-12 19:15:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-08-12 19:15:50,481 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-08-12 19:15:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:50,481 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-08-12 19:15:50,481 INFO L483 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) [2021-08-12 19:15:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-08-12 19:15:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:50,482 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:50,482 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:50,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-12 19:15:50,482 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:50,482 INFO L82 PathProgramCache]: Analyzing trace with hash -746166902, now seen corresponding path program 56 times [2021-08-12 19:15:50,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:50,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996202158] [2021-08-12 19:15:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:50,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996202158] [2021-08-12 19:15:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996202158] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:50,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:50,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113971230] [2021-08-12 19:15:50,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:50,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:50,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:50,559 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) [2021-08-12 19:15:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:51,356 INFO L93 Difference]: Finished difference Result 451 states and 1231 transitions. [2021-08-12 19:15:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:51,356 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 [2021-08-12 19:15:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:51,358 INFO L225 Difference]: With dead ends: 451 [2021-08-12 19:15:51,358 INFO L226 Difference]: Without dead ends: 434 [2021-08-12 19:15:51,358 INFO L806 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 [2021-08-12 19:15:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-12 19:15:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 195. [2021-08-12 19:15:51,420 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) [2021-08-12 19:15:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-08-12 19:15:51,421 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-08-12 19:15:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:51,421 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-08-12 19:15:51,421 INFO L483 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) [2021-08-12 19:15:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-08-12 19:15:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:51,422 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:51,422 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:51,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-12 19:15:51,422 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash 394116934, now seen corresponding path program 57 times [2021-08-12 19:15:51,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:51,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728395742] [2021-08-12 19:15:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:51,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:51,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728395742] [2021-08-12 19:15:51,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728395742] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:51,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:51,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:51,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061887987] [2021-08-12 19:15:51,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:51,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:51,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:51,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:51,484 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) [2021-08-12 19:15:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:52,319 INFO L93 Difference]: Finished difference Result 430 states and 1193 transitions. [2021-08-12 19:15:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:52,319 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 [2021-08-12 19:15:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:52,321 INFO L225 Difference]: With dead ends: 430 [2021-08-12 19:15:52,321 INFO L226 Difference]: Without dead ends: 413 [2021-08-12 19:15:52,321 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:15:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-12 19:15:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 192. [2021-08-12 19:15:52,402 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) [2021-08-12 19:15:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-08-12 19:15:52,403 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-08-12 19:15:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:52,403 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-08-12 19:15:52,403 INFO L483 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) [2021-08-12 19:15:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-08-12 19:15:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:52,404 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:52,404 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:52,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-08-12 19:15:52,404 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1262551738, now seen corresponding path program 58 times [2021-08-12 19:15:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:52,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047626387] [2021-08-12 19:15:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:52,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:52,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047626387] [2021-08-12 19:15:52,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047626387] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:52,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:52,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:52,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650146460] [2021-08-12 19:15:52,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:52,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:52,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:52,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:52,472 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) [2021-08-12 19:15:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:53,221 INFO L93 Difference]: Finished difference Result 431 states and 1163 transitions. [2021-08-12 19:15:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:53,221 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 [2021-08-12 19:15:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:53,223 INFO L225 Difference]: With dead ends: 431 [2021-08-12 19:15:53,223 INFO L226 Difference]: Without dead ends: 414 [2021-08-12 19:15:53,223 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:53,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-12 19:15:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 194. [2021-08-12 19:15:53,284 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) [2021-08-12 19:15:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 562 transitions. [2021-08-12 19:15:53,285 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 562 transitions. Word has length 17 [2021-08-12 19:15:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:53,285 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 562 transitions. [2021-08-12 19:15:53,285 INFO L483 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) [2021-08-12 19:15:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 562 transitions. [2021-08-12 19:15:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:53,285 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:53,285 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:53,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-08-12 19:15:53,285 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2074864322, now seen corresponding path program 59 times [2021-08-12 19:15:53,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:53,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494030420] [2021-08-12 19:15:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:53,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494030420] [2021-08-12 19:15:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494030420] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:53,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:53,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:53,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929031183] [2021-08-12 19:15:53,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:53,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:53,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:53,329 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) [2021-08-12 19:15:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:54,128 INFO L93 Difference]: Finished difference Result 432 states and 1174 transitions. [2021-08-12 19:15:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:54,129 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 [2021-08-12 19:15:54,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:54,130 INFO L225 Difference]: With dead ends: 432 [2021-08-12 19:15:54,130 INFO L226 Difference]: Without dead ends: 415 [2021-08-12 19:15:54,130 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-12 19:15:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 196. [2021-08-12 19:15:54,194 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) [2021-08-12 19:15:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 571 transitions. [2021-08-12 19:15:54,195 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 571 transitions. Word has length 17 [2021-08-12 19:15:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:54,195 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 571 transitions. [2021-08-12 19:15:54,195 INFO L483 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) [2021-08-12 19:15:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 571 transitions. [2021-08-12 19:15:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:54,195 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:54,195 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:54,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-12 19:15:54,196 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:54,196 INFO L82 PathProgramCache]: Analyzing trace with hash -934580486, now seen corresponding path program 60 times [2021-08-12 19:15:54,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:54,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029849247] [2021-08-12 19:15:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:54,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:54,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029849247] [2021-08-12 19:15:54,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029849247] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:54,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:54,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:54,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045414120] [2021-08-12 19:15:54,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:54,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:54,237 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) [2021-08-12 19:15:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:54,988 INFO L93 Difference]: Finished difference Result 411 states and 1136 transitions. [2021-08-12 19:15:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:54,988 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 [2021-08-12 19:15:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:54,990 INFO L225 Difference]: With dead ends: 411 [2021-08-12 19:15:54,990 INFO L226 Difference]: Without dead ends: 394 [2021-08-12 19:15:54,990 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:15:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-12 19:15:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 192. [2021-08-12 19:15:55,056 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) [2021-08-12 19:15:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-08-12 19:15:55,056 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-08-12 19:15:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:55,057 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-08-12 19:15:55,057 INFO L483 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) [2021-08-12 19:15:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-08-12 19:15:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:55,057 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:55,057 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:55,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-12 19:15:55,057 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash -674451760, now seen corresponding path program 61 times [2021-08-12 19:15:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:55,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092332725] [2021-08-12 19:15:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:55,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:55,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092332725] [2021-08-12 19:15:55,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092332725] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:55,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:55,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114550875] [2021-08-12 19:15:55,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:55,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:55,105 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) [2021-08-12 19:15:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:55,656 INFO L93 Difference]: Finished difference Result 330 states and 905 transitions. [2021-08-12 19:15:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:55,657 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 [2021-08-12 19:15:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:55,658 INFO L225 Difference]: With dead ends: 330 [2021-08-12 19:15:55,658 INFO L226 Difference]: Without dead ends: 313 [2021-08-12 19:15:55,658 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-12 19:15:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 197. [2021-08-12 19:15:55,723 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) [2021-08-12 19:15:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-08-12 19:15:55,724 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-08-12 19:15:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:55,724 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-08-12 19:15:55,724 INFO L483 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) [2021-08-12 19:15:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-08-12 19:15:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:55,724 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:55,725 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:55,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-12 19:15:55,725 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1924375180, now seen corresponding path program 62 times [2021-08-12 19:15:55,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:55,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163952784] [2021-08-12 19:15:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:55,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:55,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163952784] [2021-08-12 19:15:55,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163952784] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:55,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:55,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:55,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229757950] [2021-08-12 19:15:55,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:55,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:55,765 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) [2021-08-12 19:15:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:56,448 INFO L93 Difference]: Finished difference Result 359 states and 965 transitions. [2021-08-12 19:15:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:56,449 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 [2021-08-12 19:15:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:56,450 INFO L225 Difference]: With dead ends: 359 [2021-08-12 19:15:56,450 INFO L226 Difference]: Without dead ends: 342 [2021-08-12 19:15:56,450 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-08-12 19:15:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 199. [2021-08-12 19:15:56,518 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) [2021-08-12 19:15:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-08-12 19:15:56,519 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-08-12 19:15:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:56,519 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-08-12 19:15:56,519 INFO L483 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) [2021-08-12 19:15:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-08-12 19:15:56,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:56,520 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:56,520 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:56,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-08-12 19:15:56,520 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1151956756, now seen corresponding path program 63 times [2021-08-12 19:15:56,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:56,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012591791] [2021-08-12 19:15:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:56,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:56,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012591791] [2021-08-12 19:15:56,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012591791] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:56,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:56,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:56,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487186022] [2021-08-12 19:15:56,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:56,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:56,564 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) [2021-08-12 19:15:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:57,179 INFO L93 Difference]: Finished difference Result 336 states and 920 transitions. [2021-08-12 19:15:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:57,179 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 [2021-08-12 19:15:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:57,180 INFO L225 Difference]: With dead ends: 336 [2021-08-12 19:15:57,180 INFO L226 Difference]: Without dead ends: 319 [2021-08-12 19:15:57,180 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-12 19:15:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-08-12 19:15:57,248 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) [2021-08-12 19:15:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-08-12 19:15:57,249 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-08-12 19:15:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:57,249 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-08-12 19:15:57,249 INFO L483 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) [2021-08-12 19:15:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-08-12 19:15:57,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:57,249 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:57,249 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:57,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-08-12 19:15:57,249 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:57,250 INFO L82 PathProgramCache]: Analyzing trace with hash 263807996, now seen corresponding path program 64 times [2021-08-12 19:15:57,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:57,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911982960] [2021-08-12 19:15:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:57,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:57,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911982960] [2021-08-12 19:15:57,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911982960] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:57,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:57,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:57,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28733438] [2021-08-12 19:15:57,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:57,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:57,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:57,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:57,292 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) [2021-08-12 19:15:57,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:57,983 INFO L93 Difference]: Finished difference Result 351 states and 947 transitions. [2021-08-12 19:15:57,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:57,983 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 [2021-08-12 19:15:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:57,984 INFO L225 Difference]: With dead ends: 351 [2021-08-12 19:15:57,984 INFO L226 Difference]: Without dead ends: 334 [2021-08-12 19:15:57,985 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-12 19:15:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 199. [2021-08-12 19:15:58,057 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) [2021-08-12 19:15:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-08-12 19:15:58,058 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-08-12 19:15:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:58,058 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-08-12 19:15:58,058 INFO L483 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) [2021-08-12 19:15:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-08-12 19:15:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:58,058 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:58,058 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:58,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-08-12 19:15:58,059 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:58,059 INFO L82 PathProgramCache]: Analyzing trace with hash -954827364, now seen corresponding path program 65 times [2021-08-12 19:15:58,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:58,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855406663] [2021-08-12 19:15:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:58,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:58,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855406663] [2021-08-12 19:15:58,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855406663] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:58,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:58,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:58,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552465382] [2021-08-12 19:15:58,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:58,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:58,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:58,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:58,104 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) [2021-08-12 19:15:58,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:58,808 INFO L93 Difference]: Finished difference Result 355 states and 953 transitions. [2021-08-12 19:15:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:58,808 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 [2021-08-12 19:15:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:58,809 INFO L225 Difference]: With dead ends: 355 [2021-08-12 19:15:58,809 INFO L226 Difference]: Without dead ends: 338 [2021-08-12 19:15:58,809 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-12 19:15:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2021-08-12 19:15:58,881 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) [2021-08-12 19:15:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-08-12 19:15:58,882 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-08-12 19:15:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:58,882 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-08-12 19:15:58,882 INFO L483 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) [2021-08-12 19:15:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-08-12 19:15:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:58,883 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:58,883 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:58,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-08-12 19:15:58,883 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:58,883 INFO L82 PathProgramCache]: Analyzing trace with hash 120883792, now seen corresponding path program 66 times [2021-08-12 19:15:58,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:58,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594890979] [2021-08-12 19:15:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:58,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:58,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594890979] [2021-08-12 19:15:58,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594890979] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:58,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:58,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:58,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912002254] [2021-08-12 19:15:58,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:58,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:58,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:58,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:58,928 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) [2021-08-12 19:15:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:59,548 INFO L93 Difference]: Finished difference Result 326 states and 893 transitions. [2021-08-12 19:15:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:15:59,548 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 [2021-08-12 19:15:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:59,549 INFO L225 Difference]: With dead ends: 326 [2021-08-12 19:15:59,549 INFO L226 Difference]: Without dead ends: 309 [2021-08-12 19:15:59,549 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:15:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-12 19:15:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2021-08-12 19:15:59,622 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) [2021-08-12 19:15:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-08-12 19:15:59,622 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-08-12 19:15:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:59,623 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-08-12 19:15:59,623 INFO L483 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) [2021-08-12 19:15:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-08-12 19:15:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:15:59,623 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:59,623 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:59,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-08-12 19:15:59,623 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash 409284692, now seen corresponding path program 67 times [2021-08-12 19:15:59,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:59,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837230522] [2021-08-12 19:15:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:59,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:59,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837230522] [2021-08-12 19:15:59,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837230522] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:15:59,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:15:59,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:15:59,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084696983] [2021-08-12 19:15:59,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:15:59,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:59,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:15:59,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:15:59,665 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) [2021-08-12 19:16:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:00,552 INFO L93 Difference]: Finished difference Result 444 states and 1203 transitions. [2021-08-12 19:16:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:00,552 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 [2021-08-12 19:16:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:00,554 INFO L225 Difference]: With dead ends: 444 [2021-08-12 19:16:00,554 INFO L226 Difference]: Without dead ends: 427 [2021-08-12 19:16:00,554 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-12 19:16:00,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 198. [2021-08-12 19:16:00,630 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) [2021-08-12 19:16:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-08-12 19:16:00,631 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-08-12 19:16:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:00,631 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-08-12 19:16:00,631 INFO L483 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) [2021-08-12 19:16:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-08-12 19:16:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:00,631 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:00,631 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:00,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-08-12 19:16:00,632 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash -840638728, now seen corresponding path program 68 times [2021-08-12 19:16:00,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:00,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9700623] [2021-08-12 19:16:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:00,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:00,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9700623] [2021-08-12 19:16:00,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9700623] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:00,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:00,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276436087] [2021-08-12 19:16:00,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:00,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:00,676 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) [2021-08-12 19:16:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:01,675 INFO L93 Difference]: Finished difference Result 467 states and 1250 transitions. [2021-08-12 19:16:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:01,675 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 [2021-08-12 19:16:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:01,677 INFO L225 Difference]: With dead ends: 467 [2021-08-12 19:16:01,677 INFO L226 Difference]: Without dead ends: 450 [2021-08-12 19:16:01,677 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-12 19:16:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 200. [2021-08-12 19:16:01,756 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) [2021-08-12 19:16:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-08-12 19:16:01,757 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-08-12 19:16:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:01,758 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-08-12 19:16:01,758 INFO L483 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) [2021-08-12 19:16:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-08-12 19:16:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:01,758 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:01,758 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:01,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-12 19:16:01,758 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2059274088, now seen corresponding path program 69 times [2021-08-12 19:16:01,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:01,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141004620] [2021-08-12 19:16:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:01,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141004620] [2021-08-12 19:16:01,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141004620] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:01,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:01,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:01,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507870155] [2021-08-12 19:16:01,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:01,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:01,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:01,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:01,805 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) [2021-08-12 19:16:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:02,783 INFO L93 Difference]: Finished difference Result 444 states and 1205 transitions. [2021-08-12 19:16:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:02,783 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 [2021-08-12 19:16:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:02,785 INFO L225 Difference]: With dead ends: 444 [2021-08-12 19:16:02,785 INFO L226 Difference]: Without dead ends: 427 [2021-08-12 19:16:02,785 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-12 19:16:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 196. [2021-08-12 19:16:02,862 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) [2021-08-12 19:16:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-08-12 19:16:02,863 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-08-12 19:16:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:02,863 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-08-12 19:16:02,863 INFO L483 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) [2021-08-12 19:16:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-08-12 19:16:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:02,863 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:02,863 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:02,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-12 19:16:02,864 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1005390608, now seen corresponding path program 70 times [2021-08-12 19:16:02,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:02,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107299692] [2021-08-12 19:16:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:02,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:02,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107299692] [2021-08-12 19:16:02,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107299692] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:02,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:02,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:02,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010397259] [2021-08-12 19:16:02,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:02,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:02,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:02,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:02,949 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) [2021-08-12 19:16:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:03,854 INFO L93 Difference]: Finished difference Result 395 states and 1087 transitions. [2021-08-12 19:16:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:03,855 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 [2021-08-12 19:16:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:03,856 INFO L225 Difference]: With dead ends: 395 [2021-08-12 19:16:03,856 INFO L226 Difference]: Without dead ends: 378 [2021-08-12 19:16:03,856 INFO L806 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 [2021-08-12 19:16:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-08-12 19:16:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 199. [2021-08-12 19:16:03,945 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) [2021-08-12 19:16:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-08-12 19:16:03,946 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-08-12 19:16:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:03,948 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-08-12 19:16:03,948 INFO L483 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) [2021-08-12 19:16:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-08-12 19:16:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:03,949 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:03,949 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:03,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-08-12 19:16:03,950 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash 184219092, now seen corresponding path program 71 times [2021-08-12 19:16:03,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:03,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37298902] [2021-08-12 19:16:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:04,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:04,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37298902] [2021-08-12 19:16:04,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37298902] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:04,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:04,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:04,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561201086] [2021-08-12 19:16:04,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:04,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:04,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:04,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:04,045 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) [2021-08-12 19:16:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:04,972 INFO L93 Difference]: Finished difference Result 393 states and 1091 transitions. [2021-08-12 19:16:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:04,973 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 [2021-08-12 19:16:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:04,974 INFO L225 Difference]: With dead ends: 393 [2021-08-12 19:16:04,974 INFO L226 Difference]: Without dead ends: 376 [2021-08-12 19:16:04,975 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-08-12 19:16:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 202. [2021-08-12 19:16:05,058 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) [2021-08-12 19:16:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 594 transitions. [2021-08-12 19:16:05,059 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 594 transitions. Word has length 17 [2021-08-12 19:16:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:05,060 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 594 transitions. [2021-08-12 19:16:05,060 INFO L483 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) [2021-08-12 19:16:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 594 transitions. [2021-08-12 19:16:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:05,060 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:05,060 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:05,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-12 19:16:05,061 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1514501296, now seen corresponding path program 72 times [2021-08-12 19:16:05,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:05,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362914874] [2021-08-12 19:16:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:05,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:05,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362914874] [2021-08-12 19:16:05,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362914874] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:05,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:05,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:05,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095813780] [2021-08-12 19:16:05,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:05,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:05,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:05,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:05,126 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) [2021-08-12 19:16:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:05,977 INFO L93 Difference]: Finished difference Result 370 states and 1046 transitions. [2021-08-12 19:16:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:05,977 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 [2021-08-12 19:16:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:05,978 INFO L225 Difference]: With dead ends: 370 [2021-08-12 19:16:05,979 INFO L226 Difference]: Without dead ends: 353 [2021-08-12 19:16:05,979 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-12 19:16:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 196. [2021-08-12 19:16:06,063 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) [2021-08-12 19:16:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-08-12 19:16:06,064 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-08-12 19:16:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:06,064 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-08-12 19:16:06,064 INFO L483 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) [2021-08-12 19:16:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-08-12 19:16:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:06,065 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:06,065 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:06,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-08-12 19:16:06,065 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:06,065 INFO L82 PathProgramCache]: Analyzing trace with hash 81063412, now seen corresponding path program 73 times [2021-08-12 19:16:06,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:06,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206746553] [2021-08-12 19:16:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:06,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:06,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206746553] [2021-08-12 19:16:06,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206746553] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:06,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:06,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:06,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663713820] [2021-08-12 19:16:06,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:06,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:06,106 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) [2021-08-12 19:16:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:07,205 INFO L93 Difference]: Finished difference Result 447 states and 1231 transitions. [2021-08-12 19:16:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:07,205 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 [2021-08-12 19:16:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:07,207 INFO L225 Difference]: With dead ends: 447 [2021-08-12 19:16:07,207 INFO L226 Difference]: Without dead ends: 430 [2021-08-12 19:16:07,207 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-12 19:16:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 199. [2021-08-12 19:16:07,296 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) [2021-08-12 19:16:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-08-12 19:16:07,297 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-08-12 19:16:07,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:07,297 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-08-12 19:16:07,297 INFO L483 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) [2021-08-12 19:16:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-08-12 19:16:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:07,298 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:07,298 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:07,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-08-12 19:16:07,298 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:07,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:07,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1137571948, now seen corresponding path program 74 times [2021-08-12 19:16:07,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:07,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444977433] [2021-08-12 19:16:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:07,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:07,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444977433] [2021-08-12 19:16:07,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444977433] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:07,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:07,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:07,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653676767] [2021-08-12 19:16:07,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:07,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:07,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:07,345 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) [2021-08-12 19:16:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:08,466 INFO L93 Difference]: Finished difference Result 445 states and 1224 transitions. [2021-08-12 19:16:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:08,466 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 [2021-08-12 19:16:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:08,467 INFO L225 Difference]: With dead ends: 445 [2021-08-12 19:16:08,467 INFO L226 Difference]: Without dead ends: 428 [2021-08-12 19:16:08,468 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-12 19:16:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 197. [2021-08-12 19:16:08,557 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) [2021-08-12 19:16:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-08-12 19:16:08,558 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-08-12 19:16:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:08,558 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-08-12 19:16:08,558 INFO L483 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) [2021-08-12 19:16:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-08-12 19:16:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:08,558 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:08,558 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:08,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-08-12 19:16:08,559 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1070123960, now seen corresponding path program 75 times [2021-08-12 19:16:08,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:08,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335736705] [2021-08-12 19:16:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:08,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:08,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335736705] [2021-08-12 19:16:08,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335736705] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:08,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:08,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:08,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624771150] [2021-08-12 19:16:08,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:08,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:08,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:08,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:08,606 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) [2021-08-12 19:16:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:09,750 INFO L93 Difference]: Finished difference Result 439 states and 1203 transitions. [2021-08-12 19:16:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:09,750 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 [2021-08-12 19:16:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:09,752 INFO L225 Difference]: With dead ends: 439 [2021-08-12 19:16:09,752 INFO L226 Difference]: Without dead ends: 422 [2021-08-12 19:16:09,752 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-12 19:16:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 200. [2021-08-12 19:16:09,848 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) [2021-08-12 19:16:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-08-12 19:16:09,849 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-08-12 19:16:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:09,849 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-08-12 19:16:09,849 INFO L483 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) [2021-08-12 19:16:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-08-12 19:16:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:09,849 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:09,849 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:09,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-08-12 19:16:09,849 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:09,850 INFO L82 PathProgramCache]: Analyzing trace with hash -100065036, now seen corresponding path program 76 times [2021-08-12 19:16:09,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:09,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617155265] [2021-08-12 19:16:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:09,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:09,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617155265] [2021-08-12 19:16:09,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617155265] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:09,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:09,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:09,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511995427] [2021-08-12 19:16:09,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:09,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:09,926 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) [2021-08-12 19:16:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:11,047 INFO L93 Difference]: Finished difference Result 423 states and 1180 transitions. [2021-08-12 19:16:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:11,047 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 [2021-08-12 19:16:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:11,048 INFO L225 Difference]: With dead ends: 423 [2021-08-12 19:16:11,048 INFO L226 Difference]: Without dead ends: 406 [2021-08-12 19:16:11,048 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-12 19:16:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 197. [2021-08-12 19:16:11,141 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) [2021-08-12 19:16:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-08-12 19:16:11,142 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-08-12 19:16:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:11,142 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-08-12 19:16:11,142 INFO L483 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) [2021-08-12 19:16:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-08-12 19:16:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:11,143 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:11,143 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:11,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-08-12 19:16:11,143 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash -117002088, now seen corresponding path program 77 times [2021-08-12 19:16:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:11,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592006520] [2021-08-12 19:16:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:11,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:11,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592006520] [2021-08-12 19:16:11,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592006520] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:11,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:11,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:11,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184700063] [2021-08-12 19:16:11,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:11,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:11,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:11,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:11,187 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) [2021-08-12 19:16:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:12,228 INFO L93 Difference]: Finished difference Result 407 states and 1131 transitions. [2021-08-12 19:16:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:12,228 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 [2021-08-12 19:16:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:12,229 INFO L225 Difference]: With dead ends: 407 [2021-08-12 19:16:12,229 INFO L226 Difference]: Without dead ends: 390 [2021-08-12 19:16:12,230 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:12,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-12 19:16:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 199. [2021-08-12 19:16:12,325 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) [2021-08-12 19:16:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-08-12 19:16:12,326 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-08-12 19:16:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:12,326 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-08-12 19:16:12,326 INFO L483 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) [2021-08-12 19:16:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-08-12 19:16:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:12,327 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:12,327 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:12,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-08-12 19:16:12,327 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:12,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1023281748, now seen corresponding path program 78 times [2021-08-12 19:16:12,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:12,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446728228] [2021-08-12 19:16:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:12,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446728228] [2021-08-12 19:16:12,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446728228] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:12,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:12,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:12,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423277780] [2021-08-12 19:16:12,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:12,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:12,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:12,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:12,369 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) [2021-08-12 19:16:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:13,347 INFO L93 Difference]: Finished difference Result 386 states and 1093 transitions. [2021-08-12 19:16:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:13,347 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 [2021-08-12 19:16:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:13,349 INFO L225 Difference]: With dead ends: 386 [2021-08-12 19:16:13,349 INFO L226 Difference]: Without dead ends: 369 [2021-08-12 19:16:13,349 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-12 19:16:13,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 195. [2021-08-12 19:16:13,447 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) [2021-08-12 19:16:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-08-12 19:16:13,448 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-08-12 19:16:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:13,448 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-08-12 19:16:13,448 INFO L483 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) [2021-08-12 19:16:13,448 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-08-12 19:16:13,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:13,449 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:13,449 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:13,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-08-12 19:16:13,449 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1228196736, now seen corresponding path program 79 times [2021-08-12 19:16:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:13,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746555367] [2021-08-12 19:16:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:13,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746555367] [2021-08-12 19:16:13,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746555367] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:13,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:13,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:13,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858988064] [2021-08-12 19:16:13,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:13,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:13,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:13,492 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) [2021-08-12 19:16:14,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:14,659 INFO L93 Difference]: Finished difference Result 427 states and 1165 transitions. [2021-08-12 19:16:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:14,659 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 [2021-08-12 19:16:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:14,660 INFO L225 Difference]: With dead ends: 427 [2021-08-12 19:16:14,660 INFO L226 Difference]: Without dead ends: 410 [2021-08-12 19:16:14,660 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-12 19:16:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 200. [2021-08-12 19:16:14,760 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) [2021-08-12 19:16:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-08-12 19:16:14,760 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-08-12 19:16:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:14,761 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-08-12 19:16:14,761 INFO L483 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) [2021-08-12 19:16:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-08-12 19:16:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:14,761 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:14,761 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:14,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-08-12 19:16:14,761 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:14,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1848135200, now seen corresponding path program 80 times [2021-08-12 19:16:14,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:14,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601089712] [2021-08-12 19:16:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:14,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:14,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601089712] [2021-08-12 19:16:14,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601089712] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:14,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:14,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997606626] [2021-08-12 19:16:14,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:14,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:14,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:14,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:14,806 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) [2021-08-12 19:16:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:16,008 INFO L93 Difference]: Finished difference Result 431 states and 1171 transitions. [2021-08-12 19:16:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:16,008 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 [2021-08-12 19:16:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:16,009 INFO L225 Difference]: With dead ends: 431 [2021-08-12 19:16:16,009 INFO L226 Difference]: Without dead ends: 414 [2021-08-12 19:16:16,009 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-12 19:16:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 198. [2021-08-12 19:16:16,108 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) [2021-08-12 19:16:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-08-12 19:16:16,109 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-08-12 19:16:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:16,109 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-08-12 19:16:16,109 INFO L483 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) [2021-08-12 19:16:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-08-12 19:16:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:16,109 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:16,109 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:16,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-08-12 19:16:16,110 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:16,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1371120940, now seen corresponding path program 81 times [2021-08-12 19:16:16,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:16,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132202120] [2021-08-12 19:16:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:16,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:16,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132202120] [2021-08-12 19:16:16,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132202120] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:16,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:16,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519364703] [2021-08-12 19:16:16,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:16,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:16,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:16,156 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) [2021-08-12 19:16:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:17,343 INFO L93 Difference]: Finished difference Result 431 states and 1165 transitions. [2021-08-12 19:16:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:17,343 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 [2021-08-12 19:16:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:17,345 INFO L225 Difference]: With dead ends: 431 [2021-08-12 19:16:17,345 INFO L226 Difference]: Without dead ends: 414 [2021-08-12 19:16:17,345 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-12 19:16:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 196. [2021-08-12 19:16:17,445 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) [2021-08-12 19:16:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-08-12 19:16:17,446 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-08-12 19:16:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:17,446 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-08-12 19:16:17,446 INFO L483 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) [2021-08-12 19:16:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-08-12 19:16:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:17,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:17,447 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:17,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-08-12 19:16:17,447 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1608879492, now seen corresponding path program 82 times [2021-08-12 19:16:17,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:17,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686221431] [2021-08-12 19:16:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:17,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:17,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686221431] [2021-08-12 19:16:17,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686221431] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:17,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:17,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:17,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114550915] [2021-08-12 19:16:17,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:17,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:17,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:17,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:17,487 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) [2021-08-12 19:16:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:18,825 INFO L93 Difference]: Finished difference Result 453 states and 1226 transitions. [2021-08-12 19:16:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:18,825 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 [2021-08-12 19:16:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:18,827 INFO L225 Difference]: With dead ends: 453 [2021-08-12 19:16:18,827 INFO L226 Difference]: Without dead ends: 436 [2021-08-12 19:16:18,827 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-12 19:16:18,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 199. [2021-08-12 19:16:18,935 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) [2021-08-12 19:16:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-08-12 19:16:18,936 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-08-12 19:16:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:18,936 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-08-12 19:16:18,936 INFO L483 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) [2021-08-12 19:16:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-08-12 19:16:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:18,936 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:18,936 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:18,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-12 19:16:18,936 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1467452444, now seen corresponding path program 83 times [2021-08-12 19:16:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:18,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089744096] [2021-08-12 19:16:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:18,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:18,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089744096] [2021-08-12 19:16:18,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089744096] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:18,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:18,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:18,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628838133] [2021-08-12 19:16:18,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:18,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:18,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:18,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:18,980 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) [2021-08-12 19:16:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:20,354 INFO L93 Difference]: Finished difference Result 457 states and 1232 transitions. [2021-08-12 19:16:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:20,355 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 [2021-08-12 19:16:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:20,356 INFO L225 Difference]: With dead ends: 457 [2021-08-12 19:16:20,356 INFO L226 Difference]: Without dead ends: 440 [2021-08-12 19:16:20,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-12 19:16:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 197. [2021-08-12 19:16:20,463 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) [2021-08-12 19:16:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-08-12 19:16:20,463 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-08-12 19:16:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:20,464 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-08-12 19:16:20,464 INFO L483 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) [2021-08-12 19:16:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-08-12 19:16:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:20,464 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:20,464 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:20,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-12 19:16:20,464 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash -619818944, now seen corresponding path program 84 times [2021-08-12 19:16:20,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:20,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632755722] [2021-08-12 19:16:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:20,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:20,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632755722] [2021-08-12 19:16:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632755722] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:20,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:20,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:20,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842989778] [2021-08-12 19:16:20,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:20,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:20,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:20,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:20,511 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) [2021-08-12 19:16:21,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:21,808 INFO L93 Difference]: Finished difference Result 424 states and 1160 transitions. [2021-08-12 19:16:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:21,809 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 [2021-08-12 19:16:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:21,810 INFO L225 Difference]: With dead ends: 424 [2021-08-12 19:16:21,810 INFO L226 Difference]: Without dead ends: 407 [2021-08-12 19:16:21,810 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-12 19:16:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 200. [2021-08-12 19:16:21,918 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) [2021-08-12 19:16:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-08-12 19:16:21,919 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-08-12 19:16:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:21,919 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-08-12 19:16:21,919 INFO L483 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) [2021-08-12 19:16:21,919 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-08-12 19:16:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:21,919 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:21,920 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:21,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-08-12 19:16:21,920 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:21,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1790007940, now seen corresponding path program 85 times [2021-08-12 19:16:21,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:21,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467809862] [2021-08-12 19:16:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:21,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467809862] [2021-08-12 19:16:21,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467809862] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:21,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:21,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:21,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686999490] [2021-08-12 19:16:21,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:21,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:21,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:21,965 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) [2021-08-12 19:16:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:23,186 INFO L93 Difference]: Finished difference Result 408 states and 1137 transitions. [2021-08-12 19:16:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:23,187 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 [2021-08-12 19:16:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:23,188 INFO L225 Difference]: With dead ends: 408 [2021-08-12 19:16:23,188 INFO L226 Difference]: Without dead ends: 391 [2021-08-12 19:16:23,188 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-12 19:16:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 197. [2021-08-12 19:16:23,297 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) [2021-08-12 19:16:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-08-12 19:16:23,298 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-08-12 19:16:23,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:23,298 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-08-12 19:16:23,298 INFO L483 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) [2021-08-12 19:16:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-08-12 19:16:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:23,298 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:23,298 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:23,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-08-12 19:16:23,299 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1806944992, now seen corresponding path program 86 times [2021-08-12 19:16:23,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:23,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745787722] [2021-08-12 19:16:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:23,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:23,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745787722] [2021-08-12 19:16:23,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745787722] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:23,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:23,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:23,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007939376] [2021-08-12 19:16:23,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:23,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:23,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:23,342 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) [2021-08-12 19:16:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:24,729 INFO L93 Difference]: Finished difference Result 442 states and 1207 transitions. [2021-08-12 19:16:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:24,730 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 [2021-08-12 19:16:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:24,731 INFO L225 Difference]: With dead ends: 442 [2021-08-12 19:16:24,731 INFO L226 Difference]: Without dead ends: 425 [2021-08-12 19:16:24,731 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-08-12 19:16:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-08-12 19:16:24,845 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) [2021-08-12 19:16:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-08-12 19:16:24,846 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-08-12 19:16:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:24,847 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-08-12 19:16:24,847 INFO L483 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) [2021-08-12 19:16:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-08-12 19:16:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:24,847 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:24,847 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:24,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-08-12 19:16:24,847 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:24,847 INFO L82 PathProgramCache]: Analyzing trace with hash -666661156, now seen corresponding path program 87 times [2021-08-12 19:16:24,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:24,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963609534] [2021-08-12 19:16:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:24,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:24,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963609534] [2021-08-12 19:16:24,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963609534] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:24,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:24,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:24,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285549577] [2021-08-12 19:16:24,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:24,891 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) [2021-08-12 19:16:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:26,191 INFO L93 Difference]: Finished difference Result 421 states and 1169 transitions. [2021-08-12 19:16:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:26,192 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 [2021-08-12 19:16:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:26,193 INFO L225 Difference]: With dead ends: 421 [2021-08-12 19:16:26,193 INFO L226 Difference]: Without dead ends: 404 [2021-08-12 19:16:26,193 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-12 19:16:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 196. [2021-08-12 19:16:26,308 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) [2021-08-12 19:16:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-08-12 19:16:26,309 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-08-12 19:16:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:26,309 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-08-12 19:16:26,309 INFO L483 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) [2021-08-12 19:16:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-08-12 19:16:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:26,309 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:26,309 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:26,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-08-12 19:16:26,310 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:26,310 INFO L82 PathProgramCache]: Analyzing trace with hash 201773648, now seen corresponding path program 88 times [2021-08-12 19:16:26,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:26,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921552904] [2021-08-12 19:16:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:26,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:26,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921552904] [2021-08-12 19:16:26,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921552904] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:26,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:26,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:26,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775348375] [2021-08-12 19:16:26,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:26,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:26,388 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) [2021-08-12 19:16:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:27,558 INFO L93 Difference]: Finished difference Result 384 states and 1054 transitions. [2021-08-12 19:16:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:27,558 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 [2021-08-12 19:16:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:27,559 INFO L225 Difference]: With dead ends: 384 [2021-08-12 19:16:27,559 INFO L226 Difference]: Without dead ends: 367 [2021-08-12 19:16:27,559 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-12 19:16:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 198. [2021-08-12 19:16:27,676 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) [2021-08-12 19:16:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-08-12 19:16:27,677 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-08-12 19:16:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:27,677 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-08-12 19:16:27,678 INFO L483 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) [2021-08-12 19:16:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-08-12 19:16:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:27,678 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:27,678 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:27,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-12 19:16:27,678 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1159324884, now seen corresponding path program 89 times [2021-08-12 19:16:27,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:27,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924100516] [2021-08-12 19:16:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:27,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924100516] [2021-08-12 19:16:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924100516] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:27,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:27,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:27,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090622369] [2021-08-12 19:16:27,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:27,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:27,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:27,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:27,723 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) [2021-08-12 19:16:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:28,962 INFO L93 Difference]: Finished difference Result 385 states and 1065 transitions. [2021-08-12 19:16:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:28,963 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 [2021-08-12 19:16:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:28,964 INFO L225 Difference]: With dead ends: 385 [2021-08-12 19:16:28,964 INFO L226 Difference]: Without dead ends: 368 [2021-08-12 19:16:28,964 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-12 19:16:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 200. [2021-08-12 19:16:29,082 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) [2021-08-12 19:16:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-08-12 19:16:29,083 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-08-12 19:16:29,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:29,083 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-08-12 19:16:29,083 INFO L483 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) [2021-08-12 19:16:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-08-12 19:16:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:16:29,083 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:29,083 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:29,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-08-12 19:16:29,083 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1995358576, now seen corresponding path program 90 times [2021-08-12 19:16:29,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:29,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057632818] [2021-08-12 19:16:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:29,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:29,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057632818] [2021-08-12 19:16:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057632818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:29,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:29,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:16:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948435804] [2021-08-12 19:16:29,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:16:29,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:29,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:16:29,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:16:29,123 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) [2021-08-12 19:16:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:30,248 INFO L93 Difference]: Finished difference Result 364 states and 1027 transitions. [2021-08-12 19:16:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:30,249 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 [2021-08-12 19:16:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:30,250 INFO L225 Difference]: With dead ends: 364 [2021-08-12 19:16:30,250 INFO L226 Difference]: Without dead ends: 347 [2021-08-12 19:16:30,250 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-08-12 19:16:30,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2021-08-12 19:16:30,369 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) [2021-08-12 19:16:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-08-12 19:16:30,370 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-08-12 19:16:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:30,370 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-08-12 19:16:30,370 INFO L483 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) [2021-08-12 19:16:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-08-12 19:16:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:30,370 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:30,370 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:30,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-08-12 19:16:30,370 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1303103675, now seen corresponding path program 1 times [2021-08-12 19:16:30,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:30,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805993234] [2021-08-12 19:16:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:30,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:30,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805993234] [2021-08-12 19:16:30,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805993234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:30,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108142678] [2021-08-12 19:16:30,412 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 [2021-08-12 19:16:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:30,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:30,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108142678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:30,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:30,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:16:30,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216114249] [2021-08-12 19:16:30,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:16:30,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:30,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:16:30,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:30,574 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) [2021-08-12 19:16:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:31,890 INFO L93 Difference]: Finished difference Result 365 states and 1033 transitions. [2021-08-12 19:16:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:31,890 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 [2021-08-12 19:16:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:31,899 INFO L225 Difference]: With dead ends: 365 [2021-08-12 19:16:31,899 INFO L226 Difference]: Without dead ends: 344 [2021-08-12 19:16:31,899 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:16:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-12 19:16:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-08-12 19:16:32,032 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) [2021-08-12 19:16:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-08-12 19:16:32,033 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 18 [2021-08-12 19:16:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:32,033 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-08-12 19:16:32,033 INFO L483 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) [2021-08-12 19:16:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-08-12 19:16:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:32,034 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:32,034 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:32,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-12 19:16:32,241 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:32,242 INFO L82 PathProgramCache]: Analyzing trace with hash -95550603, now seen corresponding path program 2 times [2021-08-12 19:16:32,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:32,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214072425] [2021-08-12 19:16:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:32,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:32,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214072425] [2021-08-12 19:16:32,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214072425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:32,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441275758] [2021-08-12 19:16:32,291 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 [2021-08-12 19:16:32,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:16:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:32,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:32,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441275758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:32,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:32,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:16:32,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006626587] [2021-08-12 19:16:32,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:16:32,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:32,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:16:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:16:32,416 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) [2021-08-12 19:16:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:33,778 INFO L93 Difference]: Finished difference Result 407 states and 1141 transitions. [2021-08-12 19:16:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:33,778 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 [2021-08-12 19:16:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:33,780 INFO L225 Difference]: With dead ends: 407 [2021-08-12 19:16:33,780 INFO L226 Difference]: Without dead ends: 386 [2021-08-12 19:16:33,780 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:16:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-12 19:16:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 214. [2021-08-12 19:16:33,913 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) [2021-08-12 19:16:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 640 transitions. [2021-08-12 19:16:33,914 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 640 transitions. Word has length 18 [2021-08-12 19:16:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:33,914 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 640 transitions. [2021-08-12 19:16:33,914 INFO L483 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) [2021-08-12 19:16:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 640 transitions. [2021-08-12 19:16:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:33,915 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:33,915 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:34,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:16:34,121 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1794270991, now seen corresponding path program 3 times [2021-08-12 19:16:34,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:34,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679818297] [2021-08-12 19:16:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:34,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:34,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679818297] [2021-08-12 19:16:34,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679818297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:34,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786771492] [2021-08-12 19:16:34,180 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:16:34,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:16:34,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:34,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:34,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:34,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786771492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:34,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:34,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:16:34,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930751959] [2021-08-12 19:16:34,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:16:34,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:16:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:34,276 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) [2021-08-12 19:16:35,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:35,593 INFO L93 Difference]: Finished difference Result 386 states and 1095 transitions. [2021-08-12 19:16:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:35,594 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 [2021-08-12 19:16:35,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:35,595 INFO L225 Difference]: With dead ends: 386 [2021-08-12 19:16:35,595 INFO L226 Difference]: Without dead ends: 365 [2021-08-12 19:16:35,595 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:16:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-12 19:16:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 206. [2021-08-12 19:16:35,729 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) [2021-08-12 19:16:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 608 transitions. [2021-08-12 19:16:35,730 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 608 transitions. Word has length 18 [2021-08-12 19:16:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:35,730 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 608 transitions. [2021-08-12 19:16:35,730 INFO L483 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) [2021-08-12 19:16:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 608 transitions. [2021-08-12 19:16:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:35,731 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:35,731 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:35,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-12 19:16:35,945 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:35,945 INFO L82 PathProgramCache]: Analyzing trace with hash -605004921, now seen corresponding path program 4 times [2021-08-12 19:16:35,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:35,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377212808] [2021-08-12 19:16:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:35,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:35,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377212808] [2021-08-12 19:16:35,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377212808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:35,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794359371] [2021-08-12 19:16:35,985 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 [2021-08-12 19:16:36,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:16:36,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:36,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:36,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:36,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794359371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:36,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:36,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:16:36,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063530124] [2021-08-12 19:16:36,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:16:36,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:36,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:16:36,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:36,084 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) [2021-08-12 19:16:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:37,282 INFO L93 Difference]: Finished difference Result 397 states and 1128 transitions. [2021-08-12 19:16:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:37,282 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 [2021-08-12 19:16:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:37,283 INFO L225 Difference]: With dead ends: 397 [2021-08-12 19:16:37,283 INFO L226 Difference]: Without dead ends: 376 [2021-08-12 19:16:37,284 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:16:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-08-12 19:16:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 212. [2021-08-12 19:16:37,417 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) [2021-08-12 19:16:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 631 transitions. [2021-08-12 19:16:37,418 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 631 transitions. Word has length 18 [2021-08-12 19:16:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:37,418 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 631 transitions. [2021-08-12 19:16:37,418 INFO L483 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) [2021-08-12 19:16:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 631 transitions. [2021-08-12 19:16:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:37,418 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:37,418 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:37,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-12 19:16:37,633 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash -630780405, now seen corresponding path program 5 times [2021-08-12 19:16:37,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:37,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782550916] [2021-08-12 19:16:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:37,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:37,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782550916] [2021-08-12 19:16:37,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782550916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:37,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442140730] [2021-08-12 19:16:37,674 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 [2021-08-12 19:16:37,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:16:37,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:37,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:37,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:37,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442140730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:37,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:37,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:16:37,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403873128] [2021-08-12 19:16:37,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:16:37,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:37,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:16:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:16:37,772 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) [2021-08-12 19:16:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:39,187 INFO L93 Difference]: Finished difference Result 439 states and 1237 transitions. [2021-08-12 19:16:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:39,188 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 [2021-08-12 19:16:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:39,189 INFO L225 Difference]: With dead ends: 439 [2021-08-12 19:16:39,189 INFO L226 Difference]: Without dead ends: 418 [2021-08-12 19:16:39,189 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:16:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-12 19:16:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 216. [2021-08-12 19:16:39,335 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) [2021-08-12 19:16:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 651 transitions. [2021-08-12 19:16:39,336 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 651 transitions. Word has length 18 [2021-08-12 19:16:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:39,336 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 651 transitions. [2021-08-12 19:16:39,336 INFO L483 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) [2021-08-12 19:16:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 651 transitions. [2021-08-12 19:16:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:39,337 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:39,337 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:39,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 19:16:39,553 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1965466503, now seen corresponding path program 6 times [2021-08-12 19:16:39,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:39,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335516600] [2021-08-12 19:16:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:39,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335516600] [2021-08-12 19:16:39,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335516600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086472339] [2021-08-12 19:16:39,595 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 [2021-08-12 19:16:39,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:16:39,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:39,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:39,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086472339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:39,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:39,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:16:39,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330372201] [2021-08-12 19:16:39,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:16:39,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:16:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:16:39,679 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) [2021-08-12 19:16:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:40,962 INFO L93 Difference]: Finished difference Result 410 states and 1171 transitions. [2021-08-12 19:16:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:40,963 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 [2021-08-12 19:16:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:40,964 INFO L225 Difference]: With dead ends: 410 [2021-08-12 19:16:40,964 INFO L226 Difference]: Without dead ends: 389 [2021-08-12 19:16:40,964 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:16:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-12 19:16:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 202. [2021-08-12 19:16:41,098 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) [2021-08-12 19:16:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 604 transitions. [2021-08-12 19:16:41,099 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 604 transitions. Word has length 18 [2021-08-12 19:16:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:41,099 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 604 transitions. [2021-08-12 19:16:41,099 INFO L483 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) [2021-08-12 19:16:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 604 transitions. [2021-08-12 19:16:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:41,099 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:41,100 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:41,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:16:41,313 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash -725187835, now seen corresponding path program 1 times [2021-08-12 19:16:41,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:41,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940484375] [2021-08-12 19:16:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:41,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:41,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940484375] [2021-08-12 19:16:41,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940484375] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:41,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:41,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:16:41,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696767873] [2021-08-12 19:16:41,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:16:41,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:16:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:16:41,366 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) [2021-08-12 19:16:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:42,582 INFO L93 Difference]: Finished difference Result 426 states and 1197 transitions. [2021-08-12 19:16:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:16:42,583 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 [2021-08-12 19:16:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:42,584 INFO L225 Difference]: With dead ends: 426 [2021-08-12 19:16:42,584 INFO L226 Difference]: Without dead ends: 366 [2021-08-12 19:16:42,584 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:16:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-08-12 19:16:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 252. [2021-08-12 19:16:42,743 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) [2021-08-12 19:16:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 736 transitions. [2021-08-12 19:16:42,745 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 736 transitions. Word has length 18 [2021-08-12 19:16:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:42,745 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 736 transitions. [2021-08-12 19:16:42,745 INFO L483 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) [2021-08-12 19:16:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 736 transitions. [2021-08-12 19:16:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:42,745 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:42,745 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:42,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-12 19:16:42,745 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:42,746 INFO L82 PathProgramCache]: Analyzing trace with hash -809235458, now seen corresponding path program 1 times [2021-08-12 19:16:42,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:42,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815279743] [2021-08-12 19:16:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:42,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:42,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815279743] [2021-08-12 19:16:42,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815279743] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:42,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:42,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:16:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041197149] [2021-08-12 19:16:42,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:16:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:42,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:16:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:16:42,799 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) [2021-08-12 19:16:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:44,131 INFO L93 Difference]: Finished difference Result 447 states and 1247 transitions. [2021-08-12 19:16:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:16:44,131 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 [2021-08-12 19:16:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:44,132 INFO L225 Difference]: With dead ends: 447 [2021-08-12 19:16:44,132 INFO L226 Difference]: Without dead ends: 358 [2021-08-12 19:16:44,133 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:16:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-12 19:16:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 269. [2021-08-12 19:16:44,309 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) [2021-08-12 19:16:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 783 transitions. [2021-08-12 19:16:44,310 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 783 transitions. Word has length 18 [2021-08-12 19:16:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:44,310 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 783 transitions. [2021-08-12 19:16:44,310 INFO L483 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) [2021-08-12 19:16:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 783 transitions. [2021-08-12 19:16:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:44,310 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:44,315 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:44,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-08-12 19:16:44,316 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash -966424801, now seen corresponding path program 7 times [2021-08-12 19:16:44,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:44,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059577118] [2021-08-12 19:16:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:44,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:44,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059577118] [2021-08-12 19:16:44,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059577118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:44,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513766553] [2021-08-12 19:16:44,354 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 [2021-08-12 19:16:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:44,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:44,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513766553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:44,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:44,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:16:44,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326797807] [2021-08-12 19:16:44,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:16:44,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:44,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:16:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:44,566 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) [2021-08-12 19:16:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:46,328 INFO L93 Difference]: Finished difference Result 565 states and 1580 transitions. [2021-08-12 19:16:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:46,328 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 [2021-08-12 19:16:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:46,330 INFO L225 Difference]: With dead ends: 565 [2021-08-12 19:16:46,330 INFO L226 Difference]: Without dead ends: 544 [2021-08-12 19:16:46,331 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:16:46,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-12 19:16:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 278. [2021-08-12 19:16:46,515 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) [2021-08-12 19:16:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 821 transitions. [2021-08-12 19:16:46,516 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 821 transitions. Word has length 18 [2021-08-12 19:16:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:46,516 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 821 transitions. [2021-08-12 19:16:46,516 INFO L483 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) [2021-08-12 19:16:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 821 transitions. [2021-08-12 19:16:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:46,517 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:46,517 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:46,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-12 19:16:46,732 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash 241128271, now seen corresponding path program 8 times [2021-08-12 19:16:46,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:46,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294815575] [2021-08-12 19:16:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:46,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:46,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294815575] [2021-08-12 19:16:46,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294815575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:46,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176927366] [2021-08-12 19:16:46,778 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 [2021-08-12 19:16:46,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:16:46,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:46,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:46,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:46,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176927366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:46,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:46,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:16:46,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742470306] [2021-08-12 19:16:46,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:16:46,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:16:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:16:46,893 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) [2021-08-12 19:16:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:48,622 INFO L93 Difference]: Finished difference Result 541 states and 1541 transitions. [2021-08-12 19:16:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:48,623 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 [2021-08-12 19:16:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:48,625 INFO L225 Difference]: With dead ends: 541 [2021-08-12 19:16:48,625 INFO L226 Difference]: Without dead ends: 520 [2021-08-12 19:16:48,626 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:16:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-12 19:16:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 282. [2021-08-12 19:16:48,809 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) [2021-08-12 19:16:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 841 transitions. [2021-08-12 19:16:48,810 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 841 transitions. Word has length 18 [2021-08-12 19:16:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:48,810 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 841 transitions. [2021-08-12 19:16:48,810 INFO L483 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) [2021-08-12 19:16:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 841 transitions. [2021-08-12 19:16:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:48,811 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:48,811 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:49,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-12 19:16:49,027 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1457592117, now seen corresponding path program 9 times [2021-08-12 19:16:49,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:49,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755528004] [2021-08-12 19:16:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:49,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:49,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755528004] [2021-08-12 19:16:49,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755528004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:49,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704454977] [2021-08-12 19:16:49,067 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 [2021-08-12 19:16:49,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:16:49,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:49,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:49,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704454977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:49,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:49,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:16:49,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205993075] [2021-08-12 19:16:49,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:16:49,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:16:49,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:49,201 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) [2021-08-12 19:16:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:50,995 INFO L93 Difference]: Finished difference Result 551 states and 1566 transitions. [2021-08-12 19:16:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:50,995 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 [2021-08-12 19:16:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:50,997 INFO L225 Difference]: With dead ends: 551 [2021-08-12 19:16:50,997 INFO L226 Difference]: Without dead ends: 530 [2021-08-12 19:16:50,997 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:16:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-08-12 19:16:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 271. [2021-08-12 19:16:51,177 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) [2021-08-12 19:16:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 793 transitions. [2021-08-12 19:16:51,179 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 793 transitions. Word has length 18 [2021-08-12 19:16:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:51,179 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 793 transitions. [2021-08-12 19:16:51,179 INFO L483 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) [2021-08-12 19:16:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 793 transitions. [2021-08-12 19:16:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:51,179 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:51,179 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:51,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:16:51,396 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:51,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1254344866, now seen corresponding path program 2 times [2021-08-12 19:16:51,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:51,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168420957] [2021-08-12 19:16:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:51,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:51,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168420957] [2021-08-12 19:16:51,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168420957] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:16:51,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:16:51,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:16:51,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555897919] [2021-08-12 19:16:51,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:16:51,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:51,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:16:51,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:16:51,440 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) [2021-08-12 19:16:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:53,114 INFO L93 Difference]: Finished difference Result 530 states and 1476 transitions. [2021-08-12 19:16:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:16:53,114 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 [2021-08-12 19:16:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:53,115 INFO L225 Difference]: With dead ends: 530 [2021-08-12 19:16:53,115 INFO L226 Difference]: Without dead ends: 457 [2021-08-12 19:16:53,116 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:16:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-08-12 19:16:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-08-12 19:16:53,304 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) [2021-08-12 19:16:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 850 transitions. [2021-08-12 19:16:53,305 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 850 transitions. Word has length 18 [2021-08-12 19:16:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:53,306 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 850 transitions. [2021-08-12 19:16:53,306 INFO L483 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) [2021-08-12 19:16:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 850 transitions. [2021-08-12 19:16:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:53,306 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:53,306 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:53,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-08-12 19:16:53,306 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:53,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:53,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1663824377, now seen corresponding path program 10 times [2021-08-12 19:16:53,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:53,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095662725] [2021-08-12 19:16:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:53,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095662725] [2021-08-12 19:16:53,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095662725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234445268] [2021-08-12 19:16:53,355 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 [2021-08-12 19:16:53,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:16:53,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:53,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234445268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:53,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:53,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:16:53,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923595495] [2021-08-12 19:16:53,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:16:53,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:53,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:16:53,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:16:53,466 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) [2021-08-12 19:16:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:55,029 INFO L93 Difference]: Finished difference Result 475 states and 1331 transitions. [2021-08-12 19:16:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:55,030 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 [2021-08-12 19:16:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:55,031 INFO L225 Difference]: With dead ends: 475 [2021-08-12 19:16:55,031 INFO L226 Difference]: Without dead ends: 454 [2021-08-12 19:16:55,031 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:16:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-12 19:16:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 291. [2021-08-12 19:16:55,226 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) [2021-08-12 19:16:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-08-12 19:16:55,227 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 18 [2021-08-12 19:16:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:55,227 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-08-12 19:16:55,227 INFO L483 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) [2021-08-12 19:16:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-08-12 19:16:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:55,227 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:55,227 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:55,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-12 19:16:55,444 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1866597709, now seen corresponding path program 11 times [2021-08-12 19:16:55,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:55,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048825482] [2021-08-12 19:16:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:55,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048825482] [2021-08-12 19:16:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048825482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018494618] [2021-08-12 19:16:55,488 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 [2021-08-12 19:16:55,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:16:55,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:55,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018494618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:55,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:55,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:16:55,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075078741] [2021-08-12 19:16:55,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:16:55,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:55,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:16:55,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:55,600 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) [2021-08-12 19:16:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:57,089 INFO L93 Difference]: Finished difference Result 433 states and 1221 transitions. [2021-08-12 19:16:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:57,089 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 [2021-08-12 19:16:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:57,091 INFO L225 Difference]: With dead ends: 433 [2021-08-12 19:16:57,091 INFO L226 Difference]: Without dead ends: 408 [2021-08-12 19:16:57,091 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:16:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-08-12 19:16:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 299. [2021-08-12 19:16:57,300 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) [2021-08-12 19:16:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 884 transitions. [2021-08-12 19:16:57,301 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 884 transitions. Word has length 18 [2021-08-12 19:16:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:57,301 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 884 transitions. [2021-08-12 19:16:57,302 INFO L483 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) [2021-08-12 19:16:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 884 transitions. [2021-08-12 19:16:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:57,302 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:57,302 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:57,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-12 19:16:57,519 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash -752125083, now seen corresponding path program 2 times [2021-08-12 19:16:57,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:57,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731267419] [2021-08-12 19:16:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:57,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:57,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731267419] [2021-08-12 19:16:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731267419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:57,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602323700] [2021-08-12 19:16:57,556 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:16:57,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:16:57,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:16:57,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:57,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602323700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:57,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:57,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:16:57,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398223153] [2021-08-12 19:16:57,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:16:57,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:57,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:16:57,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:57,669 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) [2021-08-12 19:16:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:59,282 INFO L93 Difference]: Finished difference Result 473 states and 1315 transitions. [2021-08-12 19:16:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:16:59,283 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 [2021-08-12 19:16:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:59,284 INFO L225 Difference]: With dead ends: 473 [2021-08-12 19:16:59,284 INFO L226 Difference]: Without dead ends: 449 [2021-08-12 19:16:59,285 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:16:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-12 19:16:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 301. [2021-08-12 19:16:59,498 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) [2021-08-12 19:16:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 891 transitions. [2021-08-12 19:16:59,499 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 891 transitions. Word has length 18 [2021-08-12 19:16:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:59,500 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 891 transitions. [2021-08-12 19:16:59,500 INFO L483 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) [2021-08-12 19:16:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 891 transitions. [2021-08-12 19:16:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:16:59,500 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:59,500 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:59,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:16:59,718 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:59,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1213009967, now seen corresponding path program 12 times [2021-08-12 19:16:59,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:59,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158461799] [2021-08-12 19:16:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:59,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:59,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158461799] [2021-08-12 19:16:59,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158461799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:59,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887323238] [2021-08-12 19:16:59,794 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:16:59,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:16:59,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:16:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:59,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887323238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:59,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:59,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:16:59,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115521045] [2021-08-12 19:16:59,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:16:59,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:16:59,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:16:59,946 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) [2021-08-12 19:17:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:01,388 INFO L93 Difference]: Finished difference Result 419 states and 1198 transitions. [2021-08-12 19:17:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:01,389 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 [2021-08-12 19:17:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:01,390 INFO L225 Difference]: With dead ends: 419 [2021-08-12 19:17:01,390 INFO L226 Difference]: Without dead ends: 398 [2021-08-12 19:17:01,391 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:17:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-08-12 19:17:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 295. [2021-08-12 19:17:01,591 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) [2021-08-12 19:17:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-08-12 19:17:01,593 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-08-12 19:17:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:01,593 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-08-12 19:17:01,593 INFO L483 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) [2021-08-12 19:17:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-08-12 19:17:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:01,593 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:01,593 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:01,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-12 19:17:01,810 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:01,810 INFO L82 PathProgramCache]: Analyzing trace with hash 303490843, now seen corresponding path program 3 times [2021-08-12 19:17:01,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:01,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756637275] [2021-08-12 19:17:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:01,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:01,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756637275] [2021-08-12 19:17:01,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756637275] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:17:01,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:17:01,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:17:01,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517639093] [2021-08-12 19:17:01,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:17:01,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:01,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:17:01,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:17:01,873 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) [2021-08-12 19:17:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:03,390 INFO L93 Difference]: Finished difference Result 443 states and 1244 transitions. [2021-08-12 19:17:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:03,390 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 [2021-08-12 19:17:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:03,391 INFO L225 Difference]: With dead ends: 443 [2021-08-12 19:17:03,392 INFO L226 Difference]: Without dead ends: 412 [2021-08-12 19:17:03,392 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-12 19:17:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 295. [2021-08-12 19:17:03,599 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) [2021-08-12 19:17:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-08-12 19:17:03,601 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-08-12 19:17:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:03,601 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-08-12 19:17:03,601 INFO L483 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) [2021-08-12 19:17:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-08-12 19:17:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:03,601 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:03,601 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:03,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-08-12 19:17:03,601 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:03,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1861527460, now seen corresponding path program 3 times [2021-08-12 19:17:03,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:03,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926498117] [2021-08-12 19:17:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:03,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:03,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926498117] [2021-08-12 19:17:03,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926498117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:03,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802075863] [2021-08-12 19:17:03,631 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 [2021-08-12 19:17:03,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:17:03,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:17:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:03,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802075863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:03,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:03,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-12 19:17:03,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681382797] [2021-08-12 19:17:03,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:17:03,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:17:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:17:03,740 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) [2021-08-12 19:17:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:05,189 INFO L93 Difference]: Finished difference Result 460 states and 1292 transitions. [2021-08-12 19:17:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:17:05,190 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 [2021-08-12 19:17:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:05,191 INFO L225 Difference]: With dead ends: 460 [2021-08-12 19:17:05,191 INFO L226 Difference]: Without dead ends: 401 [2021-08-12 19:17:05,192 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-12 19:17:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 292. [2021-08-12 19:17:05,408 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) [2021-08-12 19:17:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 864 transitions. [2021-08-12 19:17:05,410 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 864 transitions. Word has length 18 [2021-08-12 19:17:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:05,410 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 864 transitions. [2021-08-12 19:17:05,410 INFO L483 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) [2021-08-12 19:17:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 864 transitions. [2021-08-12 19:17:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:05,410 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:05,410 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:05,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:05,622 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:05,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1997185865, now seen corresponding path program 13 times [2021-08-12 19:17:05,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:05,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348642940] [2021-08-12 19:17:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:05,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348642940] [2021-08-12 19:17:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348642940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476157129] [2021-08-12 19:17:05,674 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) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:05,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476157129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:05,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:05,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:17:05,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383793783] [2021-08-12 19:17:05,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:05,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:05,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:05,773 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) [2021-08-12 19:17:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:07,511 INFO L93 Difference]: Finished difference Result 493 states and 1395 transitions. [2021-08-12 19:17:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:07,511 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 [2021-08-12 19:17:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:07,513 INFO L225 Difference]: With dead ends: 493 [2021-08-12 19:17:07,513 INFO L226 Difference]: Without dead ends: 472 [2021-08-12 19:17:07,513 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:17:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-12 19:17:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 298. [2021-08-12 19:17:07,722 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) [2021-08-12 19:17:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 892 transitions. [2021-08-12 19:17:07,724 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 892 transitions. Word has length 18 [2021-08-12 19:17:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:07,724 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 892 transitions. [2021-08-12 19:17:07,724 INFO L483 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) [2021-08-12 19:17:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 892 transitions. [2021-08-12 19:17:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:07,724 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:07,724 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:07,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:07,940 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1067024689, now seen corresponding path program 14 times [2021-08-12 19:17:07,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:07,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850592307] [2021-08-12 19:17:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:07,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:07,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850592307] [2021-08-12 19:17:07,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850592307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:07,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658898388] [2021-08-12 19:17:07,982 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 [2021-08-12 19:17:08,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:17:08,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:08,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:08,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658898388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:08,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:08,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:17:08,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196317156] [2021-08-12 19:17:08,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:17:08,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:08,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:17:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:17:08,116 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) [2021-08-12 19:17:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:09,801 INFO L93 Difference]: Finished difference Result 481 states and 1355 transitions. [2021-08-12 19:17:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:09,801 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 [2021-08-12 19:17:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:09,803 INFO L225 Difference]: With dead ends: 481 [2021-08-12 19:17:09,803 INFO L226 Difference]: Without dead ends: 456 [2021-08-12 19:17:09,803 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:17:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-12 19:17:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-08-12 19:17:10,016 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) [2021-08-12 19:17:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 898 transitions. [2021-08-12 19:17:10,017 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 898 transitions. Word has length 18 [2021-08-12 19:17:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:10,018 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 898 transitions. [2021-08-12 19:17:10,018 INFO L483 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) [2021-08-12 19:17:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 898 transitions. [2021-08-12 19:17:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:10,018 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:10,018 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:10,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-12 19:17:10,221 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:10,222 INFO L82 PathProgramCache]: Analyzing trace with hash -435848983, now seen corresponding path program 4 times [2021-08-12 19:17:10,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:10,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240737598] [2021-08-12 19:17:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:10,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:10,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240737598] [2021-08-12 19:17:10,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240737598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:10,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008712473] [2021-08-12 19:17:10,265 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 [2021-08-12 19:17:10,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:17:10,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:10,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:17:10,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:10,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008712473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:10,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:10,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-12 19:17:10,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040082315] [2021-08-12 19:17:10,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:17:10,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:10,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:17:10,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:17:10,339 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) [2021-08-12 19:17:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:12,164 INFO L93 Difference]: Finished difference Result 568 states and 1647 transitions. [2021-08-12 19:17:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:17:12,164 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 [2021-08-12 19:17:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:12,166 INFO L225 Difference]: With dead ends: 568 [2021-08-12 19:17:12,166 INFO L226 Difference]: Without dead ends: 517 [2021-08-12 19:17:12,166 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:17:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-12 19:17:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-08-12 19:17:12,384 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) [2021-08-12 19:17:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 943 transitions. [2021-08-12 19:17:12,386 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 943 transitions. Word has length 18 [2021-08-12 19:17:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:12,386 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 943 transitions. [2021-08-12 19:17:12,386 INFO L483 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) [2021-08-12 19:17:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 943 transitions. [2021-08-12 19:17:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:12,387 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:12,387 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:12,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:12,589 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1726676173, now seen corresponding path program 15 times [2021-08-12 19:17:12,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:12,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726394957] [2021-08-12 19:17:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:12,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:12,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726394957] [2021-08-12 19:17:12,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726394957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:12,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352204043] [2021-08-12 19:17:12,641 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 [2021-08-12 19:17:12,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:17:12,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:12,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:12,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:12,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352204043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:12,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:12,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:17:12,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329531738] [2021-08-12 19:17:12,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:17:12,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:12,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:17:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:17:12,769 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) [2021-08-12 19:17:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:14,655 INFO L93 Difference]: Finished difference Result 518 states and 1482 transitions. [2021-08-12 19:17:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:14,656 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 [2021-08-12 19:17:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:14,657 INFO L225 Difference]: With dead ends: 518 [2021-08-12 19:17:14,657 INFO L226 Difference]: Without dead ends: 497 [2021-08-12 19:17:14,658 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:17:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-12 19:17:14,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 308. [2021-08-12 19:17:14,880 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) [2021-08-12 19:17:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 940 transitions. [2021-08-12 19:17:14,882 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 940 transitions. Word has length 18 [2021-08-12 19:17:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:14,882 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 940 transitions. [2021-08-12 19:17:14,882 INFO L483 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) [2021-08-12 19:17:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 940 transitions. [2021-08-12 19:17:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:14,882 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:14,882 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:15,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-12 19:17:15,099 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1907804621, now seen corresponding path program 16 times [2021-08-12 19:17:15,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:15,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540979505] [2021-08-12 19:17:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:15,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:15,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540979505] [2021-08-12 19:17:15,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540979505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:15,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7765428] [2021-08-12 19:17:15,139 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 [2021-08-12 19:17:15,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:17:15,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:15,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:15,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7765428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:15,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:15,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:17:15,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307687862] [2021-08-12 19:17:15,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:15,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:15,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:15,251 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) [2021-08-12 19:17:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:17,010 INFO L93 Difference]: Finished difference Result 499 states and 1453 transitions. [2021-08-12 19:17:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:17,011 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 [2021-08-12 19:17:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:17,012 INFO L225 Difference]: With dead ends: 499 [2021-08-12 19:17:17,012 INFO L226 Difference]: Without dead ends: 478 [2021-08-12 19:17:17,013 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:17:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-08-12 19:17:17,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 304. [2021-08-12 19:17:17,230 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) [2021-08-12 19:17:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-08-12 19:17:17,231 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 18 [2021-08-12 19:17:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:17,231 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-08-12 19:17:17,231 INFO L483 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) [2021-08-12 19:17:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-08-12 19:17:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:17,232 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:17,232 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:17,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:17,445 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:17,445 INFO L82 PathProgramCache]: Analyzing trace with hash 398774047, now seen corresponding path program 5 times [2021-08-12 19:17:17,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:17,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219097790] [2021-08-12 19:17:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:17,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:17,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219097790] [2021-08-12 19:17:17,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219097790] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:17:17,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:17:17,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:17:17,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695409895] [2021-08-12 19:17:17,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:17:17,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:17:17,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:17:17,485 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) [2021-08-12 19:17:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:19,203 INFO L93 Difference]: Finished difference Result 516 states and 1467 transitions. [2021-08-12 19:17:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:17:19,204 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 [2021-08-12 19:17:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:19,205 INFO L225 Difference]: With dead ends: 516 [2021-08-12 19:17:19,205 INFO L226 Difference]: Without dead ends: 452 [2021-08-12 19:17:19,206 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:17:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-12 19:17:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 296. [2021-08-12 19:17:19,420 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) [2021-08-12 19:17:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-08-12 19:17:19,422 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-08-12 19:17:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:19,422 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-08-12 19:17:19,422 INFO L483 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) [2021-08-12 19:17:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-08-12 19:17:19,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:19,422 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:19,422 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:19,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-08-12 19:17:19,423 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash 505869899, now seen corresponding path program 17 times [2021-08-12 19:17:19,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:19,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114523815] [2021-08-12 19:17:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:19,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:19,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114523815] [2021-08-12 19:17:19,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114523815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:19,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81933393] [2021-08-12 19:17:19,464 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 [2021-08-12 19:17:19,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:17:19,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:19,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81933393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:19,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:19,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:17:19,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711153906] [2021-08-12 19:17:19,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:19,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:19,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:19,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:19,581 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) [2021-08-12 19:17:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:21,196 INFO L93 Difference]: Finished difference Result 452 states and 1290 transitions. [2021-08-12 19:17:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:21,196 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 [2021-08-12 19:17:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:21,198 INFO L225 Difference]: With dead ends: 452 [2021-08-12 19:17:21,198 INFO L226 Difference]: Without dead ends: 427 [2021-08-12 19:17:21,198 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:17:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-12 19:17:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 304. [2021-08-12 19:17:21,429 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) [2021-08-12 19:17:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-08-12 19:17:21,430 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 18 [2021-08-12 19:17:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:21,430 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-08-12 19:17:21,430 INFO L483 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) [2021-08-12 19:17:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-08-12 19:17:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:21,430 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:21,431 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:21,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:21,647 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:21,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1484427343, now seen corresponding path program 18 times [2021-08-12 19:17:21,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:21,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935632019] [2021-08-12 19:17:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:21,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:21,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935632019] [2021-08-12 19:17:21,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935632019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:21,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887656165] [2021-08-12 19:17:21,691 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 [2021-08-12 19:17:21,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:17:21,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:21,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887656165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:21,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:21,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:17:21,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089595031] [2021-08-12 19:17:21,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:21,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:21,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:21,860 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) [2021-08-12 19:17:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:23,379 INFO L93 Difference]: Finished difference Result 436 states and 1260 transitions. [2021-08-12 19:17:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:23,379 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 [2021-08-12 19:17:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:23,381 INFO L225 Difference]: With dead ends: 436 [2021-08-12 19:17:23,381 INFO L226 Difference]: Without dead ends: 415 [2021-08-12 19:17:23,381 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:17:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-12 19:17:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 296. [2021-08-12 19:17:23,593 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) [2021-08-12 19:17:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-08-12 19:17:23,594 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-08-12 19:17:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:23,595 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-08-12 19:17:23,595 INFO L483 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) [2021-08-12 19:17:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-08-12 19:17:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:23,595 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:23,595 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:23,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-12 19:17:23,811 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1410127391, now seen corresponding path program 19 times [2021-08-12 19:17:23,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:23,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987875204] [2021-08-12 19:17:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:23,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:23,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987875204] [2021-08-12 19:17:23,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987875204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:23,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783443432] [2021-08-12 19:17:23,860 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 [2021-08-12 19:17:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:23,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:23,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783443432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:23,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:23,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:17:23,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027623484] [2021-08-12 19:17:23,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:17:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:23,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:17:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:17:23,972 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) [2021-08-12 19:17:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:25,520 INFO L93 Difference]: Finished difference Result 470 states and 1341 transitions. [2021-08-12 19:17:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:25,520 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 [2021-08-12 19:17:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:25,522 INFO L225 Difference]: With dead ends: 470 [2021-08-12 19:17:25,522 INFO L226 Difference]: Without dead ends: 449 [2021-08-12 19:17:25,522 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:17:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-12 19:17:25,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 302. [2021-08-12 19:17:25,730 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) [2021-08-12 19:17:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 910 transitions. [2021-08-12 19:17:25,732 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 910 transitions. Word has length 18 [2021-08-12 19:17:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:25,732 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 910 transitions. [2021-08-12 19:17:25,732 INFO L483 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) [2021-08-12 19:17:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 910 transitions. [2021-08-12 19:17:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:25,732 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:25,732 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:25,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:25,948 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:25,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1565959223, now seen corresponding path program 20 times [2021-08-12 19:17:25,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:25,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089811474] [2021-08-12 19:17:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:26,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089811474] [2021-08-12 19:17:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089811474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454408018] [2021-08-12 19:17:26,001 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 [2021-08-12 19:17:26,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:17:26,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:26,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:26,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:26,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454408018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:26,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:26,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:17:26,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473084796] [2021-08-12 19:17:26,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:17:26,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:17:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:17:26,135 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) [2021-08-12 19:17:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:27,837 INFO L93 Difference]: Finished difference Result 481 states and 1354 transitions. [2021-08-12 19:17:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:27,837 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 [2021-08-12 19:17:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:27,839 INFO L225 Difference]: With dead ends: 481 [2021-08-12 19:17:27,839 INFO L226 Difference]: Without dead ends: 460 [2021-08-12 19:17:27,839 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:17:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-08-12 19:17:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 306. [2021-08-12 19:17:28,057 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) [2021-08-12 19:17:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-08-12 19:17:28,058 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-08-12 19:17:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:28,058 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-08-12 19:17:28,058 INFO L483 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) [2021-08-12 19:17:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-08-12 19:17:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:28,059 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:28,059 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:28,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:28,275 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:28,276 INFO L82 PathProgramCache]: Analyzing trace with hash -635798047, now seen corresponding path program 21 times [2021-08-12 19:17:28,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:28,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319901869] [2021-08-12 19:17:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:28,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319901869] [2021-08-12 19:17:28,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319901869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956533741] [2021-08-12 19:17:28,320 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 [2021-08-12 19:17:28,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:17:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:28,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956533741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:28,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:28,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:17:28,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120790338] [2021-08-12 19:17:28,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:28,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:28,489 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) [2021-08-12 19:17:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:30,010 INFO L93 Difference]: Finished difference Result 444 states and 1268 transitions. [2021-08-12 19:17:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:30,011 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 [2021-08-12 19:17:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:30,012 INFO L225 Difference]: With dead ends: 444 [2021-08-12 19:17:30,012 INFO L226 Difference]: Without dead ends: 419 [2021-08-12 19:17:30,013 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:17:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-12 19:17:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 308. [2021-08-12 19:17:30,228 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) [2021-08-12 19:17:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-08-12 19:17:30,230 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 18 [2021-08-12 19:17:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:30,230 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-08-12 19:17:30,230 INFO L483 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) [2021-08-12 19:17:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-08-12 19:17:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:30,230 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:30,230 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:30,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:30,447 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1614261531, now seen corresponding path program 22 times [2021-08-12 19:17:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:30,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160973273] [2021-08-12 19:17:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:30,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:30,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160973273] [2021-08-12 19:17:30,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160973273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:30,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459258248] [2021-08-12 19:17:30,494 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 [2021-08-12 19:17:30,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:17:30,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:30,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:30,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:30,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459258248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:30,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:30,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:17:30,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539979587] [2021-08-12 19:17:30,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:17:30,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:30,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:17:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:17:30,599 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) [2021-08-12 19:17:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:32,454 INFO L93 Difference]: Finished difference Result 537 states and 1532 transitions. [2021-08-12 19:17:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:32,454 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 [2021-08-12 19:17:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:32,456 INFO L225 Difference]: With dead ends: 537 [2021-08-12 19:17:32,456 INFO L226 Difference]: Without dead ends: 516 [2021-08-12 19:17:32,456 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:17:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-08-12 19:17:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 303. [2021-08-12 19:17:32,679 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) [2021-08-12 19:17:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 914 transitions. [2021-08-12 19:17:32,681 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 914 transitions. Word has length 18 [2021-08-12 19:17:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:32,681 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 914 transitions. [2021-08-12 19:17:32,681 INFO L483 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) [2021-08-12 19:17:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 914 transitions. [2021-08-12 19:17:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:32,681 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:32,681 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:32,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-08-12 19:17:32,898 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1839327131, now seen corresponding path program 23 times [2021-08-12 19:17:32,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:32,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030743296] [2021-08-12 19:17:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:32,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:32,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030743296] [2021-08-12 19:17:32,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030743296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:32,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724152018] [2021-08-12 19:17:32,940 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 [2021-08-12 19:17:32,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:17:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:32,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:33,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724152018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:33,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:33,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:17:33,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000113289] [2021-08-12 19:17:33,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:33,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:33,042 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) [2021-08-12 19:17:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:34,942 INFO L93 Difference]: Finished difference Result 539 states and 1561 transitions. [2021-08-12 19:17:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:34,943 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 [2021-08-12 19:17:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:34,945 INFO L225 Difference]: With dead ends: 539 [2021-08-12 19:17:34,945 INFO L226 Difference]: Without dead ends: 518 [2021-08-12 19:17:34,945 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:17:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-12 19:17:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 307. [2021-08-12 19:17:35,165 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) [2021-08-12 19:17:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 934 transitions. [2021-08-12 19:17:35,166 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 934 transitions. Word has length 18 [2021-08-12 19:17:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:35,166 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 934 transitions. [2021-08-12 19:17:35,166 INFO L483 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) [2021-08-12 19:17:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 934 transitions. [2021-08-12 19:17:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:35,167 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:35,167 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:35,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:35,367 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:35,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:35,367 INFO L82 PathProgramCache]: Analyzing trace with hash 756919777, now seen corresponding path program 24 times [2021-08-12 19:17:35,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:35,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344784494] [2021-08-12 19:17:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:35,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:35,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344784494] [2021-08-12 19:17:35,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344784494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943530405] [2021-08-12 19:17:35,409 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 [2021-08-12 19:17:35,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:17:35,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:35,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:35,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943530405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:35,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:35,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:17:35,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732794356] [2021-08-12 19:17:35,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:17:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:35,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:17:35,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:17:35,507 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) [2021-08-12 19:17:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:37,258 INFO L93 Difference]: Finished difference Result 502 states and 1475 transitions. [2021-08-12 19:17:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:37,258 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 [2021-08-12 19:17:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:37,260 INFO L225 Difference]: With dead ends: 502 [2021-08-12 19:17:37,260 INFO L226 Difference]: Without dead ends: 481 [2021-08-12 19:17:37,260 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:17:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-12 19:17:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 299. [2021-08-12 19:17:37,478 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) [2021-08-12 19:17:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-08-12 19:17:37,480 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-08-12 19:17:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:37,480 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-08-12 19:17:37,480 INFO L483 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) [2021-08-12 19:17:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-08-12 19:17:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:37,480 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:37,480 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:37,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-12 19:17:37,695 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:37,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1237003341, now seen corresponding path program 25 times [2021-08-12 19:17:37,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:37,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355208903] [2021-08-12 19:17:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:37,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:37,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355208903] [2021-08-12 19:17:37,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355208903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:37,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160088180] [2021-08-12 19:17:37,746 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 [2021-08-12 19:17:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:37,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:37,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:37,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160088180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:37,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:37,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:17:37,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559728729] [2021-08-12 19:17:37,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:17:37,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:17:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:17:37,850 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) [2021-08-12 19:17:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:39,738 INFO L93 Difference]: Finished difference Result 508 states and 1448 transitions. [2021-08-12 19:17:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:39,738 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 [2021-08-12 19:17:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:39,740 INFO L225 Difference]: With dead ends: 508 [2021-08-12 19:17:39,740 INFO L226 Difference]: Without dead ends: 487 [2021-08-12 19:17:39,740 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:17:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-08-12 19:17:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-08-12 19:17:39,969 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) [2021-08-12 19:17:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 925 transitions. [2021-08-12 19:17:39,971 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 925 transitions. Word has length 18 [2021-08-12 19:17:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:39,971 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 925 transitions. [2021-08-12 19:17:39,971 INFO L483 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) [2021-08-12 19:17:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 925 transitions. [2021-08-12 19:17:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:39,971 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:39,971 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:40,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-12 19:17:40,188 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:40,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2127802779, now seen corresponding path program 26 times [2021-08-12 19:17:40,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:40,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213484464] [2021-08-12 19:17:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:40,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:40,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213484464] [2021-08-12 19:17:40,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213484464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:40,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998040827] [2021-08-12 19:17:40,231 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 [2021-08-12 19:17:40,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:17:40,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:40,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:40,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:40,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998040827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:40,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:40,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:17:40,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293553024] [2021-08-12 19:17:40,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:40,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:40,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:40,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:40,337 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) [2021-08-12 19:17:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:42,191 INFO L93 Difference]: Finished difference Result 496 states and 1408 transitions. [2021-08-12 19:17:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:42,192 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 [2021-08-12 19:17:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:42,193 INFO L225 Difference]: With dead ends: 496 [2021-08-12 19:17:42,193 INFO L226 Difference]: Without dead ends: 471 [2021-08-12 19:17:42,194 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:17:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-12 19:17:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 307. [2021-08-12 19:17:42,422 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) [2021-08-12 19:17:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-08-12 19:17:42,424 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 18 [2021-08-12 19:17:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:42,424 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-08-12 19:17:42,424 INFO L483 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) [2021-08-12 19:17:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-08-12 19:17:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:42,425 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:42,425 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:42,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-12 19:17:42,642 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:42,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1507513033, now seen corresponding path program 27 times [2021-08-12 19:17:42,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:42,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522203510] [2021-08-12 19:17:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:42,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:42,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522203510] [2021-08-12 19:17:42,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522203510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:42,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289053113] [2021-08-12 19:17:42,716 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 [2021-08-12 19:17:42,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:17:42,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:42,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289053113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:42,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:42,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:17:42,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600463769] [2021-08-12 19:17:42,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:17:42,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:42,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:17:42,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:17:42,892 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) [2021-08-12 19:17:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:44,857 INFO L93 Difference]: Finished difference Result 511 states and 1451 transitions. [2021-08-12 19:17:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:44,857 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 [2021-08-12 19:17:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:44,859 INFO L225 Difference]: With dead ends: 511 [2021-08-12 19:17:44,859 INFO L226 Difference]: Without dead ends: 490 [2021-08-12 19:17:44,859 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:17:44,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-12 19:17:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-08-12 19:17:45,076 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) [2021-08-12 19:17:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 923 transitions. [2021-08-12 19:17:45,077 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 923 transitions. Word has length 18 [2021-08-12 19:17:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:45,077 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 923 transitions. [2021-08-12 19:17:45,078 INFO L483 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) [2021-08-12 19:17:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 923 transitions. [2021-08-12 19:17:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:45,078 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:45,078 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:45,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:45,288 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:45,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1326384585, now seen corresponding path program 28 times [2021-08-12 19:17:45,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:45,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078999828] [2021-08-12 19:17:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:45,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078999828] [2021-08-12 19:17:45,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078999828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544211227] [2021-08-12 19:17:45,341 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) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:45,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:17:45,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:45,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544211227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:45,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:45,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:17:45,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944117374] [2021-08-12 19:17:45,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:17:45,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:17:45,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:17:45,496 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) [2021-08-12 19:17:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:47,223 INFO L93 Difference]: Finished difference Result 492 states and 1422 transitions. [2021-08-12 19:17:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:47,224 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 [2021-08-12 19:17:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:47,225 INFO L225 Difference]: With dead ends: 492 [2021-08-12 19:17:47,225 INFO L226 Difference]: Without dead ends: 471 [2021-08-12 19:17:47,225 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:17:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-12 19:17:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 300. [2021-08-12 19:17:47,446 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) [2021-08-12 19:17:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 903 transitions. [2021-08-12 19:17:47,447 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 903 transitions. Word has length 18 [2021-08-12 19:17:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:47,448 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 903 transitions. [2021-08-12 19:17:47,448 INFO L483 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) [2021-08-12 19:17:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 903 transitions. [2021-08-12 19:17:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:47,448 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:47,448 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:47,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-08-12 19:17:47,664 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:47,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:47,665 INFO L82 PathProgramCache]: Analyzing trace with hash -554908191, now seen corresponding path program 29 times [2021-08-12 19:17:47,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:47,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079333083] [2021-08-12 19:17:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:47,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:47,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079333083] [2021-08-12 19:17:47,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079333083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:47,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692915050] [2021-08-12 19:17:47,707 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) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:47,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:17:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:47,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692915050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:47,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:47,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:17:47,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242208665] [2021-08-12 19:17:47,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:17:47,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:47,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:17:47,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:17:47,832 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) [2021-08-12 19:17:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:49,475 INFO L93 Difference]: Finished difference Result 449 states and 1287 transitions. [2021-08-12 19:17:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:49,476 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 [2021-08-12 19:17:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:49,478 INFO L225 Difference]: With dead ends: 449 [2021-08-12 19:17:49,478 INFO L226 Difference]: Without dead ends: 424 [2021-08-12 19:17:49,480 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:17:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-08-12 19:17:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 308. [2021-08-12 19:17:49,717 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) [2021-08-12 19:17:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 925 transitions. [2021-08-12 19:17:49,718 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 925 transitions. Word has length 18 [2021-08-12 19:17:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:49,719 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 925 transitions. [2021-08-12 19:17:49,719 INFO L483 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) [2021-08-12 19:17:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 925 transitions. [2021-08-12 19:17:49,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:49,719 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:49,719 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:49,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-12 19:17:49,933 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash 423649253, now seen corresponding path program 30 times [2021-08-12 19:17:49,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:49,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460661869] [2021-08-12 19:17:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:49,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:49,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460661869] [2021-08-12 19:17:49,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460661869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:49,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477663692] [2021-08-12 19:17:49,973 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 [2021-08-12 19:17:50,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:17:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:50,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477663692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:50,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:50,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:17:50,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242682775] [2021-08-12 19:17:50,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:17:50,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:50,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:17:50,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:17:50,090 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) [2021-08-12 19:17:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:51,650 INFO L93 Difference]: Finished difference Result 433 states and 1257 transitions. [2021-08-12 19:17:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:51,650 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 [2021-08-12 19:17:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:51,652 INFO L225 Difference]: With dead ends: 433 [2021-08-12 19:17:51,652 INFO L226 Difference]: Without dead ends: 412 [2021-08-12 19:17:51,652 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:17:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-12 19:17:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 299. [2021-08-12 19:17:51,872 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) [2021-08-12 19:17:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-08-12 19:17:51,874 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-08-12 19:17:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:51,874 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-08-12 19:17:51,874 INFO L483 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) [2021-08-12 19:17:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-08-12 19:17:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:51,874 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:51,874 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:52,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-12 19:17:52,091 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash 427729059, now seen corresponding path program 31 times [2021-08-12 19:17:52,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:52,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286413177] [2021-08-12 19:17:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:52,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:52,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286413177] [2021-08-12 19:17:52,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286413177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:52,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188948220] [2021-08-12 19:17:52,135 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 [2021-08-12 19:17:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:52,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:52,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188948220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:52,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:52,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:17:52,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180402097] [2021-08-12 19:17:52,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:52,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:52,241 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) [2021-08-12 19:17:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:54,242 INFO L93 Difference]: Finished difference Result 571 states and 1631 transitions. [2021-08-12 19:17:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:54,243 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 [2021-08-12 19:17:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:54,244 INFO L225 Difference]: With dead ends: 571 [2021-08-12 19:17:54,244 INFO L226 Difference]: Without dead ends: 550 [2021-08-12 19:17:54,245 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:17:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-08-12 19:17:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 306. [2021-08-12 19:17:54,464 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) [2021-08-12 19:17:54,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-08-12 19:17:54,465 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-08-12 19:17:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:54,466 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-08-12 19:17:54,466 INFO L483 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) [2021-08-12 19:17:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-08-12 19:17:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:54,466 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:54,466 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:54,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-12 19:17:54,681 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:54,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1635282131, now seen corresponding path program 32 times [2021-08-12 19:17:54,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:54,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570884143] [2021-08-12 19:17:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:54,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:54,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570884143] [2021-08-12 19:17:54,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570884143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:54,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980441683] [2021-08-12 19:17:54,727 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 [2021-08-12 19:17:54,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:17:54,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:54,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:54,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980441683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:54,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:54,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:17:54,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188856174] [2021-08-12 19:17:54,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:17:54,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:54,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:17:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:17:54,813 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) [2021-08-12 19:17:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:56,886 INFO L93 Difference]: Finished difference Result 583 states and 1670 transitions. [2021-08-12 19:17:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:56,887 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 [2021-08-12 19:17:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:56,889 INFO L225 Difference]: With dead ends: 583 [2021-08-12 19:17:56,889 INFO L226 Difference]: Without dead ends: 562 [2021-08-12 19:17:56,889 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:17:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-08-12 19:17:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 310. [2021-08-12 19:17:57,122 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) [2021-08-12 19:17:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 946 transitions. [2021-08-12 19:17:57,124 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 946 transitions. Word has length 18 [2021-08-12 19:17:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:57,124 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 946 transitions. [2021-08-12 19:17:57,124 INFO L483 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) [2021-08-12 19:17:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 946 transitions. [2021-08-12 19:17:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:57,124 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:57,124 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:57,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:57,341 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash -63438257, now seen corresponding path program 33 times [2021-08-12 19:17:57,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:57,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198981295] [2021-08-12 19:17:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:57,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:57,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198981295] [2021-08-12 19:17:57,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198981295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:57,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999491654] [2021-08-12 19:17:57,388 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 [2021-08-12 19:17:57,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:17:57,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:57,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:17:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:57,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999491654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:57,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:57,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:17:57,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443277794] [2021-08-12 19:17:57,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:17:57,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:57,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:17:57,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:17:57,535 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) [2021-08-12 19:17:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:59,684 INFO L93 Difference]: Finished difference Result 592 states and 1693 transitions. [2021-08-12 19:17:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:17:59,684 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 [2021-08-12 19:17:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:59,686 INFO L225 Difference]: With dead ends: 592 [2021-08-12 19:17:59,686 INFO L226 Difference]: Without dead ends: 571 [2021-08-12 19:17:59,686 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:17:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-12 19:17:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 299. [2021-08-12 19:17:59,924 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) [2021-08-12 19:17:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-08-12 19:17:59,926 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-08-12 19:17:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:59,926 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-08-12 19:17:59,926 INFO L483 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) [2021-08-12 19:17:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-08-12 19:17:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:17:59,927 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:59,927 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:00,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:00,133 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1646468570, now seen corresponding path program 4 times [2021-08-12 19:18:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:00,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569740843] [2021-08-12 19:18:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:00,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569740843] [2021-08-12 19:18:00,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569740843] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:18:00,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:18:00,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:18:00,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893330710] [2021-08-12 19:18:00,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:18:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:18:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:18:00,190 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) [2021-08-12 19:18:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:01,493 INFO L93 Difference]: Finished difference Result 431 states and 1251 transitions. [2021-08-12 19:18:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:18:01,493 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 [2021-08-12 19:18:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:01,494 INFO L225 Difference]: With dead ends: 431 [2021-08-12 19:18:01,494 INFO L226 Difference]: Without dead ends: 358 [2021-08-12 19:18:01,495 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:18:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-12 19:18:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 294. [2021-08-12 19:18:01,708 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) [2021-08-12 19:18:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-08-12 19:18:01,709 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-08-12 19:18:01,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:01,709 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-08-12 19:18:01,709 INFO L483 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) [2021-08-12 19:18:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-08-12 19:18:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:01,709 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:01,709 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:01,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-08-12 19:18:01,710 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:01,715 INFO L82 PathProgramCache]: Analyzing trace with hash -269670517, now seen corresponding path program 34 times [2021-08-12 19:18:01,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:01,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860807402] [2021-08-12 19:18:01,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:01,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:01,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860807402] [2021-08-12 19:18:01,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860807402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:01,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262803150] [2021-08-12 19:18:01,786 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 [2021-08-12 19:18:01,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:18:01,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:01,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:01,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262803150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:01,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:01,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:18:01,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798283699] [2021-08-12 19:18:01,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:18:01,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:18:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:18:01,889 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) [2021-08-12 19:18:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:04,259 INFO L93 Difference]: Finished difference Result 650 states and 1822 transitions. [2021-08-12 19:18:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:04,259 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 [2021-08-12 19:18:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:04,261 INFO L225 Difference]: With dead ends: 650 [2021-08-12 19:18:04,261 INFO L226 Difference]: Without dead ends: 629 [2021-08-12 19:18:04,261 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:18:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-12 19:18:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 298. [2021-08-12 19:18:04,484 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) [2021-08-12 19:18:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 889 transitions. [2021-08-12 19:18:04,485 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 889 transitions. Word has length 18 [2021-08-12 19:18:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:04,485 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 889 transitions. [2021-08-12 19:18:04,485 INFO L483 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) [2021-08-12 19:18:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 889 transitions. [2021-08-12 19:18:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:04,486 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:04,486 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:04,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-12 19:18:04,702 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash -472443849, now seen corresponding path program 35 times [2021-08-12 19:18:04,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:04,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589952049] [2021-08-12 19:18:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:04,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:04,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589952049] [2021-08-12 19:18:04,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589952049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:04,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379687294] [2021-08-12 19:18:04,747 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 [2021-08-12 19:18:04,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:04,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:04,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:04,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379687294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:04,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:04,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:04,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299230406] [2021-08-12 19:18:04,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:04,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:04,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:04,854 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) [2021-08-12 19:18:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:07,168 INFO L93 Difference]: Finished difference Result 608 states and 1710 transitions. [2021-08-12 19:18:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:07,168 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 [2021-08-12 19:18:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:07,170 INFO L225 Difference]: With dead ends: 608 [2021-08-12 19:18:07,170 INFO L226 Difference]: Without dead ends: 583 [2021-08-12 19:18:07,170 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:18:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-12 19:18:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 306. [2021-08-12 19:18:07,405 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) [2021-08-12 19:18:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 911 transitions. [2021-08-12 19:18:07,407 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 911 transitions. Word has length 18 [2021-08-12 19:18:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:07,407 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 911 transitions. [2021-08-12 19:18:07,407 INFO L483 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) [2021-08-12 19:18:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 911 transitions. [2021-08-12 19:18:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:07,407 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:07,407 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:07,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-12 19:18:07,608 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:07,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1687803469, now seen corresponding path program 36 times [2021-08-12 19:18:07,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:07,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763151138] [2021-08-12 19:18:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:07,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:07,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763151138] [2021-08-12 19:18:07,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763151138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:07,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312986535] [2021-08-12 19:18:07,658 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 [2021-08-12 19:18:07,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:18:07,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:07,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:07,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312986535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:07,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:07,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:07,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532899240] [2021-08-12 19:18:07,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:07,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:07,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:07,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:07,759 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) [2021-08-12 19:18:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:09,961 INFO L93 Difference]: Finished difference Result 592 states and 1680 transitions. [2021-08-12 19:18:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:09,961 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 [2021-08-12 19:18:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:09,963 INFO L225 Difference]: With dead ends: 592 [2021-08-12 19:18:09,963 INFO L226 Difference]: Without dead ends: 571 [2021-08-12 19:18:09,963 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:18:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-12 19:18:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 294. [2021-08-12 19:18:10,187 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) [2021-08-12 19:18:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-08-12 19:18:10,189 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-08-12 19:18:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:10,189 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-08-12 19:18:10,189 INFO L483 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) [2021-08-12 19:18:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-08-12 19:18:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:10,189 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:10,189 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:10,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-12 19:18:10,398 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1039285976, now seen corresponding path program 5 times [2021-08-12 19:18:10,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:10,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730258430] [2021-08-12 19:18:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:10,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:10,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730258430] [2021-08-12 19:18:10,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730258430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:10,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855428736] [2021-08-12 19:18:10,434 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 [2021-08-12 19:18:10,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:10,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:18:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:10,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855428736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:10,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:10,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-12 19:18:10,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463457239] [2021-08-12 19:18:10,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:18:10,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:10,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:18:10,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:18:10,534 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) [2021-08-12 19:18:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:11,987 INFO L93 Difference]: Finished difference Result 450 states and 1289 transitions. [2021-08-12 19:18:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:18:11,987 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 [2021-08-12 19:18:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:11,989 INFO L225 Difference]: With dead ends: 450 [2021-08-12 19:18:11,989 INFO L226 Difference]: Without dead ends: 391 [2021-08-12 19:18:11,989 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-12 19:18:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 287. [2021-08-12 19:18:12,200 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) [2021-08-12 19:18:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 846 transitions. [2021-08-12 19:18:12,202 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 846 transitions. Word has length 18 [2021-08-12 19:18:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:12,202 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 846 transitions. [2021-08-12 19:18:12,202 INFO L483 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) [2021-08-12 19:18:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 846 transitions. [2021-08-12 19:18:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:12,202 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:12,202 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:12,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-12 19:18:12,417 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash -603032005, now seen corresponding path program 37 times [2021-08-12 19:18:12,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:12,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613149333] [2021-08-12 19:18:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:12,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:12,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613149333] [2021-08-12 19:18:12,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613149333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:12,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481832145] [2021-08-12 19:18:12,468 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 [2021-08-12 19:18:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:12,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:12,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:12,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481832145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:12,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:12,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:18:12,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619557711] [2021-08-12 19:18:12,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:12,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:12,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:12,580 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) [2021-08-12 19:18:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:14,889 INFO L93 Difference]: Finished difference Result 612 states and 1734 transitions. [2021-08-12 19:18:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:14,890 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 [2021-08-12 19:18:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:14,892 INFO L225 Difference]: With dead ends: 612 [2021-08-12 19:18:14,892 INFO L226 Difference]: Without dead ends: 591 [2021-08-12 19:18:14,892 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:18:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-12 19:18:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 293. [2021-08-12 19:18:15,119 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) [2021-08-12 19:18:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 873 transitions. [2021-08-12 19:18:15,121 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 873 transitions. Word has length 18 [2021-08-12 19:18:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:15,121 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 873 transitions. [2021-08-12 19:18:15,121 INFO L483 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) [2021-08-12 19:18:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 873 transitions. [2021-08-12 19:18:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:15,122 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:15,122 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:15,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:15,338 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash 327129171, now seen corresponding path program 38 times [2021-08-12 19:18:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:15,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033667915] [2021-08-12 19:18:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:15,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033667915] [2021-08-12 19:18:15,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033667915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243282510] [2021-08-12 19:18:15,378 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 [2021-08-12 19:18:15,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:15,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:15,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:15,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243282510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:15,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:15,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:18:15,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843882285] [2021-08-12 19:18:15,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:18:15,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:15,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:18:15,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:18:15,513 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) [2021-08-12 19:18:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:17,706 INFO L93 Difference]: Finished difference Result 600 states and 1694 transitions. [2021-08-12 19:18:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:17,706 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 [2021-08-12 19:18:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:17,708 INFO L225 Difference]: With dead ends: 600 [2021-08-12 19:18:17,708 INFO L226 Difference]: Without dead ends: 575 [2021-08-12 19:18:17,708 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:18:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-08-12 19:18:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 295. [2021-08-12 19:18:17,930 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) [2021-08-12 19:18:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-08-12 19:18:17,932 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-08-12 19:18:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:17,932 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-08-12 19:18:17,932 INFO L483 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) [2021-08-12 19:18:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-08-12 19:18:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:17,932 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:17,932 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:18,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:18,154 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash -332522313, now seen corresponding path program 39 times [2021-08-12 19:18:18,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:18,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869693430] [2021-08-12 19:18:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:18,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:18,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869693430] [2021-08-12 19:18:18,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869693430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:18,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837281857] [2021-08-12 19:18:18,203 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 [2021-08-12 19:18:18,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:18:18,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:18,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:18,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:18,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837281857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:18,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:18,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-12 19:18:18,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800385709] [2021-08-12 19:18:18,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:18:18,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:18,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:18:18,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:18:18,336 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) [2021-08-12 19:18:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:20,888 INFO L93 Difference]: Finished difference Result 655 states and 1831 transitions. [2021-08-12 19:18:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:20,889 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 [2021-08-12 19:18:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:20,890 INFO L225 Difference]: With dead ends: 655 [2021-08-12 19:18:20,891 INFO L226 Difference]: Without dead ends: 634 [2021-08-12 19:18:20,891 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:18:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-08-12 19:18:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 292. [2021-08-12 19:18:21,120 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) [2021-08-12 19:18:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 871 transitions. [2021-08-12 19:18:21,122 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 871 transitions. Word has length 18 [2021-08-12 19:18:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:21,122 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 871 transitions. [2021-08-12 19:18:21,122 INFO L483 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) [2021-08-12 19:18:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 871 transitions. [2021-08-12 19:18:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:21,122 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:21,122 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:21,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:21,339 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:21,339 INFO L82 PathProgramCache]: Analyzing trace with hash -513650761, now seen corresponding path program 40 times [2021-08-12 19:18:21,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:21,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902072753] [2021-08-12 19:18:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:21,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:21,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902072753] [2021-08-12 19:18:21,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902072753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:21,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086439754] [2021-08-12 19:18:21,397 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 [2021-08-12 19:18:21,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:18:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:21,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:21,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086439754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:21,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:21,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:21,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840366180] [2021-08-12 19:18:21,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:21,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:21,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:21,523 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) [2021-08-12 19:18:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:23,968 INFO L93 Difference]: Finished difference Result 636 states and 1802 transitions. [2021-08-12 19:18:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:23,968 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 [2021-08-12 19:18:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:23,970 INFO L225 Difference]: With dead ends: 636 [2021-08-12 19:18:23,970 INFO L226 Difference]: Without dead ends: 615 [2021-08-12 19:18:23,970 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:18:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-12 19:18:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 288. [2021-08-12 19:18:24,194 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) [2021-08-12 19:18:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 851 transitions. [2021-08-12 19:18:24,196 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 851 transitions. Word has length 18 [2021-08-12 19:18:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:24,196 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 851 transitions. [2021-08-12 19:18:24,196 INFO L483 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) [2021-08-12 19:18:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 851 transitions. [2021-08-12 19:18:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:24,196 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:24,196 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:24,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:24,412 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1900023759, now seen corresponding path program 41 times [2021-08-12 19:18:24,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:24,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843734513] [2021-08-12 19:18:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:24,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843734513] [2021-08-12 19:18:24,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843734513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598004289] [2021-08-12 19:18:24,454 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 [2021-08-12 19:18:24,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:24,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:24,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598004289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:24,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:24,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:24,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198539488] [2021-08-12 19:18:24,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:24,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:24,558 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) [2021-08-12 19:18:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:26,907 INFO L93 Difference]: Finished difference Result 608 states and 1704 transitions. [2021-08-12 19:18:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:26,908 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 [2021-08-12 19:18:26,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:26,910 INFO L225 Difference]: With dead ends: 608 [2021-08-12 19:18:26,910 INFO L226 Difference]: Without dead ends: 583 [2021-08-12 19:18:26,910 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:18:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-12 19:18:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 296. [2021-08-12 19:18:27,137 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) [2021-08-12 19:18:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 873 transitions. [2021-08-12 19:18:27,139 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 873 transitions. Word has length 18 [2021-08-12 19:18:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:27,139 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 873 transitions. [2021-08-12 19:18:27,139 INFO L483 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) [2021-08-12 19:18:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 873 transitions. [2021-08-12 19:18:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:27,139 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:27,139 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:27,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-12 19:18:27,355 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1416386093, now seen corresponding path program 42 times [2021-08-12 19:18:27,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:27,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017309081] [2021-08-12 19:18:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:27,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:27,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017309081] [2021-08-12 19:18:27,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017309081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:27,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342332970] [2021-08-12 19:18:27,400 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 [2021-08-12 19:18:27,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:18:27,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:27,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:27,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:27,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342332970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:27,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:27,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:27,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433127694] [2021-08-12 19:18:27,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:27,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:27,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:27,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:27,502 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) [2021-08-12 19:18:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:29,714 INFO L93 Difference]: Finished difference Result 592 states and 1674 transitions. [2021-08-12 19:18:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:29,715 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 [2021-08-12 19:18:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:29,717 INFO L225 Difference]: With dead ends: 592 [2021-08-12 19:18:29,717 INFO L226 Difference]: Without dead ends: 571 [2021-08-12 19:18:29,717 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:18:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-12 19:18:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 285. [2021-08-12 19:18:29,935 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) [2021-08-12 19:18:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-08-12 19:18:29,936 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-08-12 19:18:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:29,936 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-08-12 19:18:29,937 INFO L483 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) [2021-08-12 19:18:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-08-12 19:18:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:29,937 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:29,937 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:30,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-08-12 19:18:30,153 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1542604225, now seen corresponding path program 43 times [2021-08-12 19:18:30,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:30,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608369797] [2021-08-12 19:18:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:30,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:30,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608369797] [2021-08-12 19:18:30,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608369797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:30,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468292243] [2021-08-12 19:18:30,205 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 [2021-08-12 19:18:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:30,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:30,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:30,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468292243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:30,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:30,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:18:30,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488066997] [2021-08-12 19:18:30,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:18:30,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:30,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:18:30,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:18:30,320 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) [2021-08-12 19:18:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:32,123 INFO L93 Difference]: Finished difference Result 481 states and 1341 transitions. [2021-08-12 19:18:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:32,123 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 [2021-08-12 19:18:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:32,125 INFO L225 Difference]: With dead ends: 481 [2021-08-12 19:18:32,125 INFO L226 Difference]: Without dead ends: 460 [2021-08-12 19:18:32,125 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:18:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-08-12 19:18:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 289. [2021-08-12 19:18:32,352 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) [2021-08-12 19:18:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 848 transitions. [2021-08-12 19:18:32,353 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 848 transitions. Word has length 18 [2021-08-12 19:18:32,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:32,353 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 848 transitions. [2021-08-12 19:18:32,353 INFO L483 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) [2021-08-12 19:18:32,353 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 848 transitions. [2021-08-12 19:18:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:32,354 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:32,354 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:32,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:32,568 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1745377557, now seen corresponding path program 44 times [2021-08-12 19:18:32,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:32,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143319568] [2021-08-12 19:18:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:32,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:32,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143319568] [2021-08-12 19:18:32,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143319568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:32,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054508547] [2021-08-12 19:18:32,615 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 [2021-08-12 19:18:32,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:32,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:32,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054508547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:32,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:32,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:32,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122647035] [2021-08-12 19:18:32,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:32,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:32,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:32,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:32,725 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) [2021-08-12 19:18:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:34,649 INFO L93 Difference]: Finished difference Result 487 states and 1347 transitions. [2021-08-12 19:18:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:34,650 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 [2021-08-12 19:18:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:34,651 INFO L225 Difference]: With dead ends: 487 [2021-08-12 19:18:34,651 INFO L226 Difference]: Without dead ends: 462 [2021-08-12 19:18:34,652 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:18:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-12 19:18:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 297. [2021-08-12 19:18:34,886 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) [2021-08-12 19:18:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 870 transitions. [2021-08-12 19:18:34,887 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 870 transitions. Word has length 18 [2021-08-12 19:18:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:34,887 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 870 transitions. [2021-08-12 19:18:34,888 INFO L483 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) [2021-08-12 19:18:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 870 transitions. [2021-08-12 19:18:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:34,888 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:34,888 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:35,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-08-12 19:18:35,104 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1334230119, now seen corresponding path program 45 times [2021-08-12 19:18:35,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:35,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657263011] [2021-08-12 19:18:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:35,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:35,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657263011] [2021-08-12 19:18:35,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657263011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:35,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208858640] [2021-08-12 19:18:35,159 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 [2021-08-12 19:18:35,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:18:35,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:35,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:35,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208858640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:35,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:35,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:35,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291357518] [2021-08-12 19:18:35,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:35,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:35,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:35,263 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) [2021-08-12 19:18:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:37,097 INFO L93 Difference]: Finished difference Result 471 states and 1317 transitions. [2021-08-12 19:18:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:37,098 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 [2021-08-12 19:18:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:37,099 INFO L225 Difference]: With dead ends: 471 [2021-08-12 19:18:37,100 INFO L226 Difference]: Without dead ends: 450 [2021-08-12 19:18:37,100 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:18:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-12 19:18:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 285. [2021-08-12 19:18:37,325 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) [2021-08-12 19:18:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-08-12 19:18:37,326 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-08-12 19:18:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:37,327 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-08-12 19:18:37,327 INFO L483 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) [2021-08-12 19:18:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-08-12 19:18:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:37,327 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:37,327 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:37,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-08-12 19:18:37,543 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:37,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1633409787, now seen corresponding path program 46 times [2021-08-12 19:18:37,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:37,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825641527] [2021-08-12 19:18:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:37,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825641527] [2021-08-12 19:18:37,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825641527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472162418] [2021-08-12 19:18:37,588 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 [2021-08-12 19:18:37,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:18:37,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:37,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472162418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:37,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:37,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:18:37,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749285687] [2021-08-12 19:18:37,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:18:37,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:37,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:18:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:18:37,684 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) [2021-08-12 19:18:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:39,362 INFO L93 Difference]: Finished difference Result 435 states and 1222 transitions. [2021-08-12 19:18:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:39,362 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 [2021-08-12 19:18:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:39,364 INFO L225 Difference]: With dead ends: 435 [2021-08-12 19:18:39,364 INFO L226 Difference]: Without dead ends: 406 [2021-08-12 19:18:39,364 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:18:39,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-12 19:18:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 287. [2021-08-12 19:18:39,603 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) [2021-08-12 19:18:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 843 transitions. [2021-08-12 19:18:39,605 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 843 transitions. Word has length 18 [2021-08-12 19:18:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:39,605 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 843 transitions. [2021-08-12 19:18:39,605 INFO L483 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) [2021-08-12 19:18:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 843 transitions. [2021-08-12 19:18:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:39,605 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:39,605 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:39,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:39,821 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:39,822 INFO L82 PathProgramCache]: Analyzing trace with hash 44908247, now seen corresponding path program 6 times [2021-08-12 19:18:39,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:39,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606744778] [2021-08-12 19:18:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:39,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:39,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606744778] [2021-08-12 19:18:39,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606744778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:39,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231692425] [2021-08-12 19:18:39,854 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 [2021-08-12 19:18:39,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:18:39,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:18:39,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:39,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231692425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:39,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:39,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:39,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363977743] [2021-08-12 19:18:39,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:39,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:39,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:39,939 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) [2021-08-12 19:18:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:41,744 INFO L93 Difference]: Finished difference Result 478 states and 1334 transitions. [2021-08-12 19:18:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:41,744 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 [2021-08-12 19:18:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:41,746 INFO L225 Difference]: With dead ends: 478 [2021-08-12 19:18:41,746 INFO L226 Difference]: Without dead ends: 454 [2021-08-12 19:18:41,746 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:18:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-12 19:18:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 289. [2021-08-12 19:18:41,969 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) [2021-08-12 19:18:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-08-12 19:18:41,971 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-08-12 19:18:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:41,971 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-08-12 19:18:41,971 INFO L483 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) [2021-08-12 19:18:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-08-12 19:18:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:41,972 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:41,972 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:42,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-12 19:18:42,187 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash -675858551, now seen corresponding path program 47 times [2021-08-12 19:18:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:42,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842602773] [2021-08-12 19:18:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:42,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842602773] [2021-08-12 19:18:42,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842602773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279092157] [2021-08-12 19:18:42,235 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 [2021-08-12 19:18:42,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:42,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:42,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:42,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:42,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279092157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:42,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:42,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:42,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390706336] [2021-08-12 19:18:42,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:42,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:42,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:42,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:42,396 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) [2021-08-12 19:18:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:44,097 INFO L93 Difference]: Finished difference Result 436 states and 1226 transitions. [2021-08-12 19:18:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:44,097 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 [2021-08-12 19:18:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:44,099 INFO L225 Difference]: With dead ends: 436 [2021-08-12 19:18:44,099 INFO L226 Difference]: Without dead ends: 411 [2021-08-12 19:18:44,099 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:18:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-08-12 19:18:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 297. [2021-08-12 19:18:44,329 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) [2021-08-12 19:18:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-08-12 19:18:44,331 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-08-12 19:18:44,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:44,331 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-08-12 19:18:44,331 INFO L483 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) [2021-08-12 19:18:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-08-12 19:18:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:44,331 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:44,331 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:44,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:44,547 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:44,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:44,548 INFO L82 PathProgramCache]: Analyzing trace with hash 438614075, now seen corresponding path program 7 times [2021-08-12 19:18:44,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:44,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678392678] [2021-08-12 19:18:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:44,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:44,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678392678] [2021-08-12 19:18:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678392678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:44,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902667738] [2021-08-12 19:18:44,583 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 [2021-08-12 19:18:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:44,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:18:44,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:44,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902667738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:44,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:44,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:44,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007872256] [2021-08-12 19:18:44,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:44,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:44,672 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) [2021-08-12 19:18:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:46,561 INFO L93 Difference]: Finished difference Result 493 states and 1365 transitions. [2021-08-12 19:18:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:46,562 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 [2021-08-12 19:18:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:46,563 INFO L225 Difference]: With dead ends: 493 [2021-08-12 19:18:46,563 INFO L226 Difference]: Without dead ends: 469 [2021-08-12 19:18:46,564 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:18:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-12 19:18:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 297. [2021-08-12 19:18:46,797 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) [2021-08-12 19:18:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-08-12 19:18:46,799 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-08-12 19:18:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:46,799 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-08-12 19:18:46,799 INFO L483 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) [2021-08-12 19:18:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-08-12 19:18:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:46,799 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:46,799 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:47,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2021-08-12 19:18:47,015 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1891218171, now seen corresponding path program 48 times [2021-08-12 19:18:47,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:47,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326747268] [2021-08-12 19:18:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:47,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:47,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326747268] [2021-08-12 19:18:47,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326747268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:47,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607759792] [2021-08-12 19:18:47,095 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 [2021-08-12 19:18:47,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:18:47,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:47,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607759792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:47,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:47,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:18:47,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195555100] [2021-08-12 19:18:47,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:47,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:47,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:47,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:47,218 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) [2021-08-12 19:18:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:48,739 INFO L93 Difference]: Finished difference Result 411 states and 1174 transitions. [2021-08-12 19:18:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:48,739 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 [2021-08-12 19:18:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:48,741 INFO L225 Difference]: With dead ends: 411 [2021-08-12 19:18:48,741 INFO L226 Difference]: Without dead ends: 390 [2021-08-12 19:18:48,741 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:18:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-12 19:18:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 291. [2021-08-12 19:18:48,965 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) [2021-08-12 19:18:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-08-12 19:18:48,967 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 18 [2021-08-12 19:18:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:48,967 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-08-12 19:18:48,967 INFO L483 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) [2021-08-12 19:18:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-08-12 19:18:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:48,967 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:48,967 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:49,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-08-12 19:18:49,183 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:49,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1494230001, now seen corresponding path program 8 times [2021-08-12 19:18:49,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:49,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281800689] [2021-08-12 19:18:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:49,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:49,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281800689] [2021-08-12 19:18:49,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281800689] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:18:49,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:18:49,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 19:18:49,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576305247] [2021-08-12 19:18:49,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:18:49,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:18:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:18:49,241 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) [2021-08-12 19:18:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:50,914 INFO L93 Difference]: Finished difference Result 451 states and 1264 transitions. [2021-08-12 19:18:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:50,914 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 [2021-08-12 19:18:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:50,916 INFO L225 Difference]: With dead ends: 451 [2021-08-12 19:18:50,916 INFO L226 Difference]: Without dead ends: 420 [2021-08-12 19:18:50,916 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:18:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-12 19:18:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 289. [2021-08-12 19:18:51,153 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) [2021-08-12 19:18:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-08-12 19:18:51,154 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-08-12 19:18:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:51,154 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-08-12 19:18:51,154 INFO L483 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) [2021-08-12 19:18:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-08-12 19:18:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:51,155 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:51,155 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:51,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-08-12 19:18:51,155 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:51,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1770591994, now seen corresponding path program 6 times [2021-08-12 19:18:51,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:51,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888902977] [2021-08-12 19:18:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:51,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:51,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888902977] [2021-08-12 19:18:51,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888902977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:51,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412836046] [2021-08-12 19:18:51,182 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 [2021-08-12 19:18:51,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:18:51,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:51,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:18:51,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:51,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412836046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:51,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:51,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-12 19:18:51,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866902338] [2021-08-12 19:18:51,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:51,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:51,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:51,276 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) [2021-08-12 19:18:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:52,914 INFO L93 Difference]: Finished difference Result 437 states and 1235 transitions. [2021-08-12 19:18:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:18:52,914 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 [2021-08-12 19:18:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:52,916 INFO L225 Difference]: With dead ends: 437 [2021-08-12 19:18:52,916 INFO L226 Difference]: Without dead ends: 347 [2021-08-12 19:18:52,916 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:18:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-08-12 19:18:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 255. [2021-08-12 19:18:53,127 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) [2021-08-12 19:18:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 757 transitions. [2021-08-12 19:18:53,129 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 757 transitions. Word has length 18 [2021-08-12 19:18:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:53,129 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 757 transitions. [2021-08-12 19:18:53,129 INFO L483 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) [2021-08-12 19:18:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 757 transitions. [2021-08-12 19:18:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:53,129 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:53,129 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:53,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:53,345 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash 698798277, now seen corresponding path program 49 times [2021-08-12 19:18:53,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:53,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451055155] [2021-08-12 19:18:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:53,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451055155] [2021-08-12 19:18:53,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451055155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800105768] [2021-08-12 19:18:53,397 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 [2021-08-12 19:18:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:53,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800105768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:53,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:53,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:18:53,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735931513] [2021-08-12 19:18:53,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:18:53,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:53,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:18:53,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:18:53,489 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) [2021-08-12 19:18:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:55,321 INFO L93 Difference]: Finished difference Result 459 states and 1301 transitions. [2021-08-12 19:18:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:55,321 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 [2021-08-12 19:18:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:55,323 INFO L225 Difference]: With dead ends: 459 [2021-08-12 19:18:55,323 INFO L226 Difference]: Without dead ends: 438 [2021-08-12 19:18:55,323 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:18:55,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-12 19:18:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 260. [2021-08-12 19:18:55,527 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) [2021-08-12 19:18:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-08-12 19:18:55,528 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 18 [2021-08-12 19:18:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:55,529 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-08-12 19:18:55,529 INFO L483 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) [2021-08-12 19:18:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-08-12 19:18:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:55,529 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:55,529 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:55,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:55,745 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1628959453, now seen corresponding path program 50 times [2021-08-12 19:18:55,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:55,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624400526] [2021-08-12 19:18:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:55,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:55,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624400526] [2021-08-12 19:18:55,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624400526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:55,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126891424] [2021-08-12 19:18:55,797 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 [2021-08-12 19:18:55,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:55,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:55,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:55,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126891424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:55,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:55,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:18:55,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379097954] [2021-08-12 19:18:55,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:18:55,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:55,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:18:55,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:18:55,911 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) [2021-08-12 19:18:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:57,813 INFO L93 Difference]: Finished difference Result 463 states and 1301 transitions. [2021-08-12 19:18:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:18:57,813 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 [2021-08-12 19:18:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:57,815 INFO L225 Difference]: With dead ends: 463 [2021-08-12 19:18:57,815 INFO L226 Difference]: Without dead ends: 438 [2021-08-12 19:18:57,815 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:18:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-12 19:18:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 258. [2021-08-12 19:18:58,021 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) [2021-08-12 19:18:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-08-12 19:18:58,023 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 18 [2021-08-12 19:18:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:58,023 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-08-12 19:18:58,023 INFO L483 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) [2021-08-12 19:18:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-08-12 19:18:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:18:58,023 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:58,023 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:58,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:58,239 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 616266921, now seen corresponding path program 51 times [2021-08-12 19:18:58,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:58,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744978627] [2021-08-12 19:18:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:58,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:58,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744978627] [2021-08-12 19:18:58,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744978627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:58,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226511768] [2021-08-12 19:18:58,281 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 [2021-08-12 19:18:58,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:18:58,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:58,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:18:58,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:58,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226511768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:58,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:58,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:18:58,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219296645] [2021-08-12 19:18:58,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:18:58,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:58,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:18:58,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:18:58,371 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) [2021-08-12 19:19:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:00,204 INFO L93 Difference]: Finished difference Result 457 states and 1282 transitions. [2021-08-12 19:19:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:00,205 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 [2021-08-12 19:19:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:00,206 INFO L225 Difference]: With dead ends: 457 [2021-08-12 19:19:00,206 INFO L226 Difference]: Without dead ends: 428 [2021-08-12 19:19:00,207 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:19:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-12 19:19:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 258. [2021-08-12 19:19:00,408 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) [2021-08-12 19:19:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 767 transitions. [2021-08-12 19:19:00,409 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 767 transitions. Word has length 18 [2021-08-12 19:19:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:00,409 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 767 transitions. [2021-08-12 19:19:00,409 INFO L483 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) [2021-08-12 19:19:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 767 transitions. [2021-08-12 19:19:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:00,410 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:00,410 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:00,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-08-12 19:19:00,626 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1345274345, now seen corresponding path program 9 times [2021-08-12 19:19:00,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:00,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62492086] [2021-08-12 19:19:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:00,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:00,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62492086] [2021-08-12 19:19:00,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62492086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:00,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806181284] [2021-08-12 19:19:00,643 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 [2021-08-12 19:19:00,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:19:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:19:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:00,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806181284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:00,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:00,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 19:19:00,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112452721] [2021-08-12 19:19:00,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:19:00,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:00,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:19:00,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:19:00,712 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) [2021-08-12 19:19:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:01,934 INFO L93 Difference]: Finished difference Result 395 states and 1150 transitions. [2021-08-12 19:19:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:19:01,934 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 [2021-08-12 19:19:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:01,935 INFO L225 Difference]: With dead ends: 395 [2021-08-12 19:19:01,936 INFO L226 Difference]: Without dead ends: 353 [2021-08-12 19:19:01,936 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-12 19:19:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 247. [2021-08-12 19:19:02,131 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) [2021-08-12 19:19:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 735 transitions. [2021-08-12 19:19:02,132 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 735 transitions. Word has length 18 [2021-08-12 19:19:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:02,132 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 735 transitions. [2021-08-12 19:19:02,132 INFO L483 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) [2021-08-12 19:19:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 735 transitions. [2021-08-12 19:19:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:02,133 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:02,133 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:02,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-08-12 19:19:02,346 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:02,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1782534729, now seen corresponding path program 52 times [2021-08-12 19:19:02,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:02,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960592743] [2021-08-12 19:19:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:02,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:02,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960592743] [2021-08-12 19:19:02,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960592743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:02,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837242315] [2021-08-12 19:19:02,395 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 [2021-08-12 19:19:02,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:19:02,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:02,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:02,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:02,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837242315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:02,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:02,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:19:02,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074097467] [2021-08-12 19:19:02,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:19:02,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:19:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:19:02,497 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) [2021-08-12 19:19:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:04,547 INFO L93 Difference]: Finished difference Result 489 states and 1355 transitions. [2021-08-12 19:19:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:04,548 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 [2021-08-12 19:19:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:04,550 INFO L225 Difference]: With dead ends: 489 [2021-08-12 19:19:04,550 INFO L226 Difference]: Without dead ends: 468 [2021-08-12 19:19:04,550 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-12 19:19:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 253. [2021-08-12 19:19:04,760 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) [2021-08-12 19:19:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-08-12 19:19:04,761 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 18 [2021-08-12 19:19:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:04,762 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-08-12 19:19:04,762 INFO L483 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) [2021-08-12 19:19:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-08-12 19:19:04,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:04,762 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:04,762 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:04,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-08-12 19:19:04,978 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1582271391, now seen corresponding path program 53 times [2021-08-12 19:19:04,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:04,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310170718] [2021-08-12 19:19:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:05,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:05,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310170718] [2021-08-12 19:19:05,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310170718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:05,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808012264] [2021-08-12 19:19:05,019 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 [2021-08-12 19:19:05,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:05,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:05,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:05,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808012264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:05,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:05,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:19:05,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121493518] [2021-08-12 19:19:05,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:05,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:05,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:05,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:05,110 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) [2021-08-12 19:19:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:07,308 INFO L93 Difference]: Finished difference Result 493 states and 1355 transitions. [2021-08-12 19:19:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:07,308 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 [2021-08-12 19:19:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:07,310 INFO L225 Difference]: With dead ends: 493 [2021-08-12 19:19:07,310 INFO L226 Difference]: Without dead ends: 468 [2021-08-12 19:19:07,310 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:19:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-12 19:19:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-08-12 19:19:07,519 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) [2021-08-12 19:19:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 764 transitions. [2021-08-12 19:19:07,521 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 764 transitions. Word has length 18 [2021-08-12 19:19:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:07,521 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 764 transitions. [2021-08-12 19:19:07,521 INFO L483 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) [2021-08-12 19:19:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 764 transitions. [2021-08-12 19:19:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:07,521 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:07,521 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:07,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:07,725 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash -951095685, now seen corresponding path program 10 times [2021-08-12 19:19:07,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:07,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995024568] [2021-08-12 19:19:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:07,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995024568] [2021-08-12 19:19:07,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995024568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34620619] [2021-08-12 19:19:07,752 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 [2021-08-12 19:19:07,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:19:07,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:19:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:07,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34620619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:07,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:07,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-12 19:19:07,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825200428] [2021-08-12 19:19:07,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:19:07,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:07,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:19:07,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:19:07,827 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) [2021-08-12 19:19:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:09,107 INFO L93 Difference]: Finished difference Result 362 states and 1026 transitions. [2021-08-12 19:19:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:19:09,107 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 [2021-08-12 19:19:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:09,108 INFO L225 Difference]: With dead ends: 362 [2021-08-12 19:19:09,109 INFO L226 Difference]: Without dead ends: 320 [2021-08-12 19:19:09,109 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-12 19:19:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 249. [2021-08-12 19:19:09,319 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) [2021-08-12 19:19:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 737 transitions. [2021-08-12 19:19:09,321 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 737 transitions. Word has length 18 [2021-08-12 19:19:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:09,321 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 737 transitions. [2021-08-12 19:19:09,321 INFO L483 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) [2021-08-12 19:19:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 737 transitions. [2021-08-12 19:19:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:09,322 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:09,322 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:09,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-08-12 19:19:09,536 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:09,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2053044421, now seen corresponding path program 54 times [2021-08-12 19:19:09,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:09,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871093597] [2021-08-12 19:19:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:09,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:09,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871093597] [2021-08-12 19:19:09,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871093597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:09,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69107158] [2021-08-12 19:19:09,590 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 [2021-08-12 19:19:09,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:19:09,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:09,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:09,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69107158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:09,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:09,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-12 19:19:09,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266083681] [2021-08-12 19:19:09,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:19:09,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:09,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:19:09,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:19:09,707 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) [2021-08-12 19:19:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:11,724 INFO L93 Difference]: Finished difference Result 463 states and 1278 transitions. [2021-08-12 19:19:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:11,724 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 [2021-08-12 19:19:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:11,726 INFO L225 Difference]: With dead ends: 463 [2021-08-12 19:19:11,726 INFO L226 Difference]: Without dead ends: 442 [2021-08-12 19:19:11,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:19:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-08-12 19:19:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 246. [2021-08-12 19:19:11,940 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) [2021-08-12 19:19:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 734 transitions. [2021-08-12 19:19:11,941 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 734 transitions. Word has length 18 [2021-08-12 19:19:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:11,942 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 734 transitions. [2021-08-12 19:19:11,942 INFO L483 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) [2021-08-12 19:19:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 734 transitions. [2021-08-12 19:19:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:11,942 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:11,942 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:12,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:12,157 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1871915973, now seen corresponding path program 55 times [2021-08-12 19:19:12,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:12,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138969201] [2021-08-12 19:19:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:12,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:12,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138969201] [2021-08-12 19:19:12,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138969201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:12,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224592813] [2021-08-12 19:19:12,218 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 [2021-08-12 19:19:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:12,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:12,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224592813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:12,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:12,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:19:12,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800636258] [2021-08-12 19:19:12,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:12,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:12,309 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) [2021-08-12 19:19:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:14,113 INFO L93 Difference]: Finished difference Result 435 states and 1227 transitions. [2021-08-12 19:19:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:14,114 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 [2021-08-12 19:19:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:14,115 INFO L225 Difference]: With dead ends: 435 [2021-08-12 19:19:14,115 INFO L226 Difference]: Without dead ends: 414 [2021-08-12 19:19:14,116 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:19:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-12 19:19:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 242. [2021-08-12 19:19:14,317 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) [2021-08-12 19:19:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 714 transitions. [2021-08-12 19:19:14,318 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 714 transitions. Word has length 18 [2021-08-12 19:19:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:14,318 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 714 transitions. [2021-08-12 19:19:14,318 INFO L483 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) [2021-08-12 19:19:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 714 transitions. [2021-08-12 19:19:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:14,319 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:14,319 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:14,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:14,535 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash -116472655, now seen corresponding path program 11 times [2021-08-12 19:19:14,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:14,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941569842] [2021-08-12 19:19:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:14,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:14,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941569842] [2021-08-12 19:19:14,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941569842] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:14,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:14,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:19:14,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434991875] [2021-08-12 19:19:14,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:19:14,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:14,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:19:14,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:19:14,573 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) [2021-08-12 19:19:15,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:15,532 INFO L93 Difference]: Finished difference Result 289 states and 823 transitions. [2021-08-12 19:19:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:19:15,533 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 [2021-08-12 19:19:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:15,534 INFO L225 Difference]: With dead ends: 289 [2021-08-12 19:19:15,534 INFO L226 Difference]: Without dead ends: 234 [2021-08-12 19:19:15,535 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:19:15,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-12 19:19:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 210. [2021-08-12 19:19:15,713 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) [2021-08-12 19:19:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 613 transitions. [2021-08-12 19:19:15,715 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 613 transitions. Word has length 18 [2021-08-12 19:19:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:15,715 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 613 transitions. [2021-08-12 19:19:15,715 INFO L483 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) [2021-08-12 19:19:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 613 transitions. [2021-08-12 19:19:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:15,715 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:15,715 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:15,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-08-12 19:19:15,716 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:15,716 INFO L82 PathProgramCache]: Analyzing trace with hash -9376803, now seen corresponding path program 56 times [2021-08-12 19:19:15,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:15,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861646079] [2021-08-12 19:19:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:15,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:15,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861646079] [2021-08-12 19:19:15,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861646079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:15,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443010338] [2021-08-12 19:19:15,758 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 [2021-08-12 19:19:15,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:15,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:15,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:15,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443010338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:15,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:15,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:19:15,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045713607] [2021-08-12 19:19:15,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:15,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:15,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:15,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:15,868 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) [2021-08-12 19:19:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:17,835 INFO L93 Difference]: Finished difference Result 429 states and 1176 transitions. [2021-08-12 19:19:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:17,835 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 [2021-08-12 19:19:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:17,837 INFO L225 Difference]: With dead ends: 429 [2021-08-12 19:19:17,837 INFO L226 Difference]: Without dead ends: 404 [2021-08-12 19:19:17,837 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:19:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-12 19:19:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 218. [2021-08-12 19:19:18,025 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) [2021-08-12 19:19:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 635 transitions. [2021-08-12 19:19:18,026 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 635 transitions. Word has length 18 [2021-08-12 19:19:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:18,026 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 635 transitions. [2021-08-12 19:19:18,026 INFO L483 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) [2021-08-12 19:19:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 635 transitions. [2021-08-12 19:19:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:18,027 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:18,027 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:18,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-08-12 19:19:18,242 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash 969180641, now seen corresponding path program 57 times [2021-08-12 19:19:18,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:18,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362422861] [2021-08-12 19:19:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:18,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:18,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362422861] [2021-08-12 19:19:18,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362422861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:18,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310464804] [2021-08-12 19:19:18,285 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 [2021-08-12 19:19:18,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:19:18,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:18,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:18,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310464804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:18,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:18,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:19:18,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709217292] [2021-08-12 19:19:18,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:18,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:18,373 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) [2021-08-12 19:19:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:20,149 INFO L93 Difference]: Finished difference Result 413 states and 1146 transitions. [2021-08-12 19:19:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:20,149 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 [2021-08-12 19:19:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:20,151 INFO L225 Difference]: With dead ends: 413 [2021-08-12 19:19:20,151 INFO L226 Difference]: Without dead ends: 392 [2021-08-12 19:19:20,151 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:19:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-12 19:19:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 209. [2021-08-12 19:19:20,325 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) [2021-08-12 19:19:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-08-12 19:19:20,326 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-08-12 19:19:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:20,326 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-08-12 19:19:20,326 INFO L483 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) [2021-08-12 19:19:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-08-12 19:19:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:20,327 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:20,327 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:20,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:20,542 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:20,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:20,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358893, now seen corresponding path program 58 times [2021-08-12 19:19:20,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:20,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643537383] [2021-08-12 19:19:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:20,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:20,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643537383] [2021-08-12 19:19:20,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643537383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:20,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632114290] [2021-08-12 19:19:20,587 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 [2021-08-12 19:19:20,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:19:20,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:20,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632114290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:20,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:20,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:19:20,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69774130] [2021-08-12 19:19:20,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:19:20,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:19:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:19:20,682 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) [2021-08-12 19:19:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:22,268 INFO L93 Difference]: Finished difference Result 373 states and 1028 transitions. [2021-08-12 19:19:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:22,269 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 [2021-08-12 19:19:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:22,270 INFO L225 Difference]: With dead ends: 373 [2021-08-12 19:19:22,270 INFO L226 Difference]: Without dead ends: 344 [2021-08-12 19:19:22,271 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:19:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-12 19:19:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 211. [2021-08-12 19:19:22,445 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) [2021-08-12 19:19:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 613 transitions. [2021-08-12 19:19:22,447 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 613 transitions. Word has length 18 [2021-08-12 19:19:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:22,447 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 613 transitions. [2021-08-12 19:19:22,447 INFO L483 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) [2021-08-12 19:19:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 613 transitions. [2021-08-12 19:19:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:22,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:22,447 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:22,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:22,663 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1750676137, now seen corresponding path program 59 times [2021-08-12 19:19:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:22,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179727993] [2021-08-12 19:19:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:22,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:22,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179727993] [2021-08-12 19:19:22,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179727993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:22,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460937683] [2021-08-12 19:19:22,711 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 [2021-08-12 19:19:22,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:22,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:22,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:22,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:22,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460937683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:22,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:22,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:19:22,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734107237] [2021-08-12 19:19:22,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:22,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:22,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:22,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:22,815 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) [2021-08-12 19:19:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:24,556 INFO L93 Difference]: Finished difference Result 365 states and 1010 transitions. [2021-08-12 19:19:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:24,557 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 [2021-08-12 19:19:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:24,558 INFO L225 Difference]: With dead ends: 365 [2021-08-12 19:19:24,558 INFO L226 Difference]: Without dead ends: 340 [2021-08-12 19:19:24,559 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-08-12 19:19:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 219. [2021-08-12 19:19:24,758 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) [2021-08-12 19:19:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 635 transitions. [2021-08-12 19:19:24,760 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 635 transitions. Word has length 18 [2021-08-12 19:19:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:24,760 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 635 transitions. [2021-08-12 19:19:24,760 INFO L483 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) [2021-08-12 19:19:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 635 transitions. [2021-08-12 19:19:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:24,760 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:24,760 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:24,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-08-12 19:19:24,977 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1565733715, now seen corresponding path program 60 times [2021-08-12 19:19:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:24,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14788257] [2021-08-12 19:19:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:25,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:25,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14788257] [2021-08-12 19:19:25,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14788257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973935219] [2021-08-12 19:19:25,022 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 [2021-08-12 19:19:25,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:19:25,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:25,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:25,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973935219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:25,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:25,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:19:25,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956849933] [2021-08-12 19:19:25,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:25,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:25,113 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) [2021-08-12 19:19:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:26,614 INFO L93 Difference]: Finished difference Result 340 states and 958 transitions. [2021-08-12 19:19:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:26,615 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 [2021-08-12 19:19:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:26,616 INFO L225 Difference]: With dead ends: 340 [2021-08-12 19:19:26,616 INFO L226 Difference]: Without dead ends: 319 [2021-08-12 19:19:26,617 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-12 19:19:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 209. [2021-08-12 19:19:26,805 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) [2021-08-12 19:19:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-08-12 19:19:26,807 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-08-12 19:19:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:26,807 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-08-12 19:19:26,807 INFO L483 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) [2021-08-12 19:19:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-08-12 19:19:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:26,807 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:26,807 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:27,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:27,008 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:27,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2071414893, now seen corresponding path program 61 times [2021-08-12 19:19:27,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:27,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094867153] [2021-08-12 19:19:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:27,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:27,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094867153] [2021-08-12 19:19:27,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094867153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:27,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490459618] [2021-08-12 19:19:27,066 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 [2021-08-12 19:19:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490459618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:27,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:27,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:19:27,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858602001] [2021-08-12 19:19:27,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:27,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:27,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:27,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:27,183 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) [2021-08-12 19:19:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:28,703 INFO L93 Difference]: Finished difference Result 371 states and 1030 transitions. [2021-08-12 19:19:28,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:28,703 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 [2021-08-12 19:19:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:28,705 INFO L225 Difference]: With dead ends: 371 [2021-08-12 19:19:28,705 INFO L226 Difference]: Without dead ends: 350 [2021-08-12 19:19:28,705 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:19:28,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-08-12 19:19:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 214. [2021-08-12 19:19:28,882 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) [2021-08-12 19:19:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 622 transitions. [2021-08-12 19:19:28,883 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 622 transitions. Word has length 18 [2021-08-12 19:19:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:28,883 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 622 transitions. [2021-08-12 19:19:28,884 INFO L483 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) [2021-08-12 19:19:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 622 transitions. [2021-08-12 19:19:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:28,884 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:28,884 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:29,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-08-12 19:19:29,097 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:29,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2067720571, now seen corresponding path program 62 times [2021-08-12 19:19:29,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:29,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214103216] [2021-08-12 19:19:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:29,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214103216] [2021-08-12 19:19:29,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214103216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205059573] [2021-08-12 19:19:29,155 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 [2021-08-12 19:19:29,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:29,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:29,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:29,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205059573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:29,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:29,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:19:29,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743032942] [2021-08-12 19:19:29,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:29,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:29,260 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) [2021-08-12 19:19:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:31,055 INFO L93 Difference]: Finished difference Result 414 states and 1123 transitions. [2021-08-12 19:19:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:31,056 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 [2021-08-12 19:19:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:31,057 INFO L225 Difference]: With dead ends: 414 [2021-08-12 19:19:31,057 INFO L226 Difference]: Without dead ends: 393 [2021-08-12 19:19:31,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:19:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-08-12 19:19:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-08-12 19:19:31,238 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) [2021-08-12 19:19:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 629 transitions. [2021-08-12 19:19:31,240 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 629 transitions. Word has length 18 [2021-08-12 19:19:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:31,240 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 629 transitions. [2021-08-12 19:19:31,240 INFO L483 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) [2021-08-12 19:19:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 629 transitions. [2021-08-12 19:19:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:31,240 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:31,240 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:31,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-08-12 19:19:31,457 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1297085549, now seen corresponding path program 63 times [2021-08-12 19:19:31,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:31,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591140098] [2021-08-12 19:19:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:31,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:31,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591140098] [2021-08-12 19:19:31,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591140098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:31,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110777740] [2021-08-12 19:19:31,504 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 [2021-08-12 19:19:31,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:19:31,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:31,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110777740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:31,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:31,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:19:31,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212866166] [2021-08-12 19:19:31,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:19:31,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:31,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:19:31,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:19:31,654 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) [2021-08-12 19:19:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:33,214 INFO L93 Difference]: Finished difference Result 377 states and 1037 transitions. [2021-08-12 19:19:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:33,214 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 [2021-08-12 19:19:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:33,216 INFO L225 Difference]: With dead ends: 377 [2021-08-12 19:19:33,216 INFO L226 Difference]: Without dead ends: 352 [2021-08-12 19:19:33,216 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:19:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-08-12 19:19:33,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-08-12 19:19:33,392 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) [2021-08-12 19:19:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-08-12 19:19:33,394 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-08-12 19:19:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:33,394 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-08-12 19:19:33,394 INFO L483 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) [2021-08-12 19:19:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-08-12 19:19:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:33,394 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:33,394 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:33,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:33,610 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:33,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:33,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1181922291, now seen corresponding path program 64 times [2021-08-12 19:19:33,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:33,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995533517] [2021-08-12 19:19:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:33,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:33,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995533517] [2021-08-12 19:19:33,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995533517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:33,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944659822] [2021-08-12 19:19:33,670 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 [2021-08-12 19:19:33,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:19:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:33,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944659822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:33,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:33,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:19:33,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065531198] [2021-08-12 19:19:33,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:33,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:33,789 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) [2021-08-12 19:19:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:35,492 INFO L93 Difference]: Finished difference Result 394 states and 1073 transitions. [2021-08-12 19:19:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:35,493 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 [2021-08-12 19:19:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:35,494 INFO L225 Difference]: With dead ends: 394 [2021-08-12 19:19:35,494 INFO L226 Difference]: Without dead ends: 373 [2021-08-12 19:19:35,495 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:19:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-12 19:19:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 216. [2021-08-12 19:19:35,680 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) [2021-08-12 19:19:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 631 transitions. [2021-08-12 19:19:35,682 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 631 transitions. Word has length 18 [2021-08-12 19:19:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:35,682 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 631 transitions. [2021-08-12 19:19:35,682 INFO L483 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) [2021-08-12 19:19:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 631 transitions. [2021-08-12 19:19:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:35,683 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:35,683 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:35,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:35,899 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:35,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2112083467, now seen corresponding path program 65 times [2021-08-12 19:19:35,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:35,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941631190] [2021-08-12 19:19:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:35,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:35,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941631190] [2021-08-12 19:19:35,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941631190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:35,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303095432] [2021-08-12 19:19:35,966 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:35,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:36,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303095432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:36,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:36,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:19:36,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044140949] [2021-08-12 19:19:36,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:19:36,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:19:36,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:19:36,075 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) [2021-08-12 19:19:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:37,849 INFO L93 Difference]: Finished difference Result 398 states and 1073 transitions. [2021-08-12 19:19:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:37,850 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 [2021-08-12 19:19:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:37,851 INFO L225 Difference]: With dead ends: 398 [2021-08-12 19:19:37,851 INFO L226 Difference]: Without dead ends: 373 [2021-08-12 19:19:37,851 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:19:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-12 19:19:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 214. [2021-08-12 19:19:38,034 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) [2021-08-12 19:19:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 624 transitions. [2021-08-12 19:19:38,035 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 624 transitions. Word has length 18 [2021-08-12 19:19:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:38,035 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 624 transitions. [2021-08-12 19:19:38,035 INFO L483 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) [2021-08-12 19:19:38,035 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 624 transitions. [2021-08-12 19:19:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:38,035 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:38,036 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:38,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-08-12 19:19:38,251 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1099390935, now seen corresponding path program 66 times [2021-08-12 19:19:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:38,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248393103] [2021-08-12 19:19:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:38,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:38,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248393103] [2021-08-12 19:19:38,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248393103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:38,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337457303] [2021-08-12 19:19:38,297 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 [2021-08-12 19:19:38,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:19:38,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:38,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:38,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:38,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337457303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:38,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:38,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:19:38,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12361888] [2021-08-12 19:19:38,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:38,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:38,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:38,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:38,392 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) [2021-08-12 19:19:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:39,930 INFO L93 Difference]: Finished difference Result 363 states and 1000 transitions. [2021-08-12 19:19:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:39,930 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 [2021-08-12 19:19:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:39,932 INFO L225 Difference]: With dead ends: 363 [2021-08-12 19:19:39,932 INFO L226 Difference]: Without dead ends: 334 [2021-08-12 19:19:39,932 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:19:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-12 19:19:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 212. [2021-08-12 19:19:40,114 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) [2021-08-12 19:19:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-08-12 19:19:40,115 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-08-12 19:19:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:40,115 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-08-12 19:19:40,115 INFO L483 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) [2021-08-12 19:19:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-08-12 19:19:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:40,116 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:40,116 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:40,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:40,331 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:40,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1459644047, now seen corresponding path program 67 times [2021-08-12 19:19:40,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:40,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648422049] [2021-08-12 19:19:40,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:40,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:40,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648422049] [2021-08-12 19:19:40,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648422049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:40,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452517949] [2021-08-12 19:19:40,379 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 [2021-08-12 19:19:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:40,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:40,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452517949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:40,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:40,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:19:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023400370] [2021-08-12 19:19:40,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:40,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:40,479 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) [2021-08-12 19:19:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:42,663 INFO L93 Difference]: Finished difference Result 493 states and 1357 transitions. [2021-08-12 19:19:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:42,663 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 [2021-08-12 19:19:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:42,665 INFO L225 Difference]: With dead ends: 493 [2021-08-12 19:19:42,665 INFO L226 Difference]: Without dead ends: 472 [2021-08-12 19:19:42,665 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:19:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-12 19:19:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 218. [2021-08-12 19:19:42,856 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) [2021-08-12 19:19:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 638 transitions. [2021-08-12 19:19:42,857 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 638 transitions. Word has length 18 [2021-08-12 19:19:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:42,857 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 638 transitions. [2021-08-12 19:19:42,857 INFO L483 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) [2021-08-12 19:19:42,857 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 638 transitions. [2021-08-12 19:19:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:42,858 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:42,858 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:43,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:43,075 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1303812215, now seen corresponding path program 68 times [2021-08-12 19:19:43,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:43,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201634186] [2021-08-12 19:19:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:43,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:43,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201634186] [2021-08-12 19:19:43,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201634186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:43,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290612279] [2021-08-12 19:19:43,128 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) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:43,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:43,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:43,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:43,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290612279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:43,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:43,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:19:43,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316752929] [2021-08-12 19:19:43,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:43,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:43,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:43,233 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) [2021-08-12 19:19:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:45,640 INFO L93 Difference]: Finished difference Result 528 states and 1430 transitions. [2021-08-12 19:19:45,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:45,640 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 [2021-08-12 19:19:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:45,642 INFO L225 Difference]: With dead ends: 528 [2021-08-12 19:19:45,642 INFO L226 Difference]: Without dead ends: 507 [2021-08-12 19:19:45,642 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:19:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-12 19:19:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 222. [2021-08-12 19:19:45,844 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) [2021-08-12 19:19:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 654 transitions. [2021-08-12 19:19:45,846 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 654 transitions. Word has length 18 [2021-08-12 19:19:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:45,846 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 654 transitions. [2021-08-12 19:19:45,846 INFO L483 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) [2021-08-12 19:19:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 654 transitions. [2021-08-12 19:19:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:45,846 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:45,846 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:46,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:46,062 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2060993905, now seen corresponding path program 69 times [2021-08-12 19:19:46,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:46,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533897426] [2021-08-12 19:19:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:46,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533897426] [2021-08-12 19:19:46,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533897426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407769180] [2021-08-12 19:19:46,106 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 [2021-08-12 19:19:46,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:19:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:46,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:46,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:46,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407769180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:46,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:46,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:19:46,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697669473] [2021-08-12 19:19:46,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:19:46,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:46,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:19:46,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:19:46,212 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) [2021-08-12 19:19:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:48,359 INFO L93 Difference]: Finished difference Result 491 states and 1344 transitions. [2021-08-12 19:19:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:48,360 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 [2021-08-12 19:19:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:48,361 INFO L225 Difference]: With dead ends: 491 [2021-08-12 19:19:48,361 INFO L226 Difference]: Without dead ends: 466 [2021-08-12 19:19:48,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:19:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-08-12 19:19:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 222. [2021-08-12 19:19:48,556 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) [2021-08-12 19:19:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 650 transitions. [2021-08-12 19:19:48,557 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 650 transitions. Word has length 18 [2021-08-12 19:19:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:48,557 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 650 transitions. [2021-08-12 19:19:48,557 INFO L483 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) [2021-08-12 19:19:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 650 transitions. [2021-08-12 19:19:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:48,558 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:48,558 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:48,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:48,775 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:48,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1255509907, now seen corresponding path program 70 times [2021-08-12 19:19:48,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:48,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687083459] [2021-08-12 19:19:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:48,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:48,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687083459] [2021-08-12 19:19:48,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687083459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:48,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888774637] [2021-08-12 19:19:48,822 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 [2021-08-12 19:19:48,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:19:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:48,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:48,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888774637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:48,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:48,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:19:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013701572] [2021-08-12 19:19:48,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:48,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:48,921 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) [2021-08-12 19:19:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:50,848 INFO L93 Difference]: Finished difference Result 454 states and 1262 transitions. [2021-08-12 19:19:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:50,849 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 [2021-08-12 19:19:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:50,851 INFO L225 Difference]: With dead ends: 454 [2021-08-12 19:19:50,851 INFO L226 Difference]: Without dead ends: 433 [2021-08-12 19:19:50,851 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:19:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-12 19:19:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 217. [2021-08-12 19:19:51,033 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) [2021-08-12 19:19:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 637 transitions. [2021-08-12 19:19:51,034 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 637 transitions. Word has length 18 [2021-08-12 19:19:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:51,035 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 637 transitions. [2021-08-12 19:19:51,035 INFO L483 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) [2021-08-12 19:19:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 637 transitions. [2021-08-12 19:19:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:51,035 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:51,035 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:51,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:51,255 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1030444307, now seen corresponding path program 71 times [2021-08-12 19:19:51,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:51,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714493577] [2021-08-12 19:19:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:51,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714493577] [2021-08-12 19:19:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714493577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227621926] [2021-08-12 19:19:51,303 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) [2021-08-12 19:19:51,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:51,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:51,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:51,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227621926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:51,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:51,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:19:51,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316897480] [2021-08-12 19:19:51,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:19:51,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:19:51,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:19:51,399 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) [2021-08-12 19:19:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:53,242 INFO L93 Difference]: Finished difference Result 435 states and 1229 transitions. [2021-08-12 19:19:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:53,242 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 [2021-08-12 19:19:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:53,244 INFO L225 Difference]: With dead ends: 435 [2021-08-12 19:19:53,244 INFO L226 Difference]: Without dead ends: 414 [2021-08-12 19:19:53,244 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:19:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-12 19:19:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 221. [2021-08-12 19:19:53,434 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) [2021-08-12 19:19:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 657 transitions. [2021-08-12 19:19:53,436 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 657 transitions. Word has length 18 [2021-08-12 19:19:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:53,436 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 657 transitions. [2021-08-12 19:19:53,436 INFO L483 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) [2021-08-12 19:19:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 657 transitions. [2021-08-12 19:19:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:53,436 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:53,436 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:53,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-08-12 19:19:53,652 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:53,652 INFO L82 PathProgramCache]: Analyzing trace with hash -668276081, now seen corresponding path program 72 times [2021-08-12 19:19:53,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:53,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782051281] [2021-08-12 19:19:53,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:53,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:53,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782051281] [2021-08-12 19:19:53,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782051281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:53,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360792176] [2021-08-12 19:19:53,691 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 [2021-08-12 19:19:53,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:19:53,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:53,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:53,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:53,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360792176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:53,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:53,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:19:53,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398416974] [2021-08-12 19:19:53,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:19:53,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:53,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:19:53,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:19:53,780 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) [2021-08-12 19:19:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:55,502 INFO L93 Difference]: Finished difference Result 406 states and 1163 transitions. [2021-08-12 19:19:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:55,503 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 [2021-08-12 19:19:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:55,505 INFO L225 Difference]: With dead ends: 406 [2021-08-12 19:19:55,505 INFO L226 Difference]: Without dead ends: 385 [2021-08-12 19:19:55,505 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:19:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-08-12 19:19:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 213. [2021-08-12 19:19:55,689 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) [2021-08-12 19:19:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 621 transitions. [2021-08-12 19:19:55,691 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 621 transitions. Word has length 18 [2021-08-12 19:19:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:55,691 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 621 transitions. [2021-08-12 19:19:55,691 INFO L483 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) [2021-08-12 19:19:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 621 transitions. [2021-08-12 19:19:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:55,691 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:55,691 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:55,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:55,908 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash -188192517, now seen corresponding path program 73 times [2021-08-12 19:19:55,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:55,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894604118] [2021-08-12 19:19:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:55,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:55,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894604118] [2021-08-12 19:19:55,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894604118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:55,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544409944] [2021-08-12 19:19:55,970 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 [2021-08-12 19:19:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:55,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:56,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544409944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:56,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:56,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:19:56,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208166657] [2021-08-12 19:19:56,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:56,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:56,068 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) [2021-08-12 19:19:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:58,367 INFO L93 Difference]: Finished difference Result 504 states and 1409 transitions. [2021-08-12 19:19:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:58,367 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 [2021-08-12 19:19:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:58,369 INFO L225 Difference]: With dead ends: 504 [2021-08-12 19:19:58,369 INFO L226 Difference]: Without dead ends: 483 [2021-08-12 19:19:58,369 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:19:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-12 19:19:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 219. [2021-08-12 19:19:58,564 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) [2021-08-12 19:19:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-08-12 19:19:58,565 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 18 [2021-08-12 19:19:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:58,565 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-08-12 19:19:58,566 INFO L483 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) [2021-08-12 19:19:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-08-12 19:19:58,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:58,566 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:58,566 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:58,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-08-12 19:19:58,773 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:58,773 INFO L82 PathProgramCache]: Analyzing trace with hash 741968659, now seen corresponding path program 74 times [2021-08-12 19:19:58,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:58,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918124706] [2021-08-12 19:19:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:58,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:58,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918124706] [2021-08-12 19:19:58,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918124706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:58,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599546982] [2021-08-12 19:19:58,837 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 [2021-08-12 19:19:58,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:58,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:58,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:58,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:58,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599546982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:58,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:58,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:19:58,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346855416] [2021-08-12 19:19:58,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:19:58,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:19:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:19:58,953 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) [2021-08-12 19:20:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:01,215 INFO L93 Difference]: Finished difference Result 492 states and 1369 transitions. [2021-08-12 19:20:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:01,215 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 [2021-08-12 19:20:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:01,217 INFO L225 Difference]: With dead ends: 492 [2021-08-12 19:20:01,217 INFO L226 Difference]: Without dead ends: 467 [2021-08-12 19:20:01,218 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:20:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-12 19:20:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 221. [2021-08-12 19:20:01,423 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) [2021-08-12 19:20:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 649 transitions. [2021-08-12 19:20:01,425 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 649 transitions. Word has length 18 [2021-08-12 19:20:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:01,425 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 649 transitions. [2021-08-12 19:20:01,425 INFO L483 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) [2021-08-12 19:20:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 649 transitions. [2021-08-12 19:20:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:01,426 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:01,426 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:01,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:01,648 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash 82317175, now seen corresponding path program 75 times [2021-08-12 19:20:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:01,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883122664] [2021-08-12 19:20:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:01,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:01,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883122664] [2021-08-12 19:20:01,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883122664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:01,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339506004] [2021-08-12 19:20:01,727 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 [2021-08-12 19:20:01,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:20:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:01,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:01,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339506004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:01,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:01,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-12 19:20:01,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659125952] [2021-08-12 19:20:01,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:20:01,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:01,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:20:01,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:01,883 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) [2021-08-12 19:20:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:04,759 INFO L93 Difference]: Finished difference Result 507 states and 1412 transitions. [2021-08-12 19:20:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:04,759 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 [2021-08-12 19:20:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:04,762 INFO L225 Difference]: With dead ends: 507 [2021-08-12 19:20:04,762 INFO L226 Difference]: Without dead ends: 486 [2021-08-12 19:20:04,762 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-12 19:20:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 218. [2021-08-12 19:20:04,962 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) [2021-08-12 19:20:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 646 transitions. [2021-08-12 19:20:04,964 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 646 transitions. Word has length 18 [2021-08-12 19:20:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:04,964 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 646 transitions. [2021-08-12 19:20:04,964 INFO L483 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) [2021-08-12 19:20:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 646 transitions. [2021-08-12 19:20:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:04,964 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:04,964 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:05,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-08-12 19:20:05,181 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash -98811273, now seen corresponding path program 76 times [2021-08-12 19:20:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:05,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284868931] [2021-08-12 19:20:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:05,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:05,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284868931] [2021-08-12 19:20:05,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284868931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:05,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187685604] [2021-08-12 19:20:05,234 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) [2021-08-12 19:20:05,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:05,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:05,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:05,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187685604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:05,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:05,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:05,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713739343] [2021-08-12 19:20:05,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:05,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:05,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:05,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:05,328 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) [2021-08-12 19:20:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:08,327 INFO L93 Difference]: Finished difference Result 488 states and 1383 transitions. [2021-08-12 19:20:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:08,327 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 [2021-08-12 19:20:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:08,330 INFO L225 Difference]: With dead ends: 488 [2021-08-12 19:20:08,330 INFO L226 Difference]: Without dead ends: 467 [2021-08-12 19:20:08,330 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:08,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-12 19:20:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 214. [2021-08-12 19:20:08,608 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) [2021-08-12 19:20:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 626 transitions. [2021-08-12 19:20:08,609 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 626 transitions. Word has length 18 [2021-08-12 19:20:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:08,610 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 626 transitions. [2021-08-12 19:20:08,610 INFO L483 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) [2021-08-12 19:20:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 626 transitions. [2021-08-12 19:20:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:08,610 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:08,610 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:08,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-08-12 19:20:08,825 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1980104049, now seen corresponding path program 77 times [2021-08-12 19:20:08,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:08,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045781381] [2021-08-12 19:20:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:08,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:08,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045781381] [2021-08-12 19:20:08,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045781381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:08,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675483938] [2021-08-12 19:20:08,867 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 [2021-08-12 19:20:08,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:08,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:08,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:08,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:08,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675483938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:08,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:08,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:08,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775971954] [2021-08-12 19:20:08,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:08,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:08,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:08,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:08,962 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) [2021-08-12 19:20:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:11,096 INFO L93 Difference]: Finished difference Result 445 states and 1248 transitions. [2021-08-12 19:20:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:11,097 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 [2021-08-12 19:20:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:11,098 INFO L225 Difference]: With dead ends: 445 [2021-08-12 19:20:11,099 INFO L226 Difference]: Without dead ends: 420 [2021-08-12 19:20:11,099 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-12 19:20:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 222. [2021-08-12 19:20:11,314 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) [2021-08-12 19:20:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 648 transitions. [2021-08-12 19:20:11,316 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 648 transitions. Word has length 18 [2021-08-12 19:20:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:11,316 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 648 transitions. [2021-08-12 19:20:11,316 INFO L483 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) [2021-08-12 19:20:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 648 transitions. [2021-08-12 19:20:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:11,317 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:11,317 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:11,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-08-12 19:20:11,533 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:11,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:11,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1001546605, now seen corresponding path program 78 times [2021-08-12 19:20:11,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:11,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795077109] [2021-08-12 19:20:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:11,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:11,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795077109] [2021-08-12 19:20:11,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795077109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:11,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146570968] [2021-08-12 19:20:11,578 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 [2021-08-12 19:20:11,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:20:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:11,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:11,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146570968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:11,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:11,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:11,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520673874] [2021-08-12 19:20:11,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:11,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:11,676 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) [2021-08-12 19:20:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:13,829 INFO L93 Difference]: Finished difference Result 429 states and 1218 transitions. [2021-08-12 19:20:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:13,829 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 [2021-08-12 19:20:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:13,831 INFO L225 Difference]: With dead ends: 429 [2021-08-12 19:20:13,831 INFO L226 Difference]: Without dead ends: 408 [2021-08-12 19:20:13,831 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-08-12 19:20:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 212. [2021-08-12 19:20:14,028 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) [2021-08-12 19:20:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-08-12 19:20:14,029 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-08-12 19:20:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:14,030 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-08-12 19:20:14,030 INFO L483 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) [2021-08-12 19:20:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-08-12 19:20:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:14,030 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:14,030 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:14,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-08-12 19:20:14,245 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2120551441, now seen corresponding path program 79 times [2021-08-12 19:20:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:14,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542954132] [2021-08-12 19:20:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:14,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:14,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542954132] [2021-08-12 19:20:14,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542954132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:14,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260629822] [2021-08-12 19:20:14,301 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 [2021-08-12 19:20:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:14,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260629822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:14,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:14,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:20:14,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356338196] [2021-08-12 19:20:14,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:20:14,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:20:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:20:14,398 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) [2021-08-12 19:20:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:16,537 INFO L93 Difference]: Finished difference Result 426 states and 1185 transitions. [2021-08-12 19:20:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:16,537 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 [2021-08-12 19:20:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:16,539 INFO L225 Difference]: With dead ends: 426 [2021-08-12 19:20:16,539 INFO L226 Difference]: Without dead ends: 405 [2021-08-12 19:20:16,540 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:20:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-08-12 19:20:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 217. [2021-08-12 19:20:16,755 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) [2021-08-12 19:20:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 636 transitions. [2021-08-12 19:20:16,757 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 636 transitions. Word has length 18 [2021-08-12 19:20:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:16,757 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 636 transitions. [2021-08-12 19:20:16,757 INFO L483 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) [2021-08-12 19:20:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 636 transitions. [2021-08-12 19:20:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:16,758 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:16,758 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:16,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-08-12 19:20:16,969 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1190390265, now seen corresponding path program 80 times [2021-08-12 19:20:16,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:16,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598411429] [2021-08-12 19:20:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:17,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:17,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598411429] [2021-08-12 19:20:17,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598411429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:17,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464268244] [2021-08-12 19:20:17,027 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 [2021-08-12 19:20:17,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:17,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:17,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:17,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:17,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464268244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:17,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:17,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:17,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851196063] [2021-08-12 19:20:17,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:17,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:17,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:17,134 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) [2021-08-12 19:20:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:19,690 INFO L93 Difference]: Finished difference Result 430 states and 1185 transitions. [2021-08-12 19:20:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:19,691 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 [2021-08-12 19:20:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:19,693 INFO L225 Difference]: With dead ends: 430 [2021-08-12 19:20:19,693 INFO L226 Difference]: Without dead ends: 405 [2021-08-12 19:20:19,694 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:20:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-08-12 19:20:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 215. [2021-08-12 19:20:19,912 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) [2021-08-12 19:20:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 629 transitions. [2021-08-12 19:20:19,914 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 629 transitions. Word has length 18 [2021-08-12 19:20:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:19,914 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 629 transitions. [2021-08-12 19:20:19,914 INFO L483 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) [2021-08-12 19:20:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 629 transitions. [2021-08-12 19:20:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:19,914 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:19,914 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:20,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:20,133 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2091884499, now seen corresponding path program 81 times [2021-08-12 19:20:20,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:20,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650612912] [2021-08-12 19:20:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:20,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650612912] [2021-08-12 19:20:20,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650612912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780623456] [2021-08-12 19:20:20,181 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 [2021-08-12 19:20:20,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:20:20,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:20,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:20,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780623456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:20,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:20,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:20:20,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046538512] [2021-08-12 19:20:20,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:20:20,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:20:20,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:20:20,280 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) [2021-08-12 19:20:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:22,639 INFO L93 Difference]: Finished difference Result 424 states and 1166 transitions. [2021-08-12 19:20:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:22,640 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 [2021-08-12 19:20:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:22,642 INFO L225 Difference]: With dead ends: 424 [2021-08-12 19:20:22,642 INFO L226 Difference]: Without dead ends: 395 [2021-08-12 19:20:22,643 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-12 19:20:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 213. [2021-08-12 19:20:22,874 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) [2021-08-12 19:20:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-08-12 19:20:22,876 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-08-12 19:20:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:22,877 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-08-12 19:20:22,877 INFO L483 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) [2021-08-12 19:20:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-08-12 19:20:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:22,877 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:22,877 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:23,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-08-12 19:20:23,099 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:23,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1036814989, now seen corresponding path program 82 times [2021-08-12 19:20:23,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:23,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311103626] [2021-08-12 19:20:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:23,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:23,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311103626] [2021-08-12 19:20:23,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311103626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:23,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138383902] [2021-08-12 19:20:23,167 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 [2021-08-12 19:20:23,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:23,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:23,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:23,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138383902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:23,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:23,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:20:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613289633] [2021-08-12 19:20:23,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:20:23,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:20:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:20:23,274 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) [2021-08-12 19:20:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:25,752 INFO L93 Difference]: Finished difference Result 443 states and 1209 transitions. [2021-08-12 19:20:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:25,752 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 [2021-08-12 19:20:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:25,754 INFO L225 Difference]: With dead ends: 443 [2021-08-12 19:20:25,754 INFO L226 Difference]: Without dead ends: 422 [2021-08-12 19:20:25,755 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:20:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-12 19:20:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 219. [2021-08-12 19:20:26,038 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) [2021-08-12 19:20:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 649 transitions. [2021-08-12 19:20:26,040 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 649 transitions. Word has length 18 [2021-08-12 19:20:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:26,040 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 649 transitions. [2021-08-12 19:20:26,040 INFO L483 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) [2021-08-12 19:20:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 649 transitions. [2021-08-12 19:20:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:26,041 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:26,041 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:26,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-08-12 19:20:26,260 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:26,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:26,260 INFO L82 PathProgramCache]: Analyzing trace with hash -106653813, now seen corresponding path program 83 times [2021-08-12 19:20:26,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:26,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340063006] [2021-08-12 19:20:26,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:26,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:26,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340063006] [2021-08-12 19:20:26,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340063006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:26,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257825591] [2021-08-12 19:20:26,317 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 [2021-08-12 19:20:26,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:26,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:26,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:26,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257825591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:26,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:26,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:26,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99457633] [2021-08-12 19:20:26,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:26,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:26,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:26,434 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) [2021-08-12 19:20:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:28,769 INFO L93 Difference]: Finished difference Result 447 states and 1209 transitions. [2021-08-12 19:20:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:28,770 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 [2021-08-12 19:20:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:28,772 INFO L225 Difference]: With dead ends: 447 [2021-08-12 19:20:28,772 INFO L226 Difference]: Without dead ends: 422 [2021-08-12 19:20:28,772 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-12 19:20:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 221. [2021-08-12 19:20:28,974 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) [2021-08-12 19:20:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 650 transitions. [2021-08-12 19:20:28,976 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 650 transitions. Word has length 18 [2021-08-12 19:20:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:28,976 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 650 transitions. [2021-08-12 19:20:28,976 INFO L483 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) [2021-08-12 19:20:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 650 transitions. [2021-08-12 19:20:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:28,976 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:28,976 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:29,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:29,193 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash -766305297, now seen corresponding path program 84 times [2021-08-12 19:20:29,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:29,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091822725] [2021-08-12 19:20:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:29,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:29,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091822725] [2021-08-12 19:20:29,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091822725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:29,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059821356] [2021-08-12 19:20:29,259 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 [2021-08-12 19:20:29,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:20:29,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:29,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059821356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:29,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:29,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-12 19:20:29,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983257451] [2021-08-12 19:20:29,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:20:29,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:29,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:20:29,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:29,401 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) [2021-08-12 19:20:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:31,527 INFO L93 Difference]: Finished difference Result 416 states and 1144 transitions. [2021-08-12 19:20:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:31,528 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 [2021-08-12 19:20:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:31,530 INFO L225 Difference]: With dead ends: 416 [2021-08-12 19:20:31,530 INFO L226 Difference]: Without dead ends: 395 [2021-08-12 19:20:31,531 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-12 19:20:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 218. [2021-08-12 19:20:31,787 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) [2021-08-12 19:20:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 647 transitions. [2021-08-12 19:20:31,789 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 647 transitions. Word has length 18 [2021-08-12 19:20:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:31,789 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 647 transitions. [2021-08-12 19:20:31,789 INFO L483 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) [2021-08-12 19:20:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 647 transitions. [2021-08-12 19:20:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:31,790 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:31,790 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:32,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-08-12 19:20:32,007 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:32,007 INFO L82 PathProgramCache]: Analyzing trace with hash -947433745, now seen corresponding path program 85 times [2021-08-12 19:20:32,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:32,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804893662] [2021-08-12 19:20:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:32,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:32,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804893662] [2021-08-12 19:20:32,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804893662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:32,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597044436] [2021-08-12 19:20:32,047 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 [2021-08-12 19:20:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:32,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597044436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:32,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:32,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:32,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240209933] [2021-08-12 19:20:32,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:32,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:32,145 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) [2021-08-12 19:20:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:33,897 INFO L93 Difference]: Finished difference Result 388 states and 1093 transitions. [2021-08-12 19:20:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:33,897 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 [2021-08-12 19:20:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:33,899 INFO L225 Difference]: With dead ends: 388 [2021-08-12 19:20:33,899 INFO L226 Difference]: Without dead ends: 367 [2021-08-12 19:20:33,899 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-12 19:20:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 214. [2021-08-12 19:20:34,093 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) [2021-08-12 19:20:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 627 transitions. [2021-08-12 19:20:34,094 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 627 transitions. Word has length 18 [2021-08-12 19:20:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:34,095 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 627 transitions. [2021-08-12 19:20:34,095 INFO L483 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) [2021-08-12 19:20:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 627 transitions. [2021-08-12 19:20:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:34,095 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:34,095 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:34,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:34,311 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1466240775, now seen corresponding path program 86 times [2021-08-12 19:20:34,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:34,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589061446] [2021-08-12 19:20:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:34,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:34,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589061446] [2021-08-12 19:20:34,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589061446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:34,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017559648] [2021-08-12 19:20:34,352 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 [2021-08-12 19:20:34,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:34,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:34,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017559648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:34,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:34,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:20:34,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187717458] [2021-08-12 19:20:34,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:20:34,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:34,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:20:34,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:20:34,492 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) [2021-08-12 19:20:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:36,772 INFO L93 Difference]: Finished difference Result 424 states and 1168 transitions. [2021-08-12 19:20:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:36,772 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 [2021-08-12 19:20:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:36,774 INFO L225 Difference]: With dead ends: 424 [2021-08-12 19:20:36,774 INFO L226 Difference]: Without dead ends: 399 [2021-08-12 19:20:36,774 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:20:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-12 19:20:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 222. [2021-08-12 19:20:37,015 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) [2021-08-12 19:20:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 649 transitions. [2021-08-12 19:20:37,017 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 649 transitions. Word has length 18 [2021-08-12 19:20:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:37,017 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 649 transitions. [2021-08-12 19:20:37,017 INFO L483 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) [2021-08-12 19:20:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 649 transitions. [2021-08-12 19:20:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:37,017 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:37,017 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:37,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:37,238 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:37,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1850169077, now seen corresponding path program 87 times [2021-08-12 19:20:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:37,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430146312] [2021-08-12 19:20:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:37,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:37,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430146312] [2021-08-12 19:20:37,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430146312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:37,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681263348] [2021-08-12 19:20:37,293 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 [2021-08-12 19:20:37,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:20:37,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:37,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681263348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:37,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:37,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:37,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721500330] [2021-08-12 19:20:37,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:37,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:37,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:37,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:37,477 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) [2021-08-12 19:20:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:39,462 INFO L93 Difference]: Finished difference Result 408 states and 1138 transitions. [2021-08-12 19:20:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:39,462 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 [2021-08-12 19:20:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:39,464 INFO L225 Difference]: With dead ends: 408 [2021-08-12 19:20:39,464 INFO L226 Difference]: Without dead ends: 387 [2021-08-12 19:20:39,464 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-08-12 19:20:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 213. [2021-08-12 19:20:39,666 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) [2021-08-12 19:20:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-08-12 19:20:39,668 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-08-12 19:20:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:39,668 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-08-12 19:20:39,668 INFO L483 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) [2021-08-12 19:20:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-08-12 19:20:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:39,670 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:39,670 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:39,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-08-12 19:20:39,886 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash -687990825, now seen corresponding path program 88 times [2021-08-12 19:20:39,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:39,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367565053] [2021-08-12 19:20:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:39,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:39,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367565053] [2021-08-12 19:20:39,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367565053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:39,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119191966] [2021-08-12 19:20:39,941 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 [2021-08-12 19:20:39,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:39,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:40,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119191966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:40,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:40,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:20:40,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587767373] [2021-08-12 19:20:40,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:20:40,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:20:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:20:40,047 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) [2021-08-12 19:20:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:41,887 INFO L93 Difference]: Finished difference Result 368 states and 1020 transitions. [2021-08-12 19:20:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:41,887 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 [2021-08-12 19:20:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:41,889 INFO L225 Difference]: With dead ends: 368 [2021-08-12 19:20:41,889 INFO L226 Difference]: Without dead ends: 339 [2021-08-12 19:20:41,889 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-12 19:20:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 215. [2021-08-12 19:20:42,094 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) [2021-08-12 19:20:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 627 transitions. [2021-08-12 19:20:42,096 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 627 transitions. Word has length 18 [2021-08-12 19:20:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:42,096 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 627 transitions. [2021-08-12 19:20:42,096 INFO L483 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) [2021-08-12 19:20:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 627 transitions. [2021-08-12 19:20:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:42,096 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:42,096 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:42,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-08-12 19:20:42,313 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1068673581, now seen corresponding path program 89 times [2021-08-12 19:20:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:42,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756953698] [2021-08-12 19:20:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:42,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:42,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756953698] [2021-08-12 19:20:42,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756953698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:42,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082464450] [2021-08-12 19:20:42,366 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 [2021-08-12 19:20:42,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:42,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:42,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:42,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082464450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:42,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:42,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159091811] [2021-08-12 19:20:42,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:42,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:42,469 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) [2021-08-12 19:20:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:44,165 INFO L93 Difference]: Finished difference Result 360 states and 1002 transitions. [2021-08-12 19:20:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:44,165 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 [2021-08-12 19:20:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:44,167 INFO L225 Difference]: With dead ends: 360 [2021-08-12 19:20:44,167 INFO L226 Difference]: Without dead ends: 335 [2021-08-12 19:20:44,167 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:20:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-08-12 19:20:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 223. [2021-08-12 19:20:44,387 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) [2021-08-12 19:20:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 649 transitions. [2021-08-12 19:20:44,388 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 649 transitions. Word has length 18 [2021-08-12 19:20:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:44,388 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 649 transitions. [2021-08-12 19:20:44,388 INFO L483 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) [2021-08-12 19:20:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 649 transitions. [2021-08-12 19:20:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:20:44,389 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:44,389 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:44,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:44,605 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:44,606 INFO L82 PathProgramCache]: Analyzing trace with hash -90116137, now seen corresponding path program 90 times [2021-08-12 19:20:44,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:44,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530853930] [2021-08-12 19:20:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:44,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:44,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530853930] [2021-08-12 19:20:44,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530853930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:44,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487116192] [2021-08-12 19:20:44,688 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 [2021-08-12 19:20:44,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:20:44,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:44,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:20:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:44,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487116192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:44,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:44,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:20:44,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522190511] [2021-08-12 19:20:44,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:44,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:44,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:44,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:44,791 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) [2021-08-12 19:20:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:46,320 INFO L93 Difference]: Finished difference Result 335 states and 950 transitions. [2021-08-12 19:20:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:46,321 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 [2021-08-12 19:20:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:46,322 INFO L225 Difference]: With dead ends: 335 [2021-08-12 19:20:46,322 INFO L226 Difference]: Without dead ends: 314 [2021-08-12 19:20:46,323 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:20:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-12 19:20:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 212. [2021-08-12 19:20:46,526 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) [2021-08-12 19:20:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-08-12 19:20:46,528 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-08-12 19:20:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:46,528 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-08-12 19:20:46,528 INFO L483 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) [2021-08-12 19:20:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-08-12 19:20:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:20:46,528 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:46,528 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:46,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-08-12 19:20:46,745 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1714954922, now seen corresponding path program 1 times [2021-08-12 19:20:46,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:46,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314732414] [2021-08-12 19:20:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:46,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:46,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314732414] [2021-08-12 19:20:46,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314732414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:46,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314537940] [2021-08-12 19:20:46,769 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 [2021-08-12 19:20:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:46,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:20:46,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:46,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314537940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:46,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:46,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:20:46,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225454570] [2021-08-12 19:20:46,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:20:46,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:20:46,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:20:46,844 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) [2021-08-12 19:20:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:48,042 INFO L93 Difference]: Finished difference Result 336 states and 952 transitions. [2021-08-12 19:20:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:20:48,042 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 [2021-08-12 19:20:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:48,044 INFO L225 Difference]: With dead ends: 336 [2021-08-12 19:20:48,044 INFO L226 Difference]: Without dead ends: 282 [2021-08-12 19:20:48,044 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:20:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-08-12 19:20:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 219. [2021-08-12 19:20:48,269 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) [2021-08-12 19:20:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 638 transitions. [2021-08-12 19:20:48,271 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 638 transitions. Word has length 19 [2021-08-12 19:20:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:48,271 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 638 transitions. [2021-08-12 19:20:48,271 INFO L483 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) [2021-08-12 19:20:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 638 transitions. [2021-08-12 19:20:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:20:48,271 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:48,271 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:48,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:48,472 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1799002545, now seen corresponding path program 1 times [2021-08-12 19:20:48,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:48,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689124178] [2021-08-12 19:20:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:48,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:48,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689124178] [2021-08-12 19:20:48,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689124178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:48,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439027507] [2021-08-12 19:20:48,506 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 [2021-08-12 19:20:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:20:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:48,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439027507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:48,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:48,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:20:48,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745083678] [2021-08-12 19:20:48,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:20:48,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:48,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:20:48,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:20:48,592 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) [2021-08-12 19:20:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:50,217 INFO L93 Difference]: Finished difference Result 388 states and 1116 transitions. [2021-08-12 19:20:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:20:50,218 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 [2021-08-12 19:20:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:50,219 INFO L225 Difference]: With dead ends: 388 [2021-08-12 19:20:50,219 INFO L226 Difference]: Without dead ends: 359 [2021-08-12 19:20:50,220 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:20:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-12 19:20:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 230. [2021-08-12 19:20:50,502 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) [2021-08-12 19:20:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 682 transitions. [2021-08-12 19:20:50,504 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 682 transitions. Word has length 19 [2021-08-12 19:20:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:50,518 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 682 transitions. [2021-08-12 19:20:50,518 INFO L483 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) [2021-08-12 19:20:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 682 transitions. [2021-08-12 19:20:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:20:50,518 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:50,518 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:50,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-08-12 19:20:50,733 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:50,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2143819529, now seen corresponding path program 2 times [2021-08-12 19:20:50,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:50,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571462401] [2021-08-12 19:20:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:50,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:50,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571462401] [2021-08-12 19:20:50,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571462401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:50,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521508321] [2021-08-12 19:20:50,756 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 [2021-08-12 19:20:50,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:50,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:20:50,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:50,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521508321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:50,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:50,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:20:50,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89092612] [2021-08-12 19:20:50,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:20:50,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:50,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:20:50,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:20:50,833 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) [2021-08-12 19:20:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:52,618 INFO L93 Difference]: Finished difference Result 400 states and 1143 transitions. [2021-08-12 19:20:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:20:52,618 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 [2021-08-12 19:20:52,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:52,621 INFO L225 Difference]: With dead ends: 400 [2021-08-12 19:20:52,621 INFO L226 Difference]: Without dead ends: 363 [2021-08-12 19:20:52,621 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:20:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-12 19:20:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 246. [2021-08-12 19:20:52,957 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) [2021-08-12 19:20:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-08-12 19:20:52,960 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-08-12 19:20:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:52,960 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-08-12 19:20:52,960 INFO L483 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) [2021-08-12 19:20:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-08-12 19:20:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:20:52,960 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:52,960 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:53,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-08-12 19:20:53,167 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:53,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2111872576, now seen corresponding path program 2 times [2021-08-12 19:20:53,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:53,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903727531] [2021-08-12 19:20:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:53,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:53,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903727531] [2021-08-12 19:20:53,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903727531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:53,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351033721] [2021-08-12 19:20:53,202 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 [2021-08-12 19:20:53,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:53,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:20:53,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:53,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351033721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:53,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:53,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:20:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926223752] [2021-08-12 19:20:53,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:20:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:20:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:20:53,281 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) [2021-08-12 19:20:54,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:54,846 INFO L93 Difference]: Finished difference Result 390 states and 1125 transitions. [2021-08-12 19:20:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:20:54,846 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 [2021-08-12 19:20:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:54,848 INFO L225 Difference]: With dead ends: 390 [2021-08-12 19:20:54,848 INFO L226 Difference]: Without dead ends: 360 [2021-08-12 19:20:54,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-12 19:20:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 250. [2021-08-12 19:20:55,097 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) [2021-08-12 19:20:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 754 transitions. [2021-08-12 19:20:55,099 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 754 transitions. Word has length 19 [2021-08-12 19:20:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:55,099 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 754 transitions. [2021-08-12 19:20:55,099 INFO L483 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) [2021-08-12 19:20:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 754 transitions. [2021-08-12 19:20:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:20:55,099 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:55,099 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:55,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-08-12 19:20:55,313 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:55,313 INFO L82 PathProgramCache]: Analyzing trace with hash 311126640, now seen corresponding path program 3 times [2021-08-12 19:20:55,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:55,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158776415] [2021-08-12 19:20:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:55,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158776415] [2021-08-12 19:20:55,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158776415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720022816] [2021-08-12 19:20:55,354 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 [2021-08-12 19:20:55,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:20:55,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:55,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:20:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720022816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:55,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:55,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:20:55,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558961503] [2021-08-12 19:20:55,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:20:55,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:20:55,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:20:55,435 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) [2021-08-12 19:20:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:56,874 INFO L93 Difference]: Finished difference Result 360 states and 1044 transitions. [2021-08-12 19:20:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:20:56,874 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 [2021-08-12 19:20:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:56,876 INFO L225 Difference]: With dead ends: 360 [2021-08-12 19:20:56,876 INFO L226 Difference]: Without dead ends: 321 [2021-08-12 19:20:56,876 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:20:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-12 19:20:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 250. [2021-08-12 19:20:57,116 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) [2021-08-12 19:20:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 750 transitions. [2021-08-12 19:20:57,118 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 750 transitions. Word has length 19 [2021-08-12 19:20:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:57,118 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 750 transitions. [2021-08-12 19:20:57,118 INFO L483 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) [2021-08-12 19:20:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 750 transitions. [2021-08-12 19:20:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:20:57,118 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:57,118 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:57,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-08-12 19:20:57,333 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1664534853, now seen corresponding path program 3 times [2021-08-12 19:20:57,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:57,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665557164] [2021-08-12 19:20:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:57,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:57,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665557164] [2021-08-12 19:20:57,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665557164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:57,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553267960] [2021-08-12 19:20:57,364 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) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:57,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:20:57,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:57,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:20:57,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:57,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553267960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:57,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:57,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:20:57,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677937354] [2021-08-12 19:20:57,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:20:57,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:57,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:20:57,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:20:57,442 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) [2021-08-12 19:20:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:58,883 INFO L93 Difference]: Finished difference Result 380 states and 1095 transitions. [2021-08-12 19:20:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:20:58,883 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 [2021-08-12 19:20:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:58,885 INFO L225 Difference]: With dead ends: 380 [2021-08-12 19:20:58,885 INFO L226 Difference]: Without dead ends: 351 [2021-08-12 19:20:58,885 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:20:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-12 19:20:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2021-08-12 19:20:59,107 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) [2021-08-12 19:20:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-08-12 19:20:59,108 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 19 [2021-08-12 19:20:59,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:59,109 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-08-12 19:20:59,109 INFO L483 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) [2021-08-12 19:20:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-08-12 19:20:59,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:20:59,109 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:59,109 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:59,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:59,325 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:59,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:59,325 INFO L82 PathProgramCache]: Analyzing trace with hash -757034203, now seen corresponding path program 4 times [2021-08-12 19:20:59,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:59,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141748981] [2021-08-12 19:20:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:59,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:59,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141748981] [2021-08-12 19:20:59,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141748981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:59,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044199106] [2021-08-12 19:20:59,351 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 [2021-08-12 19:20:59,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:59,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:20:59,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:59,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044199106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:59,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:59,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:20:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729855793] [2021-08-12 19:20:59,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:20:59,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:20:59,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:20:59,420 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) [2021-08-12 19:21:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:00,651 INFO L93 Difference]: Finished difference Result 350 states and 1011 transitions. [2021-08-12 19:21:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:00,651 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 [2021-08-12 19:21:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:00,653 INFO L225 Difference]: With dead ends: 350 [2021-08-12 19:21:00,653 INFO L226 Difference]: Without dead ends: 305 [2021-08-12 19:21:00,653 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:21:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-08-12 19:21:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 242. [2021-08-12 19:21:00,878 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) [2021-08-12 19:21:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 722 transitions. [2021-08-12 19:21:00,880 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 722 transitions. Word has length 19 [2021-08-12 19:21:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:00,880 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 722 transitions. [2021-08-12 19:21:00,880 INFO L483 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) [2021-08-12 19:21:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 722 transitions. [2021-08-12 19:21:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:00,880 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:00,880 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:01,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:01,096 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:01,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1495725994, now seen corresponding path program 4 times [2021-08-12 19:21:01,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:01,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805910101] [2021-08-12 19:21:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:01,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805910101] [2021-08-12 19:21:01,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805910101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864165524] [2021-08-12 19:21:01,149 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 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 [2021-08-12 19:21:01,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:01,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:01,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:01,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864165524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:01,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:21:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044816477] [2021-08-12 19:21:01,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:21:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:21:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:21:01,229 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) [2021-08-12 19:21:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:02,800 INFO L93 Difference]: Finished difference Result 409 states and 1191 transitions. [2021-08-12 19:21:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:02,801 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 [2021-08-12 19:21:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:02,803 INFO L225 Difference]: With dead ends: 409 [2021-08-12 19:21:02,803 INFO L226 Difference]: Without dead ends: 379 [2021-08-12 19:21:02,803 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:21:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-12 19:21:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 246. [2021-08-12 19:21:03,035 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) [2021-08-12 19:21:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-08-12 19:21:03,037 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-08-12 19:21:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:03,037 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-08-12 19:21:03,037 INFO L483 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) [2021-08-12 19:21:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-08-12 19:21:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:03,038 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:03,038 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:03,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-08-12 19:21:03,254 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:03,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1556074207, now seen corresponding path program 5 times [2021-08-12 19:21:03,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:03,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531036237] [2021-08-12 19:21:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:03,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531036237] [2021-08-12 19:21:03,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531036237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35381099] [2021-08-12 19:21:03,281 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 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 [2021-08-12 19:21:03,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:03,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:03,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:03,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:03,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35381099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:03,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:03,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:21:03,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611970284] [2021-08-12 19:21:03,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:21:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:21:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:21:03,355 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) [2021-08-12 19:21:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:04,935 INFO L93 Difference]: Finished difference Result 401 states and 1162 transitions. [2021-08-12 19:21:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:04,935 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 [2021-08-12 19:21:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:04,937 INFO L225 Difference]: With dead ends: 401 [2021-08-12 19:21:04,937 INFO L226 Difference]: Without dead ends: 364 [2021-08-12 19:21:04,938 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:21:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-12 19:21:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 262. [2021-08-12 19:21:05,190 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) [2021-08-12 19:21:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-08-12 19:21:05,192 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-08-12 19:21:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:05,192 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-08-12 19:21:05,192 INFO L483 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) [2021-08-12 19:21:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-08-12 19:21:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:05,192 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:05,193 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:05,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-08-12 19:21:05,409 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1524127254, now seen corresponding path program 5 times [2021-08-12 19:21:05,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:05,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270876528] [2021-08-12 19:21:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:05,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:05,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270876528] [2021-08-12 19:21:05,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270876528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:05,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865905053] [2021-08-12 19:21:05,436 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 [2021-08-12 19:21:05,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:05,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:05,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865905053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:05,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:05,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:21:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226149804] [2021-08-12 19:21:05,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:21:05,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:21:05,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:21:05,504 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) [2021-08-12 19:21:07,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:07,271 INFO L93 Difference]: Finished difference Result 438 states and 1273 transitions. [2021-08-12 19:21:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:07,271 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 [2021-08-12 19:21:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:07,273 INFO L225 Difference]: With dead ends: 438 [2021-08-12 19:21:07,273 INFO L226 Difference]: Without dead ends: 408 [2021-08-12 19:21:07,274 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:21:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-08-12 19:21:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 262. [2021-08-12 19:21:07,529 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) [2021-08-12 19:21:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-08-12 19:21:07,531 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-08-12 19:21:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:07,531 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-08-12 19:21:07,531 INFO L483 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) [2021-08-12 19:21:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-08-12 19:21:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:07,532 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:07,532 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:07,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-08-12 19:21:07,748 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash 898871962, now seen corresponding path program 6 times [2021-08-12 19:21:07,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:07,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815257309] [2021-08-12 19:21:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:07,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:07,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815257309] [2021-08-12 19:21:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815257309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:07,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709339994] [2021-08-12 19:21:07,778 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 [2021-08-12 19:21:07,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:21:07,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:07,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:07,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:07,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709339994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:07,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:07,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:21:07,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278843918] [2021-08-12 19:21:07,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:21:07,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:07,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:21:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:21:07,866 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) [2021-08-12 19:21:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:09,278 INFO L93 Difference]: Finished difference Result 384 states and 1120 transitions. [2021-08-12 19:21:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:09,279 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 [2021-08-12 19:21:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:09,281 INFO L225 Difference]: With dead ends: 384 [2021-08-12 19:21:09,281 INFO L226 Difference]: Without dead ends: 345 [2021-08-12 19:21:09,281 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:21:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-12 19:21:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 262. [2021-08-12 19:21:09,545 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) [2021-08-12 19:21:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 790 transitions. [2021-08-12 19:21:09,547 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 790 transitions. Word has length 19 [2021-08-12 19:21:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:09,547 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 790 transitions. [2021-08-12 19:21:09,547 INFO L483 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) [2021-08-12 19:21:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 790 transitions. [2021-08-12 19:21:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:09,547 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:09,548 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:09,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:09,764 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:09,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1076789531, now seen corresponding path program 6 times [2021-08-12 19:21:09,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:09,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599880387] [2021-08-12 19:21:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:09,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:09,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599880387] [2021-08-12 19:21:09,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599880387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:09,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719541783] [2021-08-12 19:21:09,792 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 [2021-08-12 19:21:09,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:21:09,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:09,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719541783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:09,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:09,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:21:09,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314174474] [2021-08-12 19:21:09,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:21:09,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:09,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:21:09,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:21:09,867 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) [2021-08-12 19:21:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:11,125 INFO L93 Difference]: Finished difference Result 355 states and 1038 transitions. [2021-08-12 19:21:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:11,126 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 [2021-08-12 19:21:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:11,128 INFO L225 Difference]: With dead ends: 355 [2021-08-12 19:21:11,128 INFO L226 Difference]: Without dead ends: 326 [2021-08-12 19:21:11,128 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:21:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-08-12 19:21:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2021-08-12 19:21:11,366 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) [2021-08-12 19:21:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-08-12 19:21:11,368 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-08-12 19:21:11,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:11,368 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-08-12 19:21:11,368 INFO L483 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) [2021-08-12 19:21:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-08-12 19:21:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:11,368 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:11,368 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:11,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-08-12 19:21:11,585 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash 132155580, now seen corresponding path program 7 times [2021-08-12 19:21:11,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:11,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210219000] [2021-08-12 19:21:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:11,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210219000] [2021-08-12 19:21:11,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210219000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:11,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634174686] [2021-08-12 19:21:11,610 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 [2021-08-12 19:21:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:11,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:11,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:11,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634174686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:11,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:11,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:21:11,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88096355] [2021-08-12 19:21:11,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:21:11,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:21:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:21:11,685 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) [2021-08-12 19:21:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:13,796 INFO L93 Difference]: Finished difference Result 522 states and 1489 transitions. [2021-08-12 19:21:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:13,796 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 [2021-08-12 19:21:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:13,798 INFO L225 Difference]: With dead ends: 522 [2021-08-12 19:21:13,798 INFO L226 Difference]: Without dead ends: 468 [2021-08-12 19:21:13,799 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:21:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-12 19:21:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-08-12 19:21:14,033 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) [2021-08-12 19:21:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 767 transitions. [2021-08-12 19:21:14,035 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 767 transitions. Word has length 19 [2021-08-12 19:21:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:14,035 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 767 transitions. [2021-08-12 19:21:14,035 INFO L483 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) [2021-08-12 19:21:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 767 transitions. [2021-08-12 19:21:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:14,036 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:14,036 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:14,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:14,249 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:14,250 INFO L82 PathProgramCache]: Analyzing trace with hash 48107957, now seen corresponding path program 7 times [2021-08-12 19:21:14,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:14,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183357777] [2021-08-12 19:21:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:14,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:14,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183357777] [2021-08-12 19:21:14,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183357777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:14,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431014734] [2021-08-12 19:21:14,275 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 [2021-08-12 19:21:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:14,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431014734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:14,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:14,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:21:14,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613584120] [2021-08-12 19:21:14,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:21:14,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:21:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:21:14,345 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) [2021-08-12 19:21:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:16,723 INFO L93 Difference]: Finished difference Result 637 states and 1867 transitions. [2021-08-12 19:21:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:16,724 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 [2021-08-12 19:21:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:16,726 INFO L225 Difference]: With dead ends: 637 [2021-08-12 19:21:16,726 INFO L226 Difference]: Without dead ends: 608 [2021-08-12 19:21:16,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-12 19:21:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 264. [2021-08-12 19:21:16,960 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) [2021-08-12 19:21:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 803 transitions. [2021-08-12 19:21:16,962 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 803 transitions. Word has length 19 [2021-08-12 19:21:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:16,962 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 803 transitions. [2021-08-12 19:21:16,962 INFO L483 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) [2021-08-12 19:21:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 803 transitions. [2021-08-12 19:21:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:16,962 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:16,962 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:17,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:17,179 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:17,179 INFO L82 PathProgramCache]: Analyzing trace with hash -296709027, now seen corresponding path program 8 times [2021-08-12 19:21:17,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:17,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037458097] [2021-08-12 19:21:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:17,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:17,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037458097] [2021-08-12 19:21:17,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037458097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:17,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863574934] [2021-08-12 19:21:17,203 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 [2021-08-12 19:21:17,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:17,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:17,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:17,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:17,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863574934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:17,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:17,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:21:17,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011990058] [2021-08-12 19:21:17,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:21:17,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:17,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:21:17,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:21:17,269 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) [2021-08-12 19:21:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:19,530 INFO L93 Difference]: Finished difference Result 583 states and 1700 transitions. [2021-08-12 19:21:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:19,531 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 [2021-08-12 19:21:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:19,533 INFO L225 Difference]: With dead ends: 583 [2021-08-12 19:21:19,533 INFO L226 Difference]: Without dead ends: 546 [2021-08-12 19:21:19,533 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:21:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-12 19:21:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 280. [2021-08-12 19:21:19,794 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) [2021-08-12 19:21:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-08-12 19:21:19,796 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-08-12 19:21:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:19,796 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-08-12 19:21:19,796 INFO L483 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) [2021-08-12 19:21:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-08-12 19:21:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:19,797 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:19,797 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:20,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:20,007 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:20,007 INFO L82 PathProgramCache]: Analyzing trace with hash -264762074, now seen corresponding path program 8 times [2021-08-12 19:21:20,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:20,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624206961] [2021-08-12 19:21:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:20,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:20,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624206961] [2021-08-12 19:21:20,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624206961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:20,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759393609] [2021-08-12 19:21:20,037 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 [2021-08-12 19:21:20,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:20,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:20,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:20,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:20,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759393609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:20,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:20,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:21:20,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176815546] [2021-08-12 19:21:20,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:21:20,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:21:20,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:20,116 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) [2021-08-12 19:21:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:22,400 INFO L93 Difference]: Finished difference Result 551 states and 1611 transitions. [2021-08-12 19:21:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:22,401 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 [2021-08-12 19:21:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:22,403 INFO L225 Difference]: With dead ends: 551 [2021-08-12 19:21:22,403 INFO L226 Difference]: Without dead ends: 521 [2021-08-12 19:21:22,403 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:21:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-12 19:21:22,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 280. [2021-08-12 19:21:22,665 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) [2021-08-12 19:21:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-08-12 19:21:22,668 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-08-12 19:21:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:22,668 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-08-12 19:21:22,668 INFO L483 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) [2021-08-12 19:21:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-08-12 19:21:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:22,668 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:22,668 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:22,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-08-12 19:21:22,884 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2136730154, now seen corresponding path program 9 times [2021-08-12 19:21:22,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:22,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988271901] [2021-08-12 19:21:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:22,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:22,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988271901] [2021-08-12 19:21:22,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988271901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:22,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536160549] [2021-08-12 19:21:22,915 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 [2021-08-12 19:21:22,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:22,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:22,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:22,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:22,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536160549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:22,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:22,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:21:22,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984252522] [2021-08-12 19:21:22,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:21:22,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:21:22,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:22,998 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) [2021-08-12 19:21:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:25,264 INFO L93 Difference]: Finished difference Result 548 states and 1585 transitions. [2021-08-12 19:21:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:25,265 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 [2021-08-12 19:21:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:25,267 INFO L225 Difference]: With dead ends: 548 [2021-08-12 19:21:25,267 INFO L226 Difference]: Without dead ends: 509 [2021-08-12 19:21:25,267 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:21:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-12 19:21:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 280. [2021-08-12 19:21:25,530 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) [2021-08-12 19:21:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 855 transitions. [2021-08-12 19:21:25,532 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 855 transitions. Word has length 19 [2021-08-12 19:21:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:25,532 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 855 transitions. [2021-08-12 19:21:25,532 INFO L483 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) [2021-08-12 19:21:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 855 transitions. [2021-08-12 19:21:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:25,533 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:25,533 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:25,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:25,749 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:25,749 INFO L82 PathProgramCache]: Analyzing trace with hash 182575649, now seen corresponding path program 9 times [2021-08-12 19:21:25,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:25,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006751956] [2021-08-12 19:21:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:25,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:25,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006751956] [2021-08-12 19:21:25,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006751956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:25,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038969017] [2021-08-12 19:21:25,800 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 [2021-08-12 19:21:25,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:25,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:25,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038969017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:25,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:25,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:21:25,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669185844] [2021-08-12 19:21:25,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:21:25,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:25,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:21:25,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:21:25,865 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) [2021-08-12 19:21:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:28,259 INFO L93 Difference]: Finished difference Result 601 states and 1745 transitions. [2021-08-12 19:21:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:28,260 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 [2021-08-12 19:21:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:28,262 INFO L225 Difference]: With dead ends: 601 [2021-08-12 19:21:28,262 INFO L226 Difference]: Without dead ends: 572 [2021-08-12 19:21:28,263 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:21:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-08-12 19:21:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 269. [2021-08-12 19:21:28,527 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) [2021-08-12 19:21:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 822 transitions. [2021-08-12 19:21:28,529 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 822 transitions. Word has length 19 [2021-08-12 19:21:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:28,529 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 822 transitions. [2021-08-12 19:21:28,529 INFO L483 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) [2021-08-12 19:21:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 822 transitions. [2021-08-12 19:21:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:28,530 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:28,530 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:28,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:28,746 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash -12394796, now seen corresponding path program 10 times [2021-08-12 19:21:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:28,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047901691] [2021-08-12 19:21:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:28,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:28,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047901691] [2021-08-12 19:21:28,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047901691] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:21:28,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:21:28,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:21:28,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097621839] [2021-08-12 19:21:28,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:21:28,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:28,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:21:28,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:21:28,775 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) [2021-08-12 19:21:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:30,490 INFO L93 Difference]: Finished difference Result 443 states and 1272 transitions. [2021-08-12 19:21:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:30,490 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 [2021-08-12 19:21:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:30,493 INFO L225 Difference]: With dead ends: 443 [2021-08-12 19:21:30,493 INFO L226 Difference]: Without dead ends: 389 [2021-08-12 19:21:30,493 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-12 19:21:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 273. [2021-08-12 19:21:30,749 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) [2021-08-12 19:21:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 828 transitions. [2021-08-12 19:21:30,750 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 828 transitions. Word has length 19 [2021-08-12 19:21:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:30,750 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 828 transitions. [2021-08-12 19:21:30,750 INFO L483 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) [2021-08-12 19:21:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 828 transitions. [2021-08-12 19:21:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:30,751 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:30,751 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:30,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2021-08-12 19:21:30,751 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1941255398, now seen corresponding path program 11 times [2021-08-12 19:21:30,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:30,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563825154] [2021-08-12 19:21:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:30,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:30,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563825154] [2021-08-12 19:21:30,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563825154] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:21:30,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:21:30,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:21:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659292485] [2021-08-12 19:21:30,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:21:30,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:21:30,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:21:30,778 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) [2021-08-12 19:21:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:32,463 INFO L93 Difference]: Finished difference Result 427 states and 1229 transitions. [2021-08-12 19:21:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:32,464 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 [2021-08-12 19:21:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:32,466 INFO L225 Difference]: With dead ends: 427 [2021-08-12 19:21:32,466 INFO L226 Difference]: Without dead ends: 391 [2021-08-12 19:21:32,466 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-12 19:21:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 283. [2021-08-12 19:21:32,743 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) [2021-08-12 19:21:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 853 transitions. [2021-08-12 19:21:32,745 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 853 transitions. Word has length 19 [2021-08-12 19:21:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:32,745 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 853 transitions. [2021-08-12 19:21:32,745 INFO L483 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) [2021-08-12 19:21:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 853 transitions. [2021-08-12 19:21:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:32,745 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:32,745 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:32,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2021-08-12 19:21:32,745 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash -449594866, now seen corresponding path program 12 times [2021-08-12 19:21:32,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:32,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535126878] [2021-08-12 19:21:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:32,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:32,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535126878] [2021-08-12 19:21:32,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535126878] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:21:32,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:21:32,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:21:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415458948] [2021-08-12 19:21:32,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:21:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:21:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:21:32,783 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) [2021-08-12 19:21:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:34,211 INFO L93 Difference]: Finished difference Result 391 states and 1137 transitions. [2021-08-12 19:21:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:34,211 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 [2021-08-12 19:21:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:34,214 INFO L225 Difference]: With dead ends: 391 [2021-08-12 19:21:34,214 INFO L226 Difference]: Without dead ends: 346 [2021-08-12 19:21:34,214 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-12 19:21:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2021-08-12 19:21:34,475 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) [2021-08-12 19:21:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 820 transitions. [2021-08-12 19:21:34,477 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 820 transitions. Word has length 19 [2021-08-12 19:21:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:34,477 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 820 transitions. [2021-08-12 19:21:34,477 INFO L483 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) [2021-08-12 19:21:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 820 transitions. [2021-08-12 19:21:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:34,477 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:34,477 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:34,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2021-08-12 19:21:34,478 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash -405487539, now seen corresponding path program 10 times [2021-08-12 19:21:34,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:34,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834158074] [2021-08-12 19:21:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:34,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:34,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834158074] [2021-08-12 19:21:34,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834158074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:34,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577401728] [2021-08-12 19:21:34,504 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 [2021-08-12 19:21:34,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:34,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:34,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:34,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577401728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:34,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:34,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:21:34,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887518213] [2021-08-12 19:21:34,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:21:34,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:34,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:21:34,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:21:34,566 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) [2021-08-12 19:21:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:36,845 INFO L93 Difference]: Finished difference Result 560 states and 1618 transitions. [2021-08-12 19:21:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:36,845 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 [2021-08-12 19:21:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:36,847 INFO L225 Difference]: With dead ends: 560 [2021-08-12 19:21:36,847 INFO L226 Difference]: Without dead ends: 531 [2021-08-12 19:21:36,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-08-12 19:21:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 254. [2021-08-12 19:21:37,084 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) [2021-08-12 19:21:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 762 transitions. [2021-08-12 19:21:37,086 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 762 transitions. Word has length 19 [2021-08-12 19:21:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:37,086 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 762 transitions. [2021-08-12 19:21:37,086 INFO L483 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) [2021-08-12 19:21:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 762 transitions. [2021-08-12 19:21:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:37,087 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:37,087 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:37,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-08-12 19:21:37,301 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1305660447, now seen corresponding path program 11 times [2021-08-12 19:21:37,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:37,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944913683] [2021-08-12 19:21:37,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:37,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:37,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944913683] [2021-08-12 19:21:37,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944913683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:37,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835880520] [2021-08-12 19:21:37,325 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 [2021-08-12 19:21:37,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:37,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835880520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:37,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:37,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:21:37,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398423641] [2021-08-12 19:21:37,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:21:37,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:21:37,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:21:37,400 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) [2021-08-12 19:21:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:39,531 INFO L93 Difference]: Finished difference Result 499 states and 1434 transitions. [2021-08-12 19:21:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:39,532 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 [2021-08-12 19:21:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:39,534 INFO L225 Difference]: With dead ends: 499 [2021-08-12 19:21:39,534 INFO L226 Difference]: Without dead ends: 464 [2021-08-12 19:21:39,534 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:21:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-12 19:21:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 266. [2021-08-12 19:21:39,804 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) [2021-08-12 19:21:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 801 transitions. [2021-08-12 19:21:39,806 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 801 transitions. Word has length 19 [2021-08-12 19:21:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:39,806 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 801 transitions. [2021-08-12 19:21:39,806 INFO L483 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) [2021-08-12 19:21:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 801 transitions. [2021-08-12 19:21:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:39,806 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:39,806 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:40,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:40,018 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1773947229, now seen corresponding path program 12 times [2021-08-12 19:21:40,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:40,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156005883] [2021-08-12 19:21:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:40,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:40,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156005883] [2021-08-12 19:21:40,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156005883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:40,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242751889] [2021-08-12 19:21:40,046 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 [2021-08-12 19:21:40,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:21:40,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:40,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:40,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242751889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:40,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:40,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:21:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994495115] [2021-08-12 19:21:40,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:21:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:21:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:21:40,114 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) [2021-08-12 19:21:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:42,059 INFO L93 Difference]: Finished difference Result 477 states and 1382 transitions. [2021-08-12 19:21:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:42,060 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 [2021-08-12 19:21:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:42,062 INFO L225 Difference]: With dead ends: 477 [2021-08-12 19:21:42,062 INFO L226 Difference]: Without dead ends: 448 [2021-08-12 19:21:42,062 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:21:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-08-12 19:21:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 251. [2021-08-12 19:21:42,297 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) [2021-08-12 19:21:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 756 transitions. [2021-08-12 19:21:42,299 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 756 transitions. Word has length 19 [2021-08-12 19:21:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:42,299 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 756 transitions. [2021-08-12 19:21:42,299 INFO L483 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) [2021-08-12 19:21:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 756 transitions. [2021-08-12 19:21:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:42,300 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:42,300 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:42,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:42,516 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:42,516 INFO L82 PathProgramCache]: Analyzing trace with hash -964970507, now seen corresponding path program 13 times [2021-08-12 19:21:42,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:42,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958361160] [2021-08-12 19:21:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:42,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958361160] [2021-08-12 19:21:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958361160] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:21:42,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:21:42,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:21:42,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191353601] [2021-08-12 19:21:42,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:21:42,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:42,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:21:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:21:42,541 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) [2021-08-12 19:21:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:44,663 INFO L93 Difference]: Finished difference Result 498 states and 1425 transitions. [2021-08-12 19:21:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:44,663 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 [2021-08-12 19:21:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:44,666 INFO L225 Difference]: With dead ends: 498 [2021-08-12 19:21:44,666 INFO L226 Difference]: Without dead ends: 461 [2021-08-12 19:21:44,666 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:21:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-12 19:21:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 271. [2021-08-12 19:21:44,936 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) [2021-08-12 19:21:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 822 transitions. [2021-08-12 19:21:44,939 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 822 transitions. Word has length 19 [2021-08-12 19:21:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:44,939 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 822 transitions. [2021-08-12 19:21:44,939 INFO L483 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) [2021-08-12 19:21:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 822 transitions. [2021-08-12 19:21:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:44,939 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:44,939 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:44,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2021-08-12 19:21:44,939 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash -584232867, now seen corresponding path program 14 times [2021-08-12 19:21:44,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:44,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741190968] [2021-08-12 19:21:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:44,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:44,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741190968] [2021-08-12 19:21:44,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741190968] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:21:44,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:21:44,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:21:44,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998018164] [2021-08-12 19:21:44,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:21:44,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:21:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:21:44,974 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) [2021-08-12 19:21:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:47,120 INFO L93 Difference]: Finished difference Result 504 states and 1428 transitions. [2021-08-12 19:21:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:47,121 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 [2021-08-12 19:21:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:47,123 INFO L225 Difference]: With dead ends: 504 [2021-08-12 19:21:47,123 INFO L226 Difference]: Without dead ends: 467 [2021-08-12 19:21:47,123 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:21:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-12 19:21:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 275. [2021-08-12 19:21:47,399 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) [2021-08-12 19:21:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 831 transitions. [2021-08-12 19:21:47,401 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 831 transitions. Word has length 19 [2021-08-12 19:21:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:47,401 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 831 transitions. [2021-08-12 19:21:47,401 INFO L483 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) [2021-08-12 19:21:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 831 transitions. [2021-08-12 19:21:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:47,402 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:47,402 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:47,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2021-08-12 19:21:47,402 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 967392422, now seen corresponding path program 13 times [2021-08-12 19:21:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:47,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680308790] [2021-08-12 19:21:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:47,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680308790] [2021-08-12 19:21:47,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680308790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361819291] [2021-08-12 19:21:47,433 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 [2021-08-12 19:21:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:47,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:47,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361819291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:47,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:47,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:21:47,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390161818] [2021-08-12 19:21:47,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:21:47,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:47,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:21:47,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:47,519 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) [2021-08-12 19:21:49,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:49,849 INFO L93 Difference]: Finished difference Result 523 states and 1520 transitions. [2021-08-12 19:21:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:49,849 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 [2021-08-12 19:21:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:49,852 INFO L225 Difference]: With dead ends: 523 [2021-08-12 19:21:49,852 INFO L226 Difference]: Without dead ends: 493 [2021-08-12 19:21:49,852 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:21:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-12 19:21:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 281. [2021-08-12 19:21:50,139 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) [2021-08-12 19:21:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 858 transitions. [2021-08-12 19:21:50,141 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 858 transitions. Word has length 19 [2021-08-12 19:21:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:50,141 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 858 transitions. [2021-08-12 19:21:50,141 INFO L483 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) [2021-08-12 19:21:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 858 transitions. [2021-08-12 19:21:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:50,141 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:50,141 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:50,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-08-12 19:21:50,357 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1897553598, now seen corresponding path program 14 times [2021-08-12 19:21:50,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:50,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611457925] [2021-08-12 19:21:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:50,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:50,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611457925] [2021-08-12 19:21:50,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611457925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:50,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763496389] [2021-08-12 19:21:50,386 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 [2021-08-12 19:21:50,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:50,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:50,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:50,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763496389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:50,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:50,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:21:50,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032675777] [2021-08-12 19:21:50,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:21:50,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:50,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:21:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:50,480 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) [2021-08-12 19:21:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:52,723 INFO L93 Difference]: Finished difference Result 505 states and 1451 transitions. [2021-08-12 19:21:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:52,723 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 [2021-08-12 19:21:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:52,726 INFO L225 Difference]: With dead ends: 505 [2021-08-12 19:21:52,726 INFO L226 Difference]: Without dead ends: 469 [2021-08-12 19:21:52,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:21:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-12 19:21:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 281. [2021-08-12 19:21:53,022 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) [2021-08-12 19:21:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-08-12 19:21:53,025 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-08-12 19:21:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:53,025 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-08-12 19:21:53,025 INFO L483 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) [2021-08-12 19:21:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-08-12 19:21:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:53,026 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:53,026 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:53,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:53,242 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:53,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1169104647, now seen corresponding path program 15 times [2021-08-12 19:21:53,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:53,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171142055] [2021-08-12 19:21:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:53,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:53,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171142055] [2021-08-12 19:21:53,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171142055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:53,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191817132] [2021-08-12 19:21:53,268 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 [2021-08-12 19:21:53,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:53,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:53,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:53,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:53,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191817132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:53,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:53,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:21:53,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138499999] [2021-08-12 19:21:53,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:21:53,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:53,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:21:53,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:21:53,345 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) [2021-08-12 19:21:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:55,634 INFO L93 Difference]: Finished difference Result 523 states and 1485 transitions. [2021-08-12 19:21:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:55,635 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 [2021-08-12 19:21:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:55,637 INFO L225 Difference]: With dead ends: 523 [2021-08-12 19:21:55,637 INFO L226 Difference]: Without dead ends: 486 [2021-08-12 19:21:55,637 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:21:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-12 19:21:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 281. [2021-08-12 19:21:55,931 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) [2021-08-12 19:21:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-08-12 19:21:55,933 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-08-12 19:21:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:55,933 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-08-12 19:21:55,933 INFO L483 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) [2021-08-12 19:21:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-08-12 19:21:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:55,934 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:55,934 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:56,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-08-12 19:21:56,137 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1167792078, now seen corresponding path program 15 times [2021-08-12 19:21:56,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:56,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810780677] [2021-08-12 19:21:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:56,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:56,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810780677] [2021-08-12 19:21:56,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810780677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:56,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760022064] [2021-08-12 19:21:56,168 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 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 [2021-08-12 19:21:56,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:21:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:56,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:56,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760022064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:56,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:56,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:21:56,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538314544] [2021-08-12 19:21:56,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:21:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:21:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:56,251 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) [2021-08-12 19:21:58,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:58,561 INFO L93 Difference]: Finished difference Result 514 states and 1479 transitions. [2021-08-12 19:21:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:21:58,561 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 [2021-08-12 19:21:58,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:58,563 INFO L225 Difference]: With dead ends: 514 [2021-08-12 19:21:58,563 INFO L226 Difference]: Without dead ends: 484 [2021-08-12 19:21:58,563 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:21:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-08-12 19:21:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 272. [2021-08-12 19:21:58,833 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) [2021-08-12 19:21:58,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-08-12 19:21:58,835 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-08-12 19:21:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:58,835 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-08-12 19:21:58,835 INFO L483 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) [2021-08-12 19:21:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-08-12 19:21:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:21:58,836 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:58,836 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:59,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-08-12 19:21:59,052 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1086551406, now seen corresponding path program 16 times [2021-08-12 19:21:59,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:59,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676558749] [2021-08-12 19:21:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:59,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:59,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676558749] [2021-08-12 19:21:59,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676558749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:59,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626092453] [2021-08-12 19:21:59,099 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 [2021-08-12 19:21:59,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:59,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:59,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:21:59,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:59,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626092453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:59,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:59,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:21:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665906604] [2021-08-12 19:21:59,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:21:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:21:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:21:59,183 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) [2021-08-12 19:22:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:01,207 INFO L93 Difference]: Finished difference Result 469 states and 1354 transitions. [2021-08-12 19:22:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:01,207 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 [2021-08-12 19:22:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:01,210 INFO L225 Difference]: With dead ends: 469 [2021-08-12 19:22:01,210 INFO L226 Difference]: Without dead ends: 430 [2021-08-12 19:22:01,210 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:22:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-12 19:22:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 272. [2021-08-12 19:22:01,492 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) [2021-08-12 19:22:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-08-12 19:22:01,494 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-08-12 19:22:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:01,494 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-08-12 19:22:01,494 INFO L483 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) [2021-08-12 19:22:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-08-12 19:22:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:01,495 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:01,495 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:01,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-08-12 19:22:01,709 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:01,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:01,709 INFO L82 PathProgramCache]: Analyzing trace with hash -889110087, now seen corresponding path program 16 times [2021-08-12 19:22:01,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:01,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942683955] [2021-08-12 19:22:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:01,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:01,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942683955] [2021-08-12 19:22:01,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942683955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:01,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435029804] [2021-08-12 19:22:01,737 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 [2021-08-12 19:22:01,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:01,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:01,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:01,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435029804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:01,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:01,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:22:01,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918554120] [2021-08-12 19:22:01,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:22:01,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:01,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:22:01,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:22:01,813 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) [2021-08-12 19:22:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:03,874 INFO L93 Difference]: Finished difference Result 495 states and 1430 transitions. [2021-08-12 19:22:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:03,875 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 [2021-08-12 19:22:03,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:03,877 INFO L225 Difference]: With dead ends: 495 [2021-08-12 19:22:03,877 INFO L226 Difference]: Without dead ends: 466 [2021-08-12 19:22:03,877 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:22:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-08-12 19:22:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 268. [2021-08-12 19:22:04,151 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) [2021-08-12 19:22:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 814 transitions. [2021-08-12 19:22:04,153 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 814 transitions. Word has length 19 [2021-08-12 19:22:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:04,153 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 814 transitions. [2021-08-12 19:22:04,153 INFO L483 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) [2021-08-12 19:22:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 814 transitions. [2021-08-12 19:22:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:04,153 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:04,154 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:04,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:04,369 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1710395246, now seen corresponding path program 17 times [2021-08-12 19:22:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:04,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611044562] [2021-08-12 19:22:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:04,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:04,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611044562] [2021-08-12 19:22:04,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611044562] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:04,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:04,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:04,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476072818] [2021-08-12 19:22:04,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:04,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:04,396 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) [2021-08-12 19:22:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:06,267 INFO L93 Difference]: Finished difference Result 440 states and 1268 transitions. [2021-08-12 19:22:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:06,268 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 [2021-08-12 19:22:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:06,271 INFO L225 Difference]: With dead ends: 440 [2021-08-12 19:22:06,271 INFO L226 Difference]: Without dead ends: 404 [2021-08-12 19:22:06,271 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-12 19:22:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 278. [2021-08-12 19:22:06,559 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) [2021-08-12 19:22:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 839 transitions. [2021-08-12 19:22:06,561 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 839 transitions. Word has length 19 [2021-08-12 19:22:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:06,561 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 839 transitions. [2021-08-12 19:22:06,561 INFO L483 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) [2021-08-12 19:22:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 839 transitions. [2021-08-12 19:22:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:06,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:06,562 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:06,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2021-08-12 19:22:06,562 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:06,562 INFO L82 PathProgramCache]: Analyzing trace with hash 608481094, now seen corresponding path program 18 times [2021-08-12 19:22:06,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:06,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327445444] [2021-08-12 19:22:06,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:06,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:06,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327445444] [2021-08-12 19:22:06,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327445444] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:06,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:06,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:06,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993297281] [2021-08-12 19:22:06,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:06,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:06,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:06,589 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) [2021-08-12 19:22:08,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:08,495 INFO L93 Difference]: Finished difference Result 404 states and 1176 transitions. [2021-08-12 19:22:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:08,495 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 [2021-08-12 19:22:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:08,497 INFO L225 Difference]: With dead ends: 404 [2021-08-12 19:22:08,497 INFO L226 Difference]: Without dead ends: 363 [2021-08-12 19:22:08,497 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-12 19:22:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 268. [2021-08-12 19:22:08,775 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) [2021-08-12 19:22:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 813 transitions. [2021-08-12 19:22:08,777 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 813 transitions. Word has length 19 [2021-08-12 19:22:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:08,777 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 813 transitions. [2021-08-12 19:22:08,777 INFO L483 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) [2021-08-12 19:22:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 813 transitions. [2021-08-12 19:22:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:08,777 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:08,777 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:08,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2021-08-12 19:22:08,778 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1860559839, now seen corresponding path program 17 times [2021-08-12 19:22:08,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:08,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575775086] [2021-08-12 19:22:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:08,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:08,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575775086] [2021-08-12 19:22:08,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575775086] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:08,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:08,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:08,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701787967] [2021-08-12 19:22:08,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:08,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:08,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:08,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:08,804 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) [2021-08-12 19:22:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:10,725 INFO L93 Difference]: Finished difference Result 464 states and 1325 transitions. [2021-08-12 19:22:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:10,725 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 [2021-08-12 19:22:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:10,728 INFO L225 Difference]: With dead ends: 464 [2021-08-12 19:22:10,728 INFO L226 Difference]: Without dead ends: 429 [2021-08-12 19:22:10,728 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:22:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-12 19:22:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 274. [2021-08-12 19:22:11,016 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) [2021-08-12 19:22:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 827 transitions. [2021-08-12 19:22:11,018 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 827 transitions. Word has length 19 [2021-08-12 19:22:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:11,018 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 827 transitions. [2021-08-12 19:22:11,018 INFO L483 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) [2021-08-12 19:22:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 827 transitions. [2021-08-12 19:22:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:11,018 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:11,018 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:11,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2021-08-12 19:22:11,018 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1590050147, now seen corresponding path program 18 times [2021-08-12 19:22:11,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:11,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128904151] [2021-08-12 19:22:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:11,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128904151] [2021-08-12 19:22:11,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128904151] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:11,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:11,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:11,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432762451] [2021-08-12 19:22:11,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:11,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:11,050 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) [2021-08-12 19:22:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:12,809 INFO L93 Difference]: Finished difference Result 442 states and 1283 transitions. [2021-08-12 19:22:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:12,810 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 [2021-08-12 19:22:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:12,812 INFO L225 Difference]: With dead ends: 442 [2021-08-12 19:22:12,812 INFO L226 Difference]: Without dead ends: 413 [2021-08-12 19:22:12,812 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:22:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-12 19:22:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 253. [2021-08-12 19:22:13,056 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) [2021-08-12 19:22:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-08-12 19:22:13,058 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 19 [2021-08-12 19:22:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:13,058 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-08-12 19:22:13,058 INFO L483 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) [2021-08-12 19:22:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-08-12 19:22:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:13,059 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:13,059 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:13,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2021-08-12 19:22:13,059 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash 53973003, now seen corresponding path program 19 times [2021-08-12 19:22:13,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:13,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406245411] [2021-08-12 19:22:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:13,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406245411] [2021-08-12 19:22:13,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406245411] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:13,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:13,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:13,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106204025] [2021-08-12 19:22:13,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:13,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:13,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:13,083 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) [2021-08-12 19:22:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:14,752 INFO L93 Difference]: Finished difference Result 427 states and 1221 transitions. [2021-08-12 19:22:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:14,753 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 [2021-08-12 19:22:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:14,755 INFO L225 Difference]: With dead ends: 427 [2021-08-12 19:22:14,755 INFO L226 Difference]: Without dead ends: 382 [2021-08-12 19:22:14,755 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-12 19:22:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 259. [2021-08-12 19:22:15,008 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) [2021-08-12 19:22:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 780 transitions. [2021-08-12 19:22:15,010 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 780 transitions. Word has length 19 [2021-08-12 19:22:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:15,010 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 780 transitions. [2021-08-12 19:22:15,010 INFO L483 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) [2021-08-12 19:22:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 780 transitions. [2021-08-12 19:22:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:15,011 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:15,011 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:15,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2021-08-12 19:22:15,011 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:15,011 INFO L82 PathProgramCache]: Analyzing trace with hash -481846493, now seen corresponding path program 20 times [2021-08-12 19:22:15,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:15,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071912279] [2021-08-12 19:22:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:15,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:15,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071912279] [2021-08-12 19:22:15,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071912279] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:15,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:15,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:15,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865523690] [2021-08-12 19:22:15,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:15,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:15,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:15,037 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) [2021-08-12 19:22:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:16,975 INFO L93 Difference]: Finished difference Result 456 states and 1283 transitions. [2021-08-12 19:22:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:16,976 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 [2021-08-12 19:22:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:16,978 INFO L225 Difference]: With dead ends: 456 [2021-08-12 19:22:16,978 INFO L226 Difference]: Without dead ends: 419 [2021-08-12 19:22:16,978 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-12 19:22:17,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 275. [2021-08-12 19:22:17,256 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) [2021-08-12 19:22:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 824 transitions. [2021-08-12 19:22:17,258 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 824 transitions. Word has length 19 [2021-08-12 19:22:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:17,258 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 824 transitions. [2021-08-12 19:22:17,258 INFO L483 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) [2021-08-12 19:22:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 824 transitions. [2021-08-12 19:22:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:17,258 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:17,259 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:17,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2021-08-12 19:22:17,259 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:17,259 INFO L82 PathProgramCache]: Analyzing trace with hash -101108853, now seen corresponding path program 21 times [2021-08-12 19:22:17,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:17,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241164719] [2021-08-12 19:22:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:17,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:17,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241164719] [2021-08-12 19:22:17,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241164719] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:17,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:17,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:17,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846704567] [2021-08-12 19:22:17,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:17,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:17,289 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) [2021-08-12 19:22:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:18,942 INFO L93 Difference]: Finished difference Result 419 states and 1185 transitions. [2021-08-12 19:22:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:18,942 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 [2021-08-12 19:22:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:18,945 INFO L225 Difference]: With dead ends: 419 [2021-08-12 19:22:18,945 INFO L226 Difference]: Without dead ends: 380 [2021-08-12 19:22:18,945 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-08-12 19:22:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 265. [2021-08-12 19:22:19,214 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) [2021-08-12 19:22:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 796 transitions. [2021-08-12 19:22:19,216 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 796 transitions. Word has length 19 [2021-08-12 19:22:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:19,216 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 796 transitions. [2021-08-12 19:22:19,216 INFO L483 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) [2021-08-12 19:22:19,216 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 796 transitions. [2021-08-12 19:22:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:19,217 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:19,217 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:19,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2021-08-12 19:22:19,217 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1901365676, now seen corresponding path program 19 times [2021-08-12 19:22:19,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:19,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497661830] [2021-08-12 19:22:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:19,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:19,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497661830] [2021-08-12 19:22:19,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497661830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:19,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754424203] [2021-08-12 19:22:19,242 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 [2021-08-12 19:22:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:19,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:19,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754424203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:19,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:19,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:22:19,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239873367] [2021-08-12 19:22:19,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:22:19,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:22:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:22:19,304 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) [2021-08-12 19:22:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:21,643 INFO L93 Difference]: Finished difference Result 567 states and 1653 transitions. [2021-08-12 19:22:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:21,644 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 [2021-08-12 19:22:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:21,646 INFO L225 Difference]: With dead ends: 567 [2021-08-12 19:22:21,646 INFO L226 Difference]: Without dead ends: 537 [2021-08-12 19:22:21,647 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-12 19:22:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 271. [2021-08-12 19:22:21,924 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) [2021-08-12 19:22:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 817 transitions. [2021-08-12 19:22:21,926 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 817 transitions. Word has length 19 [2021-08-12 19:22:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:21,926 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 817 transitions. [2021-08-12 19:22:21,926 INFO L483 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) [2021-08-12 19:22:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 817 transitions. [2021-08-12 19:22:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:21,927 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:21,927 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:22,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-08-12 19:22:22,149 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2057197508, now seen corresponding path program 20 times [2021-08-12 19:22:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:22,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703046912] [2021-08-12 19:22:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:22,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:22,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703046912] [2021-08-12 19:22:22,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703046912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:22,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510850384] [2021-08-12 19:22:22,180 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 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 [2021-08-12 19:22:22,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:22,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:22,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:22,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510850384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:22,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:22,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:22:22,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573399878] [2021-08-12 19:22:22,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:22:22,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:22,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:22:22,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:22:22,260 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) [2021-08-12 19:22:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:24,837 INFO L93 Difference]: Finished difference Result 582 states and 1677 transitions. [2021-08-12 19:22:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:24,838 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 [2021-08-12 19:22:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:24,840 INFO L225 Difference]: With dead ends: 582 [2021-08-12 19:22:24,840 INFO L226 Difference]: Without dead ends: 552 [2021-08-12 19:22:24,840 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:22:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-12 19:22:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 277. [2021-08-12 19:22:25,132 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) [2021-08-12 19:22:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 844 transitions. [2021-08-12 19:22:25,134 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 844 transitions. Word has length 19 [2021-08-12 19:22:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:25,134 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 844 transitions. [2021-08-12 19:22:25,134 INFO L483 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) [2021-08-12 19:22:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 844 transitions. [2021-08-12 19:22:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:25,135 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:25,135 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:25,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:25,351 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1127036332, now seen corresponding path program 21 times [2021-08-12 19:22:25,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:25,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128098441] [2021-08-12 19:22:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:25,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128098441] [2021-08-12 19:22:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128098441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897890809] [2021-08-12 19:22:25,376 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 [2021-08-12 19:22:25,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:22:25,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:25,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897890809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:25,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:25,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:22:25,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249962612] [2021-08-12 19:22:25,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:22:25,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:25,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:22:25,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:22:25,444 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) [2021-08-12 19:22:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:27,645 INFO L93 Difference]: Finished difference Result 528 states and 1524 transitions. [2021-08-12 19:22:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:27,646 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 [2021-08-12 19:22:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:27,648 INFO L225 Difference]: With dead ends: 528 [2021-08-12 19:22:27,648 INFO L226 Difference]: Without dead ends: 492 [2021-08-12 19:22:27,648 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:22:27,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-08-12 19:22:27,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 274. [2021-08-12 19:22:27,924 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) [2021-08-12 19:22:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 834 transitions. [2021-08-12 19:22:27,926 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 834 transitions. Word has length 19 [2021-08-12 19:22:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:27,926 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 834 transitions. [2021-08-12 19:22:27,926 INFO L483 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) [2021-08-12 19:22:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 834 transitions. [2021-08-12 19:22:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:27,927 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:27,927 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:28,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:28,143 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:28,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1979218041, now seen corresponding path program 22 times [2021-08-12 19:22:28,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:28,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929580875] [2021-08-12 19:22:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:28,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:28,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929580875] [2021-08-12 19:22:28,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929580875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:28,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915589920] [2021-08-12 19:22:28,169 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 [2021-08-12 19:22:28,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:28,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:28,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:28,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915589920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:28,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:28,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:22:28,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693142408] [2021-08-12 19:22:28,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:22:28,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:28,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:22:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:22:28,243 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) [2021-08-12 19:22:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:30,433 INFO L93 Difference]: Finished difference Result 505 states and 1450 transitions. [2021-08-12 19:22:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:30,433 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 [2021-08-12 19:22:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:30,436 INFO L225 Difference]: With dead ends: 505 [2021-08-12 19:22:30,436 INFO L226 Difference]: Without dead ends: 460 [2021-08-12 19:22:30,436 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:22:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-08-12 19:22:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 271. [2021-08-12 19:22:30,711 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) [2021-08-12 19:22:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-08-12 19:22:30,713 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-08-12 19:22:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:30,713 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-08-12 19:22:30,713 INFO L483 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) [2021-08-12 19:22:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-08-12 19:22:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:30,713 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:30,713 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:30,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:30,930 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:30,930 INFO L82 PathProgramCache]: Analyzing trace with hash 16056364, now seen corresponding path program 22 times [2021-08-12 19:22:30,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:30,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376440828] [2021-08-12 19:22:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:30,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:30,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376440828] [2021-08-12 19:22:30,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376440828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:30,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488488681] [2021-08-12 19:22:30,957 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 [2021-08-12 19:22:30,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:30,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:30,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:31,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488488681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:31,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:31,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:22:31,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706800613] [2021-08-12 19:22:31,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:22:31,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:31,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:22:31,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:22:31,018 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) [2021-08-12 19:22:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:33,389 INFO L93 Difference]: Finished difference Result 569 states and 1671 transitions. [2021-08-12 19:22:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:33,390 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 [2021-08-12 19:22:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:33,393 INFO L225 Difference]: With dead ends: 569 [2021-08-12 19:22:33,393 INFO L226 Difference]: Without dead ends: 539 [2021-08-12 19:22:33,393 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-12 19:22:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 259. [2021-08-12 19:22:33,648 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) [2021-08-12 19:22:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 782 transitions. [2021-08-12 19:22:33,650 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 782 transitions. Word has length 19 [2021-08-12 19:22:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:33,650 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 782 transitions. [2021-08-12 19:22:33,650 INFO L483 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) [2021-08-12 19:22:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 782 transitions. [2021-08-12 19:22:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:33,651 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:33,651 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:33,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:33,865 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:33,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:33,865 INFO L82 PathProgramCache]: Analyzing trace with hash -366317049, now seen corresponding path program 23 times [2021-08-12 19:22:33,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:33,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938284927] [2021-08-12 19:22:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:33,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:33,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938284927] [2021-08-12 19:22:33,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938284927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:33,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050101882] [2021-08-12 19:22:33,893 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 [2021-08-12 19:22:33,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:33,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:33,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:33,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050101882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:33,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:33,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:22:33,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775779620] [2021-08-12 19:22:33,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:22:33,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:22:33,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:33,974 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) [2021-08-12 19:22:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:36,302 INFO L93 Difference]: Finished difference Result 511 states and 1495 transitions. [2021-08-12 19:22:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:36,302 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 [2021-08-12 19:22:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:36,305 INFO L225 Difference]: With dead ends: 511 [2021-08-12 19:22:36,305 INFO L226 Difference]: Without dead ends: 474 [2021-08-12 19:22:36,305 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:22:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-12 19:22:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 275. [2021-08-12 19:22:36,588 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) [2021-08-12 19:22:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-08-12 19:22:36,590 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-08-12 19:22:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:36,590 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-08-12 19:22:36,590 INFO L483 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) [2021-08-12 19:22:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-08-12 19:22:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:36,591 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:36,591 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:36,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-08-12 19:22:36,805 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash -334370096, now seen corresponding path program 23 times [2021-08-12 19:22:36,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:36,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200313484] [2021-08-12 19:22:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:36,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:36,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200313484] [2021-08-12 19:22:36,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200313484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:36,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266894663] [2021-08-12 19:22:36,841 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 [2021-08-12 19:22:36,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:36,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:36,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:36,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266894663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:36,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:36,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:22:36,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020927427] [2021-08-12 19:22:36,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:22:36,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:36,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:22:36,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:22:36,929 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) [2021-08-12 19:22:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:39,426 INFO L93 Difference]: Finished difference Result 562 states and 1647 transitions. [2021-08-12 19:22:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:39,427 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 [2021-08-12 19:22:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:39,429 INFO L225 Difference]: With dead ends: 562 [2021-08-12 19:22:39,429 INFO L226 Difference]: Without dead ends: 532 [2021-08-12 19:22:39,429 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:22:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-12 19:22:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 275. [2021-08-12 19:22:39,747 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) [2021-08-12 19:22:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-08-12 19:22:39,750 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-08-12 19:22:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:39,750 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-08-12 19:22:39,750 INFO L483 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) [2021-08-12 19:22:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-08-12 19:22:39,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:39,751 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:39,751 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:39,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:39,973 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:39,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2088629120, now seen corresponding path program 24 times [2021-08-12 19:22:39,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:39,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178426711] [2021-08-12 19:22:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:39,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178426711] [2021-08-12 19:22:39,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178426711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831432187] [2021-08-12 19:22:39,997 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 [2021-08-12 19:22:40,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:22:40,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:40,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:40,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:40,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831432187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:40,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:40,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:22:40,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022117332] [2021-08-12 19:22:40,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:22:40,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:40,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:22:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:22:40,060 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) [2021-08-12 19:22:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:42,162 INFO L93 Difference]: Finished difference Result 508 states and 1494 transitions. [2021-08-12 19:22:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:42,162 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 [2021-08-12 19:22:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:42,164 INFO L225 Difference]: With dead ends: 508 [2021-08-12 19:22:42,165 INFO L226 Difference]: Without dead ends: 469 [2021-08-12 19:22:42,165 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:22:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-12 19:22:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 275. [2021-08-12 19:22:42,452 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) [2021-08-12 19:22:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 834 transitions. [2021-08-12 19:22:42,454 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 834 transitions. Word has length 19 [2021-08-12 19:22:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:42,454 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 834 transitions. [2021-08-12 19:22:42,454 INFO L483 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) [2021-08-12 19:22:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 834 transitions. [2021-08-12 19:22:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:42,455 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:42,455 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:42,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:42,669 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash 112967627, now seen corresponding path program 24 times [2021-08-12 19:22:42,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:42,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909074757] [2021-08-12 19:22:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:42,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:42,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909074757] [2021-08-12 19:22:42,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909074757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:42,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449283747] [2021-08-12 19:22:42,701 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 [2021-08-12 19:22:42,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:22:42,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:42,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:42,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:42,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449283747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:42,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:42,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:22:42,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396607851] [2021-08-12 19:22:42,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:22:42,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:42,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:22:42,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:42,795 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) [2021-08-12 19:22:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:44,863 INFO L93 Difference]: Finished difference Result 474 states and 1393 transitions. [2021-08-12 19:22:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:44,864 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 [2021-08-12 19:22:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:44,866 INFO L225 Difference]: With dead ends: 474 [2021-08-12 19:22:44,866 INFO L226 Difference]: Without dead ends: 445 [2021-08-12 19:22:44,866 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:22:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-08-12 19:22:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 255. [2021-08-12 19:22:45,125 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) [2021-08-12 19:22:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-08-12 19:22:45,127 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-08-12 19:22:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:45,127 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-08-12 19:22:45,128 INFO L483 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) [2021-08-12 19:22:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-08-12 19:22:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:45,128 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:45,128 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:45,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-08-12 19:22:45,341 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 510647071, now seen corresponding path program 25 times [2021-08-12 19:22:45,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:45,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145577929] [2021-08-12 19:22:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:45,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:45,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145577929] [2021-08-12 19:22:45,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145577929] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:45,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:45,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425168629] [2021-08-12 19:22:45,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:45,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:45,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:45,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:45,369 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) [2021-08-12 19:22:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:47,601 INFO L93 Difference]: Finished difference Result 483 states and 1392 transitions. [2021-08-12 19:22:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:47,601 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 [2021-08-12 19:22:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:47,604 INFO L225 Difference]: With dead ends: 483 [2021-08-12 19:22:47,604 INFO L226 Difference]: Without dead ends: 446 [2021-08-12 19:22:47,604 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-12 19:22:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 275. [2021-08-12 19:22:47,896 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) [2021-08-12 19:22:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-08-12 19:22:47,898 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-08-12 19:22:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:47,899 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-08-12 19:22:47,899 INFO L483 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) [2021-08-12 19:22:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-08-12 19:22:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:47,899 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:47,899 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:47,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2021-08-12 19:22:47,899 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash 891384711, now seen corresponding path program 26 times [2021-08-12 19:22:47,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:47,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476145779] [2021-08-12 19:22:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:47,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:47,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476145779] [2021-08-12 19:22:47,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476145779] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:22:47,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:22:47,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:22:47,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955792379] [2021-08-12 19:22:47,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:22:47,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:47,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:22:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:22:47,927 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) [2021-08-12 19:22:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:50,140 INFO L93 Difference]: Finished difference Result 489 states and 1395 transitions. [2021-08-12 19:22:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:50,140 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 [2021-08-12 19:22:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:50,143 INFO L225 Difference]: With dead ends: 489 [2021-08-12 19:22:50,143 INFO L226 Difference]: Without dead ends: 452 [2021-08-12 19:22:50,143 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-12 19:22:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 279. [2021-08-12 19:22:50,439 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) [2021-08-12 19:22:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 845 transitions. [2021-08-12 19:22:50,441 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 845 transitions. Word has length 19 [2021-08-12 19:22:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:50,441 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 845 transitions. [2021-08-12 19:22:50,441 INFO L483 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) [2021-08-12 19:22:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 845 transitions. [2021-08-12 19:22:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:50,442 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:50,442 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:50,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2021-08-12 19:22:50,442 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1851957296, now seen corresponding path program 25 times [2021-08-12 19:22:50,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:50,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102712017] [2021-08-12 19:22:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:50,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:50,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102712017] [2021-08-12 19:22:50,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102712017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:50,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887788303] [2021-08-12 19:22:50,472 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 [2021-08-12 19:22:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:50,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:50,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887788303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:50,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:50,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:22:50,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037911238] [2021-08-12 19:22:50,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:22:50,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:22:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:22:50,553 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) [2021-08-12 19:22:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:53,049 INFO L93 Difference]: Finished difference Result 549 states and 1600 transitions. [2021-08-12 19:22:53,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:53,050 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 [2021-08-12 19:22:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:53,052 INFO L225 Difference]: With dead ends: 549 [2021-08-12 19:22:53,053 INFO L226 Difference]: Without dead ends: 519 [2021-08-12 19:22:53,053 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:22:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-12 19:22:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 285. [2021-08-12 19:22:53,360 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) [2021-08-12 19:22:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 872 transitions. [2021-08-12 19:22:53,363 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 872 transitions. Word has length 19 [2021-08-12 19:22:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:53,363 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 872 transitions. [2021-08-12 19:22:53,363 INFO L483 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) [2021-08-12 19:22:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 872 transitions. [2021-08-12 19:22:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:53,363 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:53,363 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:53,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:53,579 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -921796120, now seen corresponding path program 26 times [2021-08-12 19:22:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:53,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449939287] [2021-08-12 19:22:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:53,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:53,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449939287] [2021-08-12 19:22:53,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449939287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:53,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456920480] [2021-08-12 19:22:53,605 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 [2021-08-12 19:22:53,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:53,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:53,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:53,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:53,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456920480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:53,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:53,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:22:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002983420] [2021-08-12 19:22:53,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:22:53,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:53,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:22:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:22:53,681 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) [2021-08-12 19:22:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:56,067 INFO L93 Difference]: Finished difference Result 531 states and 1531 transitions. [2021-08-12 19:22:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:56,068 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 [2021-08-12 19:22:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:56,070 INFO L225 Difference]: With dead ends: 531 [2021-08-12 19:22:56,070 INFO L226 Difference]: Without dead ends: 495 [2021-08-12 19:22:56,070 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:22:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-12 19:22:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 284. [2021-08-12 19:22:56,377 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) [2021-08-12 19:22:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 867 transitions. [2021-08-12 19:22:56,380 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 867 transitions. Word has length 19 [2021-08-12 19:22:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:56,380 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 867 transitions. [2021-08-12 19:22:56,380 INFO L483 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) [2021-08-12 19:22:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 867 transitions. [2021-08-12 19:22:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:56,380 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:56,380 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:56,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-08-12 19:22:56,596 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash 306512931, now seen corresponding path program 27 times [2021-08-12 19:22:56,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:56,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292818294] [2021-08-12 19:22:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:56,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:56,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292818294] [2021-08-12 19:22:56,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292818294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:56,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349765087] [2021-08-12 19:22:56,625 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 [2021-08-12 19:22:56,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:22:56,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:56,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:56,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349765087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:56,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:56,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:22:56,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440012779] [2021-08-12 19:22:56,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:22:56,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:56,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:22:56,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:56,712 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) [2021-08-12 19:22:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:59,015 INFO L93 Difference]: Finished difference Result 507 states and 1448 transitions. [2021-08-12 19:22:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:22:59,015 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 [2021-08-12 19:22:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:59,017 INFO L225 Difference]: With dead ends: 507 [2021-08-12 19:22:59,017 INFO L226 Difference]: Without dead ends: 470 [2021-08-12 19:22:59,018 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:22:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-08-12 19:22:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 284. [2021-08-12 19:22:59,318 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) [2021-08-12 19:22:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 870 transitions. [2021-08-12 19:22:59,320 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 870 transitions. Word has length 19 [2021-08-12 19:22:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:59,321 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 870 transitions. [2021-08-12 19:22:59,321 INFO L483 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) [2021-08-12 19:22:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 870 transitions. [2021-08-12 19:22:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:22:59,321 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:59,321 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:59,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:59,537 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:59,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1651557640, now seen corresponding path program 27 times [2021-08-12 19:22:59,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:59,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147344313] [2021-08-12 19:22:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:59,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:59,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147344313] [2021-08-12 19:22:59,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147344313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:59,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029724851] [2021-08-12 19:22:59,566 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 [2021-08-12 19:22:59,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:22:59,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:59,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:22:59,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:59,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029724851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:59,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:59,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:22:59,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133813778] [2021-08-12 19:22:59,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:22:59,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:59,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:22:59,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:22:59,654 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) [2021-08-12 19:23:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:02,049 INFO L93 Difference]: Finished difference Result 528 states and 1518 transitions. [2021-08-12 19:23:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:02,050 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 [2021-08-12 19:23:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:02,052 INFO L225 Difference]: With dead ends: 528 [2021-08-12 19:23:02,052 INFO L226 Difference]: Without dead ends: 498 [2021-08-12 19:23:02,053 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-12 19:23:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 275. [2021-08-12 19:23:02,343 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) [2021-08-12 19:23:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 840 transitions. [2021-08-12 19:23:02,345 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 840 transitions. Word has length 19 [2021-08-12 19:23:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:02,345 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 840 transitions. [2021-08-12 19:23:02,345 INFO L483 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) [2021-08-12 19:23:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 840 transitions. [2021-08-12 19:23:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:02,345 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:02,345 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:02,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-08-12 19:23:02,562 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:02,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:02,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1732798312, now seen corresponding path program 28 times [2021-08-12 19:23:02,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:02,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235770472] [2021-08-12 19:23:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:02,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235770472] [2021-08-12 19:23:02,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235770472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374499145] [2021-08-12 19:23:02,588 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 [2021-08-12 19:23:02,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:02,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:02,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:02,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374499145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:02,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:02,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:23:02,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936949305] [2021-08-12 19:23:02,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:23:02,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:23:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:02,662 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) [2021-08-12 19:23:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:04,752 INFO L93 Difference]: Finished difference Result 483 states and 1393 transitions. [2021-08-12 19:23:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:04,752 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 [2021-08-12 19:23:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:04,755 INFO L225 Difference]: With dead ends: 483 [2021-08-12 19:23:04,755 INFO L226 Difference]: Without dead ends: 444 [2021-08-12 19:23:04,755 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-12 19:23:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 275. [2021-08-12 19:23:05,037 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) [2021-08-12 19:23:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-08-12 19:23:05,039 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-08-12 19:23:05,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:05,040 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-08-12 19:23:05,040 INFO L483 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) [2021-08-12 19:23:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-08-12 19:23:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:05,040 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:05,040 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:05,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:05,256 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash 586507491, now seen corresponding path program 28 times [2021-08-12 19:23:05,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:05,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949593640] [2021-08-12 19:23:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:05,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:05,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949593640] [2021-08-12 19:23:05,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949593640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:05,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636912335] [2021-08-12 19:23:05,288 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 [2021-08-12 19:23:05,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:05,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:05,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:05,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:05,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636912335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:05,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:05,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:23:05,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721656037] [2021-08-12 19:23:05,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:23:05,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:05,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:23:05,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:23:05,376 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) [2021-08-12 19:23:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:07,527 INFO L93 Difference]: Finished difference Result 479 states and 1393 transitions. [2021-08-12 19:23:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:07,527 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 [2021-08-12 19:23:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:07,529 INFO L225 Difference]: With dead ends: 479 [2021-08-12 19:23:07,529 INFO L226 Difference]: Without dead ends: 450 [2021-08-12 19:23:07,530 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:23:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-12 19:23:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 271. [2021-08-12 19:23:07,811 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) [2021-08-12 19:23:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-08-12 19:23:07,813 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-08-12 19:23:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:07,813 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-08-12 19:23:07,813 INFO L483 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) [2021-08-12 19:23:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-08-12 19:23:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:07,814 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:07,814 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:08,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-08-12 19:23:08,029 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:08,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1108954472, now seen corresponding path program 29 times [2021-08-12 19:23:08,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:08,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389489818] [2021-08-12 19:23:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:08,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:08,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389489818] [2021-08-12 19:23:08,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389489818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:08,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:08,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:08,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486496354] [2021-08-12 19:23:08,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:08,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:08,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:08,054 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) [2021-08-12 19:23:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:09,974 INFO L93 Difference]: Finished difference Result 454 states and 1307 transitions. [2021-08-12 19:23:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:09,974 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 [2021-08-12 19:23:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:09,976 INFO L225 Difference]: With dead ends: 454 [2021-08-12 19:23:09,976 INFO L226 Difference]: Without dead ends: 418 [2021-08-12 19:23:09,976 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:09,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-12 19:23:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 281. [2021-08-12 19:23:10,288 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) [2021-08-12 19:23:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 849 transitions. [2021-08-12 19:23:10,290 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 849 transitions. Word has length 19 [2021-08-12 19:23:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:10,290 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 849 transitions. [2021-08-12 19:23:10,290 INFO L483 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) [2021-08-12 19:23:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 849 transitions. [2021-08-12 19:23:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:10,290 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:10,290 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:10,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578 [2021-08-12 19:23:10,291 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2084098672, now seen corresponding path program 30 times [2021-08-12 19:23:10,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:10,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963625956] [2021-08-12 19:23:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:10,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:10,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963625956] [2021-08-12 19:23:10,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963625956] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:10,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:10,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:10,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466512944] [2021-08-12 19:23:10,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:10,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:10,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:10,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:10,316 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) [2021-08-12 19:23:11,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:11,959 INFO L93 Difference]: Finished difference Result 418 states and 1215 transitions. [2021-08-12 19:23:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:11,959 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 [2021-08-12 19:23:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:11,961 INFO L225 Difference]: With dead ends: 418 [2021-08-12 19:23:11,961 INFO L226 Difference]: Without dead ends: 377 [2021-08-12 19:23:11,962 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-12 19:23:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 271. [2021-08-12 19:23:12,249 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) [2021-08-12 19:23:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 823 transitions. [2021-08-12 19:23:12,251 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 823 transitions. Word has length 19 [2021-08-12 19:23:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:12,251 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 823 transitions. [2021-08-12 19:23:12,251 INFO L483 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) [2021-08-12 19:23:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 823 transitions. [2021-08-12 19:23:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:12,252 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:12,252 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:12,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579 [2021-08-12 19:23:12,252 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash -384942261, now seen corresponding path program 29 times [2021-08-12 19:23:12,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:12,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674004668] [2021-08-12 19:23:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:12,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:12,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674004668] [2021-08-12 19:23:12,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674004668] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:12,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:12,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:12,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131860629] [2021-08-12 19:23:12,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:12,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:12,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:12,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:12,280 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) [2021-08-12 19:23:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:14,123 INFO L93 Difference]: Finished difference Result 430 states and 1236 transitions. [2021-08-12 19:23:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:14,123 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 [2021-08-12 19:23:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:14,125 INFO L225 Difference]: With dead ends: 430 [2021-08-12 19:23:14,125 INFO L226 Difference]: Without dead ends: 395 [2021-08-12 19:23:14,126 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:23:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-12 19:23:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 277. [2021-08-12 19:23:14,419 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) [2021-08-12 19:23:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 837 transitions. [2021-08-12 19:23:14,421 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 837 transitions. Word has length 19 [2021-08-12 19:23:14,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:14,421 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 837 transitions. [2021-08-12 19:23:14,421 INFO L483 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) [2021-08-12 19:23:14,421 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 837 transitions. [2021-08-12 19:23:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:14,421 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:14,421 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:14,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580 [2021-08-12 19:23:14,421 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash -114432569, now seen corresponding path program 30 times [2021-08-12 19:23:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:14,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685079850] [2021-08-12 19:23:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:14,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:14,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685079850] [2021-08-12 19:23:14,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685079850] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:14,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:14,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:14,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413129825] [2021-08-12 19:23:14,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:14,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:14,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:14,453 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) [2021-08-12 19:23:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:16,159 INFO L93 Difference]: Finished difference Result 408 states and 1194 transitions. [2021-08-12 19:23:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:16,160 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 [2021-08-12 19:23:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:16,162 INFO L225 Difference]: With dead ends: 408 [2021-08-12 19:23:16,162 INFO L226 Difference]: Without dead ends: 379 [2021-08-12 19:23:16,162 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:23:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-12 19:23:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 255. [2021-08-12 19:23:16,415 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) [2021-08-12 19:23:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-08-12 19:23:16,417 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-08-12 19:23:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:16,417 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-08-12 19:23:16,417 INFO L483 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) [2021-08-12 19:23:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-08-12 19:23:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:16,418 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:16,418 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:16,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581 [2021-08-12 19:23:16,423 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:16,423 INFO L82 PathProgramCache]: Analyzing trace with hash 401252280, now seen corresponding path program 31 times [2021-08-12 19:23:16,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:16,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472627192] [2021-08-12 19:23:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:16,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:16,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472627192] [2021-08-12 19:23:16,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472627192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:16,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271337680] [2021-08-12 19:23:16,447 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 [2021-08-12 19:23:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:16,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271337680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:16,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:16,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:23:16,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781225657] [2021-08-12 19:23:16,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:23:16,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:16,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:23:16,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:16,516 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) [2021-08-12 19:23:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:18,724 INFO L93 Difference]: Finished difference Result 515 states and 1455 transitions. [2021-08-12 19:23:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:18,724 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 [2021-08-12 19:23:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:18,727 INFO L225 Difference]: With dead ends: 515 [2021-08-12 19:23:18,727 INFO L226 Difference]: Without dead ends: 461 [2021-08-12 19:23:18,727 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:23:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-12 19:23:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 255. [2021-08-12 19:23:18,982 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) [2021-08-12 19:23:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-08-12 19:23:18,984 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-08-12 19:23:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:18,984 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-08-12 19:23:18,984 INFO L483 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) [2021-08-12 19:23:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-08-12 19:23:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:18,985 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:18,985 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:19,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:19,205 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash 317204657, now seen corresponding path program 31 times [2021-08-12 19:23:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:19,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820422391] [2021-08-12 19:23:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:19,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820422391] [2021-08-12 19:23:19,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820422391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102815394] [2021-08-12 19:23:19,235 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 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 [2021-08-12 19:23:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:19,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:19,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:19,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102815394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:19,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:19,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:23:19,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195010740] [2021-08-12 19:23:19,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:23:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:23:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:23:19,297 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) [2021-08-12 19:23:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:21,064 INFO L93 Difference]: Finished difference Result 457 states and 1330 transitions. [2021-08-12 19:23:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:21,065 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 [2021-08-12 19:23:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:21,067 INFO L225 Difference]: With dead ends: 457 [2021-08-12 19:23:21,067 INFO L226 Difference]: Without dead ends: 428 [2021-08-12 19:23:21,067 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:23:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-12 19:23:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 255. [2021-08-12 19:23:21,331 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) [2021-08-12 19:23:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-08-12 19:23:21,333 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-08-12 19:23:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:21,333 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-08-12 19:23:21,333 INFO L483 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) [2021-08-12 19:23:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-08-12 19:23:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:21,333 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:21,334 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:21,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-08-12 19:23:21,550 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash -27612327, now seen corresponding path program 32 times [2021-08-12 19:23:21,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:21,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658602831] [2021-08-12 19:23:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:21,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:21,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658602831] [2021-08-12 19:23:21,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658602831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:21,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901290686] [2021-08-12 19:23:21,574 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 [2021-08-12 19:23:21,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:21,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:21,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:21,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901290686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:21,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:21,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:23:21,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356619919] [2021-08-12 19:23:21,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:23:21,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:21,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:23:21,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:23:21,642 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) [2021-08-12 19:23:23,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:23,498 INFO L93 Difference]: Finished difference Result 454 states and 1320 transitions. [2021-08-12 19:23:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:23,499 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 [2021-08-12 19:23:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:23,501 INFO L225 Difference]: With dead ends: 454 [2021-08-12 19:23:23,501 INFO L226 Difference]: Without dead ends: 417 [2021-08-12 19:23:23,501 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-12 19:23:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 271. [2021-08-12 19:23:23,784 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) [2021-08-12 19:23:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-08-12 19:23:23,786 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-08-12 19:23:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:23,786 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-08-12 19:23:23,786 INFO L483 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) [2021-08-12 19:23:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-08-12 19:23:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:23,786 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:23,786 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:23,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-08-12 19:23:23,989 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash 4334626, now seen corresponding path program 32 times [2021-08-12 19:23:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:23,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918932391] [2021-08-12 19:23:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:24,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:24,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918932391] [2021-08-12 19:23:24,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918932391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:24,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954750648] [2021-08-12 19:23:24,019 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 [2021-08-12 19:23:24,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:24,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:24,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:24,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:24,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954750648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:24,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:24,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:23:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240459135] [2021-08-12 19:23:24,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:23:24,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:24,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:23:24,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:23:24,111 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) [2021-08-12 19:23:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:26,448 INFO L93 Difference]: Finished difference Result 519 states and 1493 transitions. [2021-08-12 19:23:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:26,449 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 [2021-08-12 19:23:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:26,452 INFO L225 Difference]: With dead ends: 519 [2021-08-12 19:23:26,452 INFO L226 Difference]: Without dead ends: 489 [2021-08-12 19:23:26,452 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:23:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-12 19:23:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-08-12 19:23:26,744 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) [2021-08-12 19:23:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-08-12 19:23:26,746 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-08-12 19:23:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:26,746 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-08-12 19:23:26,746 INFO L483 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) [2021-08-12 19:23:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-08-12 19:23:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:26,746 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:26,746 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:26,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:26,961 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1867633454, now seen corresponding path program 33 times [2021-08-12 19:23:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:26,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868493898] [2021-08-12 19:23:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:27,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:27,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868493898] [2021-08-12 19:23:27,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868493898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:27,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589131906] [2021-08-12 19:23:27,019 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 [2021-08-12 19:23:27,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:23:27,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:27,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589131906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:27,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:27,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:23:27,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042102893] [2021-08-12 19:23:27,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:23:27,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:23:27,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:23:27,108 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) [2021-08-12 19:23:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:29,533 INFO L93 Difference]: Finished difference Result 528 states and 1503 transitions. [2021-08-12 19:23:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:29,533 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 [2021-08-12 19:23:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:29,536 INFO L225 Difference]: With dead ends: 528 [2021-08-12 19:23:29,536 INFO L226 Difference]: Without dead ends: 489 [2021-08-12 19:23:29,536 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:23:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-12 19:23:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-08-12 19:23:29,826 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) [2021-08-12 19:23:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 815 transitions. [2021-08-12 19:23:29,828 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 815 transitions. Word has length 19 [2021-08-12 19:23:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:29,828 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 815 transitions. [2021-08-12 19:23:29,828 INFO L483 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) [2021-08-12 19:23:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 815 transitions. [2021-08-12 19:23:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:29,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:29,829 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:30,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-08-12 19:23:30,044 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:30,045 INFO L82 PathProgramCache]: Analyzing trace with hash 451672349, now seen corresponding path program 33 times [2021-08-12 19:23:30,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:30,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192015571] [2021-08-12 19:23:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:30,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:30,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192015571] [2021-08-12 19:23:30,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192015571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:30,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549249815] [2021-08-12 19:23:30,072 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 [2021-08-12 19:23:30,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:23:30,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:30,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:30,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:30,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549249815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:30,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:30,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:23:30,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120069958] [2021-08-12 19:23:30,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:23:30,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:30,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:23:30,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:23:30,139 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) [2021-08-12 19:23:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:32,154 INFO L93 Difference]: Finished difference Result 476 states and 1381 transitions. [2021-08-12 19:23:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:32,155 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 [2021-08-12 19:23:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:32,157 INFO L225 Difference]: With dead ends: 476 [2021-08-12 19:23:32,157 INFO L226 Difference]: Without dead ends: 447 [2021-08-12 19:23:32,157 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-12 19:23:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 260. [2021-08-12 19:23:32,434 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) [2021-08-12 19:23:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 782 transitions. [2021-08-12 19:23:32,436 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 782 transitions. Word has length 19 [2021-08-12 19:23:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:32,436 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 782 transitions. [2021-08-12 19:23:32,436 INFO L483 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) [2021-08-12 19:23:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 782 transitions. [2021-08-12 19:23:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:32,436 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:32,437 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:32,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:32,652 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:32,652 INFO L82 PathProgramCache]: Analyzing trace with hash 256701904, now seen corresponding path program 34 times [2021-08-12 19:23:32,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:32,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927607310] [2021-08-12 19:23:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:32,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927607310] [2021-08-12 19:23:32,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927607310] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:32,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:32,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:32,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179592611] [2021-08-12 19:23:32,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:32,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:32,677 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) [2021-08-12 19:23:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:35,387 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2021-08-12 19:23:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:35,387 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 [2021-08-12 19:23:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:35,390 INFO L225 Difference]: With dead ends: 586 [2021-08-12 19:23:35,390 INFO L226 Difference]: Without dead ends: 532 [2021-08-12 19:23:35,390 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-12 19:23:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 264. [2021-08-12 19:23:35,679 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) [2021-08-12 19:23:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-08-12 19:23:35,681 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 19 [2021-08-12 19:23:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:35,681 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-08-12 19:23:35,681 INFO L483 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) [2021-08-12 19:23:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-08-12 19:23:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:35,681 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:35,681 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:35,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594 [2021-08-12 19:23:35,682 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2084615198, now seen corresponding path program 35 times [2021-08-12 19:23:35,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:35,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205200912] [2021-08-12 19:23:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:35,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:35,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205200912] [2021-08-12 19:23:35,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205200912] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:35,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:35,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:35,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049615463] [2021-08-12 19:23:35,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:35,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:35,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:35,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:35,709 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) [2021-08-12 19:23:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:38,388 INFO L93 Difference]: Finished difference Result 570 states and 1594 transitions. [2021-08-12 19:23:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:38,388 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 [2021-08-12 19:23:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:38,391 INFO L225 Difference]: With dead ends: 570 [2021-08-12 19:23:38,391 INFO L226 Difference]: Without dead ends: 534 [2021-08-12 19:23:38,391 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-12 19:23:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 274. [2021-08-12 19:23:38,698 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) [2021-08-12 19:23:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 813 transitions. [2021-08-12 19:23:38,700 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 813 transitions. Word has length 19 [2021-08-12 19:23:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:38,701 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 813 transitions. [2021-08-12 19:23:38,701 INFO L483 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) [2021-08-12 19:23:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 813 transitions. [2021-08-12 19:23:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:38,701 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:38,701 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:38,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595 [2021-08-12 19:23:38,701 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash -180498166, now seen corresponding path program 36 times [2021-08-12 19:23:38,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:38,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813001693] [2021-08-12 19:23:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:38,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:38,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813001693] [2021-08-12 19:23:38,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813001693] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:38,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:38,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:38,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5928884] [2021-08-12 19:23:38,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:38,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:38,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:38,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:38,729 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) [2021-08-12 19:23:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:41,133 INFO L93 Difference]: Finished difference Result 534 states and 1502 transitions. [2021-08-12 19:23:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:41,133 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 [2021-08-12 19:23:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:41,136 INFO L225 Difference]: With dead ends: 534 [2021-08-12 19:23:41,136 INFO L226 Difference]: Without dead ends: 489 [2021-08-12 19:23:41,136 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-12 19:23:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 260. [2021-08-12 19:23:41,420 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) [2021-08-12 19:23:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-08-12 19:23:41,422 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-08-12 19:23:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:41,422 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-08-12 19:23:41,422 INFO L483 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) [2021-08-12 19:23:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-08-12 19:23:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:41,423 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:41,423 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:41,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596 [2021-08-12 19:23:41,423 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:41,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:41,423 INFO L82 PathProgramCache]: Analyzing trace with hash -136390839, now seen corresponding path program 34 times [2021-08-12 19:23:41,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:41,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879444994] [2021-08-12 19:23:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:41,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879444994] [2021-08-12 19:23:41,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879444994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434904352] [2021-08-12 19:23:41,450 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 [2021-08-12 19:23:41,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:41,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:41,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434904352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:41,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:41,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:23:41,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218395990] [2021-08-12 19:23:41,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:23:41,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:41,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:23:41,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:23:41,512 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) [2021-08-12 19:23:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:44,117 INFO L93 Difference]: Finished difference Result 617 states and 1794 transitions. [2021-08-12 19:23:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:44,117 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 [2021-08-12 19:23:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:44,120 INFO L225 Difference]: With dead ends: 617 [2021-08-12 19:23:44,120 INFO L226 Difference]: Without dead ends: 588 [2021-08-12 19:23:44,120 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:23:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-08-12 19:23:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 266. [2021-08-12 19:23:44,402 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) [2021-08-12 19:23:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 798 transitions. [2021-08-12 19:23:44,404 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 798 transitions. Word has length 19 [2021-08-12 19:23:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:44,404 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 798 transitions. [2021-08-12 19:23:44,405 INFO L483 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) [2021-08-12 19:23:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 798 transitions. [2021-08-12 19:23:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:44,405 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:44,405 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:44,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-08-12 19:23:44,620 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1036563747, now seen corresponding path program 35 times [2021-08-12 19:23:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:44,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203412074] [2021-08-12 19:23:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:44,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203412074] [2021-08-12 19:23:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203412074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:44,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190421641] [2021-08-12 19:23:44,645 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 [2021-08-12 19:23:44,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:44,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:44,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190421641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:44,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:44,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:23:44,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211533359] [2021-08-12 19:23:44,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:23:44,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:44,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:23:44,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:23:44,711 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) [2021-08-12 19:23:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:47,186 INFO L93 Difference]: Finished difference Result 556 states and 1610 transitions. [2021-08-12 19:23:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:47,186 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 [2021-08-12 19:23:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:47,189 INFO L225 Difference]: With dead ends: 556 [2021-08-12 19:23:47,189 INFO L226 Difference]: Without dead ends: 521 [2021-08-12 19:23:47,189 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-12 19:23:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 278. [2021-08-12 19:23:47,513 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) [2021-08-12 19:23:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 837 transitions. [2021-08-12 19:23:47,516 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 837 transitions. Word has length 19 [2021-08-12 19:23:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:47,516 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 837 transitions. [2021-08-12 19:23:47,516 INFO L483 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) [2021-08-12 19:23:47,516 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 837 transitions. [2021-08-12 19:23:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:47,516 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:47,516 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-08-12 19:23:47,732 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2043043929, now seen corresponding path program 36 times [2021-08-12 19:23:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:47,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703558981] [2021-08-12 19:23:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:47,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:47,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703558981] [2021-08-12 19:23:47,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703558981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:47,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454413981] [2021-08-12 19:23:47,758 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 [2021-08-12 19:23:47,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:23:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:47,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454413981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:47,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:47,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:23:47,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822071039] [2021-08-12 19:23:47,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:23:47,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:47,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:23:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:23:47,822 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) [2021-08-12 19:23:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:50,117 INFO L93 Difference]: Finished difference Result 534 states and 1558 transitions. [2021-08-12 19:23:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:50,117 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 [2021-08-12 19:23:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:50,120 INFO L225 Difference]: With dead ends: 534 [2021-08-12 19:23:50,120 INFO L226 Difference]: Without dead ends: 505 [2021-08-12 19:23:50,120 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-12 19:23:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-08-12 19:23:50,409 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) [2021-08-12 19:23:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-08-12 19:23:50,411 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-08-12 19:23:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:50,411 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-08-12 19:23:50,411 INFO L483 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) [2021-08-12 19:23:50,411 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-08-12 19:23:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:50,412 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:50,412 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:50,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-08-12 19:23:50,627 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:50,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:50,627 INFO L82 PathProgramCache]: Analyzing trace with hash -695873807, now seen corresponding path program 37 times [2021-08-12 19:23:50,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:50,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426575835] [2021-08-12 19:23:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:50,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:50,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426575835] [2021-08-12 19:23:50,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426575835] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:50,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:50,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:50,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860929076] [2021-08-12 19:23:50,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:50,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:50,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:50,652 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) [2021-08-12 19:23:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:53,186 INFO L93 Difference]: Finished difference Result 536 states and 1546 transitions. [2021-08-12 19:23:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:53,187 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 [2021-08-12 19:23:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:53,189 INFO L225 Difference]: With dead ends: 536 [2021-08-12 19:23:53,189 INFO L226 Difference]: Without dead ends: 499 [2021-08-12 19:23:53,189 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-12 19:23:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 272. [2021-08-12 19:23:53,555 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) [2021-08-12 19:23:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-08-12 19:23:53,557 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-08-12 19:23:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:53,557 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-08-12 19:23:53,557 INFO L483 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) [2021-08-12 19:23:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-08-12 19:23:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:53,557 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:53,557 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:53,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602 [2021-08-12 19:23:53,558 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:53,558 INFO L82 PathProgramCache]: Analyzing trace with hash -315136167, now seen corresponding path program 38 times [2021-08-12 19:23:53,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:53,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99869655] [2021-08-12 19:23:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:53,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:53,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99869655] [2021-08-12 19:23:53,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99869655] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:23:53,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:23:53,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:23:53,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517526064] [2021-08-12 19:23:53,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:23:53,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:23:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:23:53,582 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) [2021-08-12 19:23:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:55,994 INFO L93 Difference]: Finished difference Result 526 states and 1509 transitions. [2021-08-12 19:23:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:55,995 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 [2021-08-12 19:23:55,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:55,997 INFO L225 Difference]: With dead ends: 526 [2021-08-12 19:23:55,997 INFO L226 Difference]: Without dead ends: 489 [2021-08-12 19:23:55,998 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-12 19:23:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 276. [2021-08-12 19:23:56,308 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) [2021-08-12 19:23:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-08-12 19:23:56,311 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-08-12 19:23:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:56,311 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-08-12 19:23:56,311 INFO L483 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) [2021-08-12 19:23:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-08-12 19:23:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:56,311 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:56,311 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:56,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603 [2021-08-12 19:23:56,311 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1236489122, now seen corresponding path program 37 times [2021-08-12 19:23:56,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:56,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917628271] [2021-08-12 19:23:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:56,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917628271] [2021-08-12 19:23:56,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917628271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106489220] [2021-08-12 19:23:56,342 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 [2021-08-12 19:23:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:23:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:56,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106489220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:56,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:56,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:23:56,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209225743] [2021-08-12 19:23:56,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:23:56,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:23:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:23:56,427 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) [2021-08-12 19:23:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:59,484 INFO L93 Difference]: Finished difference Result 621 states and 1790 transitions. [2021-08-12 19:23:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:23:59,485 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 [2021-08-12 19:23:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:59,487 INFO L225 Difference]: With dead ends: 621 [2021-08-12 19:23:59,487 INFO L226 Difference]: Without dead ends: 591 [2021-08-12 19:23:59,487 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:23:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-12 19:23:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 282. [2021-08-12 19:23:59,826 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) [2021-08-12 19:23:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 862 transitions. [2021-08-12 19:23:59,829 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 862 transitions. Word has length 19 [2021-08-12 19:23:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:59,829 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 862 transitions. [2021-08-12 19:23:59,829 INFO L483 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) [2021-08-12 19:23:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 862 transitions. [2021-08-12 19:23:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:23:59,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:59,829 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:00,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-08-12 19:24:00,044 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2128316998, now seen corresponding path program 38 times [2021-08-12 19:24:00,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:00,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507195821] [2021-08-12 19:24:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:00,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:00,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507195821] [2021-08-12 19:24:00,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507195821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:00,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807280660] [2021-08-12 19:24:00,072 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 [2021-08-12 19:24:00,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:24:00,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:00,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:00,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807280660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:00,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:00,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:24:00,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776725572] [2021-08-12 19:24:00,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:24:00,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:24:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:00,152 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) [2021-08-12 19:24:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:03,164 INFO L93 Difference]: Finished difference Result 603 states and 1721 transitions. [2021-08-12 19:24:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:03,165 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 [2021-08-12 19:24:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:03,167 INFO L225 Difference]: With dead ends: 603 [2021-08-12 19:24:03,167 INFO L226 Difference]: Without dead ends: 567 [2021-08-12 19:24:03,167 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:24:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-12 19:24:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 281. [2021-08-12 19:24:03,485 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) [2021-08-12 19:24:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-08-12 19:24:03,487 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-08-12 19:24:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:03,487 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-08-12 19:24:03,488 INFO L483 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) [2021-08-12 19:24:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-08-12 19:24:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:03,488 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:03,488 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:03,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:03,704 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:03,704 INFO L82 PathProgramCache]: Analyzing trace with hash -900007947, now seen corresponding path program 39 times [2021-08-12 19:24:03,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:03,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405573271] [2021-08-12 19:24:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:03,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:03,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405573271] [2021-08-12 19:24:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405573271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:03,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183175435] [2021-08-12 19:24:03,730 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 [2021-08-12 19:24:03,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:24:03,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:03,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183175435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:03,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:03,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:24:03,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62787623] [2021-08-12 19:24:03,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:24:03,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:03,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:24:03,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:03,799 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) [2021-08-12 19:24:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:06,615 INFO L93 Difference]: Finished difference Result 587 states and 1675 transitions. [2021-08-12 19:24:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:06,615 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 [2021-08-12 19:24:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:06,618 INFO L225 Difference]: With dead ends: 587 [2021-08-12 19:24:06,618 INFO L226 Difference]: Without dead ends: 550 [2021-08-12 19:24:06,618 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:24:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-08-12 19:24:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 281. [2021-08-12 19:24:06,965 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) [2021-08-12 19:24:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-08-12 19:24:06,967 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-08-12 19:24:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:06,967 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-08-12 19:24:06,967 INFO L483 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) [2021-08-12 19:24:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-08-12 19:24:06,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:06,967 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:06,967 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:07,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:07,183 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1436888778, now seen corresponding path program 39 times [2021-08-12 19:24:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:07,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11462326] [2021-08-12 19:24:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:07,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:07,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11462326] [2021-08-12 19:24:07,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11462326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:07,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150018158] [2021-08-12 19:24:07,213 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 [2021-08-12 19:24:07,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:24:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:07,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:07,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150018158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:07,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:07,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:24:07,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905698679] [2021-08-12 19:24:07,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:24:07,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:24:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:07,311 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) [2021-08-12 19:24:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:10,677 INFO L93 Difference]: Finished difference Result 651 states and 1840 transitions. [2021-08-12 19:24:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:10,677 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 [2021-08-12 19:24:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:10,680 INFO L225 Difference]: With dead ends: 651 [2021-08-12 19:24:10,680 INFO L226 Difference]: Without dead ends: 621 [2021-08-12 19:24:10,680 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:24:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-12 19:24:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 272. [2021-08-12 19:24:10,995 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) [2021-08-12 19:24:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-08-12 19:24:10,997 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-08-12 19:24:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:10,997 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-08-12 19:24:10,997 INFO L483 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) [2021-08-12 19:24:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-08-12 19:24:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:10,998 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:10,998 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:11,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-08-12 19:24:11,198 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:11,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:11,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1355648106, now seen corresponding path program 40 times [2021-08-12 19:24:11,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:11,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567902042] [2021-08-12 19:24:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:11,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:11,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567902042] [2021-08-12 19:24:11,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567902042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:11,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068065996] [2021-08-12 19:24:11,252 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 [2021-08-12 19:24:11,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:24:11,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:11,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068065996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:11,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:11,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:24:11,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623586775] [2021-08-12 19:24:11,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:24:11,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:24:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:11,365 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) [2021-08-12 19:24:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:14,413 INFO L93 Difference]: Finished difference Result 606 states and 1715 transitions. [2021-08-12 19:24:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:14,413 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 [2021-08-12 19:24:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:14,416 INFO L225 Difference]: With dead ends: 606 [2021-08-12 19:24:14,416 INFO L226 Difference]: Without dead ends: 567 [2021-08-12 19:24:14,416 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:24:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-12 19:24:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 272. [2021-08-12 19:24:14,743 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) [2021-08-12 19:24:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-08-12 19:24:14,745 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-08-12 19:24:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:14,745 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-08-12 19:24:14,745 INFO L483 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) [2021-08-12 19:24:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-08-12 19:24:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:14,746 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:14,746 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:14,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:14,949 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -620013387, now seen corresponding path program 40 times [2021-08-12 19:24:14,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:14,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466309373] [2021-08-12 19:24:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:14,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:14,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466309373] [2021-08-12 19:24:14,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466309373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:14,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203504339] [2021-08-12 19:24:14,979 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 [2021-08-12 19:24:15,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:24:15,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:15,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:15,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:15,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203504339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:15,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:15,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:24:15,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417986582] [2021-08-12 19:24:15,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:24:15,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:24:15,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:15,064 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) [2021-08-12 19:24:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:17,689 INFO L93 Difference]: Finished difference Result 559 states and 1620 transitions. [2021-08-12 19:24:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:17,690 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 [2021-08-12 19:24:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:17,693 INFO L225 Difference]: With dead ends: 559 [2021-08-12 19:24:17,693 INFO L226 Difference]: Without dead ends: 530 [2021-08-12 19:24:17,693 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:24:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-08-12 19:24:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 264. [2021-08-12 19:24:17,999 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) [2021-08-12 19:24:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 794 transitions. [2021-08-12 19:24:18,001 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 794 transitions. Word has length 19 [2021-08-12 19:24:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:18,001 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 794 transitions. [2021-08-12 19:24:18,001 INFO L483 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) [2021-08-12 19:24:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 794 transitions. [2021-08-12 19:24:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:18,001 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:18,001 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:18,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:18,219 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:18,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:18,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1979491946, now seen corresponding path program 41 times [2021-08-12 19:24:18,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:18,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336606622] [2021-08-12 19:24:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:18,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:18,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336606622] [2021-08-12 19:24:18,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336606622] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:18,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:18,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:18,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452315688] [2021-08-12 19:24:18,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:18,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:18,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:18,249 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) [2021-08-12 19:24:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:21,137 INFO L93 Difference]: Finished difference Result 581 states and 1629 transitions. [2021-08-12 19:24:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:21,138 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 [2021-08-12 19:24:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:21,141 INFO L225 Difference]: With dead ends: 581 [2021-08-12 19:24:21,141 INFO L226 Difference]: Without dead ends: 545 [2021-08-12 19:24:21,141 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-12 19:24:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 274. [2021-08-12 19:24:21,471 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) [2021-08-12 19:24:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 819 transitions. [2021-08-12 19:24:21,473 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 819 transitions. Word has length 19 [2021-08-12 19:24:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:21,473 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 819 transitions. [2021-08-12 19:24:21,473 INFO L483 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) [2021-08-12 19:24:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 819 transitions. [2021-08-12 19:24:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:21,474 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:21,474 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:21,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616 [2021-08-12 19:24:21,474 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:21,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:21,474 INFO L82 PathProgramCache]: Analyzing trace with hash 877577794, now seen corresponding path program 42 times [2021-08-12 19:24:21,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:21,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881182934] [2021-08-12 19:24:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:21,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:21,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881182934] [2021-08-12 19:24:21,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881182934] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:21,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:21,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:21,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97735424] [2021-08-12 19:24:21,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:21,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:21,502 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) [2021-08-12 19:24:24,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:24,105 INFO L93 Difference]: Finished difference Result 545 states and 1537 transitions. [2021-08-12 19:24:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:24,105 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 [2021-08-12 19:24:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:24,108 INFO L225 Difference]: With dead ends: 545 [2021-08-12 19:24:24,108 INFO L226 Difference]: Without dead ends: 504 [2021-08-12 19:24:24,108 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-08-12 19:24:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 264. [2021-08-12 19:24:24,432 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) [2021-08-12 19:24:24,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 793 transitions. [2021-08-12 19:24:24,435 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 793 transitions. Word has length 19 [2021-08-12 19:24:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:24,435 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 793 transitions. [2021-08-12 19:24:24,435 INFO L483 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) [2021-08-12 19:24:24,435 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 793 transitions. [2021-08-12 19:24:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:24,435 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:24,436 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:24,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617 [2021-08-12 19:24:24,436 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:24,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1591463139, now seen corresponding path program 41 times [2021-08-12 19:24:24,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:24,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727285331] [2021-08-12 19:24:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:24,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:24,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727285331] [2021-08-12 19:24:24,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727285331] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:24,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:24,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:24,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921744743] [2021-08-12 19:24:24,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:24,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:24,462 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) [2021-08-12 19:24:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:27,131 INFO L93 Difference]: Finished difference Result 533 states and 1520 transitions. [2021-08-12 19:24:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:27,132 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 [2021-08-12 19:24:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:27,135 INFO L225 Difference]: With dead ends: 533 [2021-08-12 19:24:27,135 INFO L226 Difference]: Without dead ends: 498 [2021-08-12 19:24:27,135 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-12 19:24:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 276. [2021-08-12 19:24:27,476 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) [2021-08-12 19:24:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 830 transitions. [2021-08-12 19:24:27,478 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 830 transitions. Word has length 19 [2021-08-12 19:24:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:27,478 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 830 transitions. [2021-08-12 19:24:27,479 INFO L483 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) [2021-08-12 19:24:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 830 transitions. [2021-08-12 19:24:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:27,479 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:27,479 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:27,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618 [2021-08-12 19:24:27,479 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:27,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1320953447, now seen corresponding path program 42 times [2021-08-12 19:24:27,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:27,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229975097] [2021-08-12 19:24:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:27,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:27,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229975097] [2021-08-12 19:24:27,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229975097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:27,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:27,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:27,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241402668] [2021-08-12 19:24:27,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:27,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:27,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:27,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:27,509 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) [2021-08-12 19:24:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:29,949 INFO L93 Difference]: Finished difference Result 511 states and 1478 transitions. [2021-08-12 19:24:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:29,949 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 [2021-08-12 19:24:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:29,952 INFO L225 Difference]: With dead ends: 511 [2021-08-12 19:24:29,952 INFO L226 Difference]: Without dead ends: 482 [2021-08-12 19:24:29,952 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-12 19:24:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 261. [2021-08-12 19:24:30,275 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) [2021-08-12 19:24:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 784 transitions. [2021-08-12 19:24:30,277 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 784 transitions. Word has length 19 [2021-08-12 19:24:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:30,277 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 784 transitions. [2021-08-12 19:24:30,277 INFO L483 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) [2021-08-12 19:24:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 784 transitions. [2021-08-12 19:24:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:30,278 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:30,278 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:30,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619 [2021-08-12 19:24:30,278 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -549537380, now seen corresponding path program 43 times [2021-08-12 19:24:30,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:30,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267376996] [2021-08-12 19:24:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:30,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267376996] [2021-08-12 19:24:30,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267376996] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:30,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:30,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:30,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465197609] [2021-08-12 19:24:30,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:30,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:30,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:30,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:30,303 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) [2021-08-12 19:24:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:32,306 INFO L93 Difference]: Finished difference Result 437 states and 1231 transitions. [2021-08-12 19:24:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:32,306 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 [2021-08-12 19:24:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:32,309 INFO L225 Difference]: With dead ends: 437 [2021-08-12 19:24:32,309 INFO L226 Difference]: Without dead ends: 383 [2021-08-12 19:24:32,309 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-12 19:24:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 265. [2021-08-12 19:24:32,620 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) [2021-08-12 19:24:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 790 transitions. [2021-08-12 19:24:32,623 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 790 transitions. Word has length 19 [2021-08-12 19:24:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:32,623 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 790 transitions. [2021-08-12 19:24:32,623 INFO L483 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) [2021-08-12 19:24:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 790 transitions. [2021-08-12 19:24:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:32,623 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:32,623 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:32,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable620 [2021-08-12 19:24:32,623 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:32,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1404112814, now seen corresponding path program 44 times [2021-08-12 19:24:32,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:32,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068053640] [2021-08-12 19:24:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:32,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:32,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068053640] [2021-08-12 19:24:32,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068053640] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:32,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:32,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850247884] [2021-08-12 19:24:32,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:32,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:32,650 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) [2021-08-12 19:24:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:34,937 INFO L93 Difference]: Finished difference Result 460 states and 1279 transitions. [2021-08-12 19:24:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:34,938 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 [2021-08-12 19:24:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:34,940 INFO L225 Difference]: With dead ends: 460 [2021-08-12 19:24:34,940 INFO L226 Difference]: Without dead ends: 424 [2021-08-12 19:24:34,941 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-08-12 19:24:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 275. [2021-08-12 19:24:35,276 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) [2021-08-12 19:24:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 815 transitions. [2021-08-12 19:24:35,279 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 815 transitions. Word has length 19 [2021-08-12 19:24:35,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:35,279 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 815 transitions. [2021-08-12 19:24:35,279 INFO L483 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) [2021-08-12 19:24:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 815 transitions. [2021-08-12 19:24:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:35,279 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:35,279 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:35,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621 [2021-08-12 19:24:35,279 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash -986737450, now seen corresponding path program 45 times [2021-08-12 19:24:35,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:35,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357742764] [2021-08-12 19:24:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:35,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357742764] [2021-08-12 19:24:35,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357742764] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:35,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:35,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:35,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027062154] [2021-08-12 19:24:35,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:35,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:35,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:35,307 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) [2021-08-12 19:24:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:37,308 INFO L93 Difference]: Finished difference Result 424 states and 1187 transitions. [2021-08-12 19:24:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:37,309 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 [2021-08-12 19:24:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:37,311 INFO L225 Difference]: With dead ends: 424 [2021-08-12 19:24:37,311 INFO L226 Difference]: Without dead ends: 379 [2021-08-12 19:24:37,311 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-12 19:24:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 261. [2021-08-12 19:24:37,629 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) [2021-08-12 19:24:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 780 transitions. [2021-08-12 19:24:37,631 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 780 transitions. Word has length 19 [2021-08-12 19:24:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:37,631 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 780 transitions. [2021-08-12 19:24:37,631 INFO L483 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) [2021-08-12 19:24:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 780 transitions. [2021-08-12 19:24:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:37,632 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:37,632 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:37,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622 [2021-08-12 19:24:37,632 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:37,632 INFO L82 PathProgramCache]: Analyzing trace with hash 879484852, now seen corresponding path program 46 times [2021-08-12 19:24:37,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:37,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935440520] [2021-08-12 19:24:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:37,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:37,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935440520] [2021-08-12 19:24:37,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935440520] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:37,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:37,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002879280] [2021-08-12 19:24:37,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:37,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:37,656 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) [2021-08-12 19:24:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:39,576 INFO L93 Difference]: Finished difference Result 423 states and 1193 transitions. [2021-08-12 19:24:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:39,577 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 [2021-08-12 19:24:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:39,579 INFO L225 Difference]: With dead ends: 423 [2021-08-12 19:24:39,579 INFO L226 Difference]: Without dead ends: 381 [2021-08-12 19:24:39,579 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:39,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-12 19:24:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 263. [2021-08-12 19:24:39,895 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) [2021-08-12 19:24:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 783 transitions. [2021-08-12 19:24:39,897 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 783 transitions. Word has length 19 [2021-08-12 19:24:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:39,898 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 783 transitions. [2021-08-12 19:24:39,898 INFO L483 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) [2021-08-12 19:24:39,898 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 783 transitions. [2021-08-12 19:24:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:39,898 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:39,898 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:39,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623 [2021-08-12 19:24:39,898 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:39,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash 199463632, now seen corresponding path program 47 times [2021-08-12 19:24:39,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:39,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240683803] [2021-08-12 19:24:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:39,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:39,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240683803] [2021-08-12 19:24:39,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240683803] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:39,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:39,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:39,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976072659] [2021-08-12 19:24:39,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:39,925 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) [2021-08-12 19:24:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:41,829 INFO L93 Difference]: Finished difference Result 411 states and 1161 transitions. [2021-08-12 19:24:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:41,830 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 [2021-08-12 19:24:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:41,832 INFO L225 Difference]: With dead ends: 411 [2021-08-12 19:24:41,832 INFO L226 Difference]: Without dead ends: 375 [2021-08-12 19:24:41,832 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-12 19:24:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 273. [2021-08-12 19:24:42,169 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) [2021-08-12 19:24:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 808 transitions. [2021-08-12 19:24:42,171 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 808 transitions. Word has length 19 [2021-08-12 19:24:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:42,171 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 808 transitions. [2021-08-12 19:24:42,171 INFO L483 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) [2021-08-12 19:24:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 808 transitions. [2021-08-12 19:24:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:42,172 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:42,172 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:42,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624 [2021-08-12 19:24:42,172 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2103580664, now seen corresponding path program 48 times [2021-08-12 19:24:42,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:42,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297988692] [2021-08-12 19:24:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:42,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:42,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297988692] [2021-08-12 19:24:42,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297988692] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:24:42,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:24:42,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:24:42,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015840917] [2021-08-12 19:24:42,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:24:42,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:42,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:24:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:24:42,205 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) [2021-08-12 19:24:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:43,843 INFO L93 Difference]: Finished difference Result 375 states and 1069 transitions. [2021-08-12 19:24:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:43,843 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 [2021-08-12 19:24:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:43,846 INFO L225 Difference]: With dead ends: 375 [2021-08-12 19:24:43,846 INFO L226 Difference]: Without dead ends: 328 [2021-08-12 19:24:43,846 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-08-12 19:24:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 257. [2021-08-12 19:24:44,166 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) [2021-08-12 19:24:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 772 transitions. [2021-08-12 19:24:44,168 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 772 transitions. Word has length 19 [2021-08-12 19:24:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:44,168 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 772 transitions. [2021-08-12 19:24:44,168 INFO L483 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) [2021-08-12 19:24:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 772 transitions. [2021-08-12 19:24:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:44,169 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:44,169 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:44,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625 [2021-08-12 19:24:44,169 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:44,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1070480311, now seen corresponding path program 43 times [2021-08-12 19:24:44,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:44,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483098098] [2021-08-12 19:24:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:44,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:44,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483098098] [2021-08-12 19:24:44,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483098098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:44,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102450035] [2021-08-12 19:24:44,195 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 [2021-08-12 19:24:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:44,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:44,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:44,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102450035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:44,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:44,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:24:44,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320778234] [2021-08-12 19:24:44,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:24:44,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:24:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:24:44,260 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) [2021-08-12 19:24:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:46,565 INFO L93 Difference]: Finished difference Result 478 states and 1391 transitions. [2021-08-12 19:24:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:46,566 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 [2021-08-12 19:24:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:46,568 INFO L225 Difference]: With dead ends: 478 [2021-08-12 19:24:46,568 INFO L226 Difference]: Without dead ends: 449 [2021-08-12 19:24:46,569 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:24:46,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-12 19:24:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 235. [2021-08-12 19:24:46,884 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) [2021-08-12 19:24:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 707 transitions. [2021-08-12 19:24:46,886 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 707 transitions. Word has length 19 [2021-08-12 19:24:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:46,886 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 707 transitions. [2021-08-12 19:24:46,886 INFO L483 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) [2021-08-12 19:24:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 707 transitions. [2021-08-12 19:24:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:46,887 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:46,887 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:47,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:47,103 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:47,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash 170307403, now seen corresponding path program 44 times [2021-08-12 19:24:47,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:47,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759000364] [2021-08-12 19:24:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:47,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:47,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759000364] [2021-08-12 19:24:47,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759000364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:47,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270658593] [2021-08-12 19:24:47,126 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 [2021-08-12 19:24:47,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:24:47,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:47,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270658593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:47,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:47,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:24:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86506600] [2021-08-12 19:24:47,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:24:47,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:24:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:24:47,193 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) [2021-08-12 19:24:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:49,547 INFO L93 Difference]: Finished difference Result 466 states and 1321 transitions. [2021-08-12 19:24:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:49,547 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 [2021-08-12 19:24:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:49,550 INFO L225 Difference]: With dead ends: 466 [2021-08-12 19:24:49,550 INFO L226 Difference]: Without dead ends: 431 [2021-08-12 19:24:49,550 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:24:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-12 19:24:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 241. [2021-08-12 19:24:49,875 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) [2021-08-12 19:24:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 721 transitions. [2021-08-12 19:24:49,878 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 721 transitions. Word has length 19 [2021-08-12 19:24:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:49,878 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 721 transitions. [2021-08-12 19:24:49,878 INFO L483 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) [2021-08-12 19:24:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 721 transitions. [2021-08-12 19:24:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:49,878 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:49,878 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:50,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-08-12 19:24:50,079 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1045052217, now seen corresponding path program 45 times [2021-08-12 19:24:50,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:50,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041715261] [2021-08-12 19:24:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:50,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:50,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041715261] [2021-08-12 19:24:50,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041715261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:50,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080801471] [2021-08-12 19:24:50,112 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 [2021-08-12 19:24:50,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:24:50,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:50,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080801471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:50,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:50,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:24:50,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530976032] [2021-08-12 19:24:50,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:24:50,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:50,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:24:50,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:24:50,188 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) [2021-08-12 19:24:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:52,370 INFO L93 Difference]: Finished difference Result 444 states and 1279 transitions. [2021-08-12 19:24:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:52,370 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 [2021-08-12 19:24:52,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:52,373 INFO L225 Difference]: With dead ends: 444 [2021-08-12 19:24:52,373 INFO L226 Difference]: Without dead ends: 415 [2021-08-12 19:24:52,373 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:24:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-12 19:24:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 214. [2021-08-12 19:24:52,651 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) [2021-08-12 19:24:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 639 transitions. [2021-08-12 19:24:52,653 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 639 transitions. Word has length 19 [2021-08-12 19:24:52,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:52,653 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 639 transitions. [2021-08-12 19:24:52,653 INFO L483 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) [2021-08-12 19:24:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 639 transitions. [2021-08-12 19:24:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:52,654 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:52,654 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:52,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-08-12 19:24:52,861 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash -990658535, now seen corresponding path program 46 times [2021-08-12 19:24:52,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:52,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901990055] [2021-08-12 19:24:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:52,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:52,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901990055] [2021-08-12 19:24:52,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901990055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:52,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152164810] [2021-08-12 19:24:52,882 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 [2021-08-12 19:24:52,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:24:52,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:52,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152164810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:52,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:52,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:24:52,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354334712] [2021-08-12 19:24:52,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:24:52,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:52,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:24:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:24:52,947 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) [2021-08-12 19:24:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:54,797 INFO L93 Difference]: Finished difference Result 396 states and 1136 transitions. [2021-08-12 19:24:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:54,798 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 [2021-08-12 19:24:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:54,800 INFO L225 Difference]: With dead ends: 396 [2021-08-12 19:24:54,800 INFO L226 Difference]: Without dead ends: 355 [2021-08-12 19:24:54,801 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:24:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-12 19:24:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 217. [2021-08-12 19:24:55,074 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) [2021-08-12 19:24:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-08-12 19:24:55,077 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-08-12 19:24:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:55,077 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-08-12 19:24:55,077 INFO L483 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) [2021-08-12 19:24:55,077 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-08-12 19:24:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:55,077 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:55,077 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:55,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-08-12 19:24:55,293 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash -33107299, now seen corresponding path program 47 times [2021-08-12 19:24:55,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:55,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175566109] [2021-08-12 19:24:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:55,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:55,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175566109] [2021-08-12 19:24:55,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175566109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:55,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947393933] [2021-08-12 19:24:55,318 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 [2021-08-12 19:24:55,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:24:55,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:55,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:55,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947393933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:55,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:55,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:24:55,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961681220] [2021-08-12 19:24:55,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:24:55,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:55,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:24:55,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:55,403 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) [2021-08-12 19:24:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:57,350 INFO L93 Difference]: Finished difference Result 384 states and 1103 transitions. [2021-08-12 19:24:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:57,351 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 [2021-08-12 19:24:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:57,353 INFO L225 Difference]: With dead ends: 384 [2021-08-12 19:24:57,353 INFO L226 Difference]: Without dead ends: 349 [2021-08-12 19:24:57,353 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:24:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-12 19:24:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 229. [2021-08-12 19:24:57,667 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) [2021-08-12 19:24:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 687 transitions. [2021-08-12 19:24:57,670 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 687 transitions. Word has length 19 [2021-08-12 19:24:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:57,670 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 687 transitions. [2021-08-12 19:24:57,670 INFO L483 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) [2021-08-12 19:24:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 687 transitions. [2021-08-12 19:24:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:57,671 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:57,671 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:57,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:57,876 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1248466919, now seen corresponding path program 48 times [2021-08-12 19:24:57,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:57,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750028639] [2021-08-12 19:24:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:57,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:57,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750028639] [2021-08-12 19:24:57,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750028639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:57,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130437357] [2021-08-12 19:24:57,915 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 [2021-08-12 19:24:57,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:24:57,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:57,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:57,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130437357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:57,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:57,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:24:57,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696575492] [2021-08-12 19:24:57,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:24:57,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:24:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:57,990 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) [2021-08-12 19:24:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:59,543 INFO L93 Difference]: Finished difference Result 349 states and 1013 transitions. [2021-08-12 19:24:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:24:59,544 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 [2021-08-12 19:24:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:59,547 INFO L225 Difference]: With dead ends: 349 [2021-08-12 19:24:59,547 INFO L226 Difference]: Without dead ends: 320 [2021-08-12 19:24:59,547 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:24:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-12 19:24:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 215. [2021-08-12 19:24:59,817 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) [2021-08-12 19:24:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 643 transitions. [2021-08-12 19:24:59,820 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 643 transitions. Word has length 19 [2021-08-12 19:24:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:59,820 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 643 transitions. [2021-08-12 19:24:59,820 INFO L483 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) [2021-08-12 19:24:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 643 transitions. [2021-08-12 19:24:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:24:59,820 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:59,820 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:00,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:00,036 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1006159271, now seen corresponding path program 49 times [2021-08-12 19:25:00,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:00,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924912028] [2021-08-12 19:25:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:00,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:00,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924912028] [2021-08-12 19:25:00,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924912028] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:25:00,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:25:00,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:25:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548178485] [2021-08-12 19:25:00,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:25:00,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:25:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:25:00,062 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) [2021-08-12 19:25:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:02,155 INFO L93 Difference]: Finished difference Result 390 states and 1113 transitions. [2021-08-12 19:25:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:25:02,155 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 [2021-08-12 19:25:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:02,160 INFO L225 Difference]: With dead ends: 390 [2021-08-12 19:25:02,160 INFO L226 Difference]: Without dead ends: 353 [2021-08-12 19:25:02,160 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:25:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-12 19:25:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 233. [2021-08-12 19:25:02,474 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) [2021-08-12 19:25:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 695 transitions. [2021-08-12 19:25:02,477 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 695 transitions. Word has length 19 [2021-08-12 19:25:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:02,477 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 695 transitions. [2021-08-12 19:25:02,477 INFO L483 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) [2021-08-12 19:25:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 695 transitions. [2021-08-12 19:25:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:25:02,477 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:02,477 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:02,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638 [2021-08-12 19:25:02,478 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:02,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1386896911, now seen corresponding path program 50 times [2021-08-12 19:25:02,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:02,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97082669] [2021-08-12 19:25:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:02,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:02,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97082669] [2021-08-12 19:25:02,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97082669] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:25:02,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:25:02,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:25:02,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608983978] [2021-08-12 19:25:02,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:25:02,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:02,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:25:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:25:02,504 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) [2021-08-12 19:25:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:04,713 INFO L93 Difference]: Finished difference Result 388 states and 1090 transitions. [2021-08-12 19:25:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:25:04,714 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 [2021-08-12 19:25:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:04,716 INFO L225 Difference]: With dead ends: 388 [2021-08-12 19:25:04,716 INFO L226 Difference]: Without dead ends: 351 [2021-08-12 19:25:04,716 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:25:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-12 19:25:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 231. [2021-08-12 19:25:05,048 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) [2021-08-12 19:25:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 688 transitions. [2021-08-12 19:25:05,051 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 688 transitions. Word has length 19 [2021-08-12 19:25:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:05,051 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 688 transitions. [2021-08-12 19:25:05,051 INFO L483 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) [2021-08-12 19:25:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 688 transitions. [2021-08-12 19:25:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:25:05,052 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:05,052 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:05,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639 [2021-08-12 19:25:05,052 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:05,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1984233569, now seen corresponding path program 51 times [2021-08-12 19:25:05,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:05,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739604814] [2021-08-12 19:25:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:05,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:05,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739604814] [2021-08-12 19:25:05,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739604814] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:25:05,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:25:05,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:25:05,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504318430] [2021-08-12 19:25:05,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:25:05,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:25:05,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:25:05,078 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) [2021-08-12 19:25:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:07,410 INFO L93 Difference]: Finished difference Result 402 states and 1131 transitions. [2021-08-12 19:25:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:25:07,411 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 [2021-08-12 19:25:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:07,414 INFO L225 Difference]: With dead ends: 402 [2021-08-12 19:25:07,414 INFO L226 Difference]: Without dead ends: 359 [2021-08-12 19:25:07,414 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:25:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-12 19:25:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-12 19:25:07,768 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) [2021-08-12 19:25:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-08-12 19:25:07,770 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 19 [2021-08-12 19:25:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:07,770 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-08-12 19:25:07,770 INFO L483 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) [2021-08-12 19:25:07,770 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-08-12 19:25:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:25:07,771 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:07,771 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:07,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640 [2021-08-12 19:25:07,771 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:07,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1454990024, now seen corresponding path program 49 times [2021-08-12 19:25:07,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:07,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431853752] [2021-08-12 19:25:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:07,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:07,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431853752] [2021-08-12 19:25:07,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431853752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:07,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446050930] [2021-08-12 19:25:07,801 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 [2021-08-12 19:25:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:25:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:07,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446050930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:07,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:07,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:25:07,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645320183] [2021-08-12 19:25:07,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:25:07,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:25:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:25:07,888 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) [2021-08-12 19:25:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:10,542 INFO L93 Difference]: Finished difference Result 491 states and 1411 transitions. [2021-08-12 19:25:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:25:10,543 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 [2021-08-12 19:25:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:10,545 INFO L225 Difference]: With dead ends: 491 [2021-08-12 19:25:10,546 INFO L226 Difference]: Without dead ends: 461 [2021-08-12 19:25:10,546 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:25:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-12 19:25:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 235. [2021-08-12 19:25:10,853 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) [2021-08-12 19:25:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 706 transitions. [2021-08-12 19:25:10,855 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 706 transitions. Word has length 19 [2021-08-12 19:25:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:10,855 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 706 transitions. [2021-08-12 19:25:10,855 INFO L483 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) [2021-08-12 19:25:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 706 transitions. [2021-08-12 19:25:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:25:10,856 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:10,856 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:11,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-08-12 19:25:11,072 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash -524828848, now seen corresponding path program 50 times [2021-08-12 19:25:11,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:11,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796219319] [2021-08-12 19:25:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:11,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:11,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796219319] [2021-08-12 19:25:11,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796219319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:11,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754723160] [2021-08-12 19:25:11,102 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 [2021-08-12 19:25:11,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:25:11,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:25:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:11,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754723160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:11,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:11,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:25:11,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277985598] [2021-08-12 19:25:11,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:25:11,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:11,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:25:11,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:25:11,186 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) [2021-08-12 19:25:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:13,949 INFO L93 Difference]: Finished difference Result 497 states and 1414 transitions. [2021-08-12 19:25:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:25:13,949 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 [2021-08-12 19:25:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:13,952 INFO L225 Difference]: With dead ends: 497 [2021-08-12 19:25:13,952 INFO L226 Difference]: Without dead ends: 461 [2021-08-12 19:25:13,952 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:25:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-12 19:25:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 232. [2021-08-12 19:25:14,264 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) [2021-08-12 19:25:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 694 transitions. [2021-08-12 19:25:14,266 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 694 transitions. Word has length 19 [2021-08-12 19:25:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:14,266 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 694 transitions. [2021-08-12 19:25:14,267 INFO L483 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) [2021-08-12 19:25:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 694 transitions. [2021-08-12 19:25:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:25:14,267 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:14,267 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:14,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-08-12 19:25:14,483 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:14,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1537521380, now seen corresponding path program 51 times [2021-08-12 19:25:14,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:14,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112366730] [2021-08-12 19:25:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:14,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:14,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112366730] [2021-08-12 19:25:14,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112366730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:14,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551766106] [2021-08-12 19:25:14,510 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 [2021-08-12 19:25:14,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:25:14,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:25:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:14,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551766106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:14,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:14,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:25:14,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338530588] [2021-08-12 19:25:14,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:25:14,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:14,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:25:14,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:25:14,584 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) [2021-08-12 19:25:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:17,239 INFO L93 Difference]: Finished difference Result 488 states and 1381 transitions. [2021-08-12 19:25:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:25:17,239 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 [2021-08-12 19:25:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:17,242 INFO L225 Difference]: With dead ends: 488 [2021-08-12 19:25:17,242 INFO L226 Difference]: Without dead ends: 446 [2021-08-12 19:25:17,242 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:25:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-12 19:25:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 230. [2021-08-12 19:25:17,540 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) [2021-08-12 19:25:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 686 transitions. [2021-08-12 19:25:17,543 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 686 transitions. Word has length 19 [2021-08-12 19:25:17,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:17,543 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 686 transitions. [2021-08-12 19:25:17,543 INFO L483 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) [2021-08-12 19:25:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 686 transitions. [2021-08-12 19:25:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:25:17,543 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:17,543 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:17,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:17,759 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash 242250915, now seen corresponding path program 52 times [2021-08-12 19:25:17,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:17,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395918054] [2021-08-12 19:25:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:17,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:17,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395918054] [2021-08-12 19:25:17,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395918054] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:25:17,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:25:17,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:25:17,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144032379] [2021-08-12 19:25:17,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:25:17,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:17,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:25:17,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:25:17,787 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) [2021-08-12 19:25:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:20,141 INFO L93 Difference]: Finished difference Result 432 states and 1207 transitions. [2021-08-12 19:25:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:25:20,142 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 [2021-08-12 19:25:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:20,145 INFO L225 Difference]: With dead ends: 432 [2021-08-12 19:25:20,145 INFO L226 Difference]: Without dead ends: 395 [2021-08-12 19:25:20,145 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:25:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-12 19:25:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 242. [2021-08-12 19:25:20,488 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) [2021-08-12 19:25:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 732 transitions. [2021-08-12 19:25:20,491 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 732 transitions. Word has length 19 [2021-08-12 19:25:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:20,491 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 732 transitions. [2021-08-12 19:25:20,491 INFO L483 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) [2021-08-12 19:25:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 732 transitions. [2021-08-12 19:25:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:25:20,491 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:20,492 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:20,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648 [2021-08-12 19:25:20,492 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:20,492 INFO L82 PathProgramCache]: Analyzing trace with hash 622988555, now seen corresponding path program 53 times [2021-08-12 19:25:20,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:20,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255754616] [2021-08-12 19:25:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:20,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255754616] [2021-08-12 19:25:20,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255754616] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:25:20,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:25:20,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 19:25:20,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944605937] [2021-08-12 19:25:20,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:25:20,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:20,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:25:20,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:25:20,521 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) Received shutdown request... [2021-08-12 19:25:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:25:21,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649 [2021-08-12 19:25:21,487 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:25:21,489 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:25:21,490 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:25:21,490 INFO L202 PluginConnector]: Adding new model word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:25:21 BasicIcfg [2021-08-12 19:25:21,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:25:21,491 INFO L168 Benchmark]: Toolchain (without parser) took 599334.09 ms. Allocated memory was 178.3 MB in the beginning and 690.0 MB in the end (delta: 511.7 MB). Free memory was 159.4 MB in the beginning and 524.7 MB in the end (delta: -365.3 MB). Peak memory consumption was 146.8 MB. Max. memory is 8.0 GB. [2021-08-12 19:25:21,491 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 178.3 MB. Free memory was 160.9 MB in the beginning and 160.7 MB in the end (delta: 160.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:25:21,491 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.47 ms. Allocated memory is still 178.3 MB. Free memory was 159.4 MB in the beginning and 158.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:25:21,491 INFO L168 Benchmark]: Boogie Preprocessor took 12.60 ms. Allocated memory is still 178.3 MB. Free memory was 158.0 MB in the beginning and 156.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:25:21,491 INFO L168 Benchmark]: RCFGBuilder took 353.18 ms. Allocated memory is still 178.3 MB. Free memory was 156.7 MB in the beginning and 131.7 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2021-08-12 19:25:21,491 INFO L168 Benchmark]: TraceAbstraction took 598946.25 ms. Allocated memory was 178.3 MB in the beginning and 690.0 MB in the end (delta: 511.7 MB). Free memory was 131.2 MB in the beginning and 524.7 MB in the end (delta: -393.5 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. [2021-08-12 19:25:21,491 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 0.14 ms. Allocated memory is still 178.3 MB. Free memory was 160.9 MB in the beginning and 160.7 MB in the end (delta: 160.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.47 ms. Allocated memory is still 178.3 MB. Free memory was 159.4 MB in the beginning and 158.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.60 ms. Allocated memory is still 178.3 MB. Free memory was 158.0 MB in the beginning and 156.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 353.18 ms. Allocated memory is still 178.3 MB. Free memory was 156.7 MB in the beginning and 131.7 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 598946.25 ms. Allocated memory was 178.3 MB in the beginning and 690.0 MB in the end (delta: 511.7 MB). Free memory was 131.2 MB in the beginning and 524.7 MB in the end (delta: -393.5 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (242states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (231 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 598884.7ms, OverallIterations: 316, TraceHistogramMax: 1, EmptinessCheckTime: 161.0ms, AutomataDifference: 475826.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15336 SDtfs, 26705 SDslu, 47335 SDs, 0 SdLazy, 37024 SolverSat, 1577 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15398.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6455 GetRequests, 2939 SyntacticMatches, 136 SemanticMatches, 3380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 35054.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=311occurred in iteration=126, InterpolantAutomatonStates: 2343, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 56699.1ms AutomataMinimizationTime, 315 MinimizatonAttempts, 55821 StatesRemovedByMinimization, 313 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 897.2ms SsaConstructionTime, 1845.2ms SatisfiabilityAnalysisTime, 23164.1ms InterpolantComputationTime, 8700 NumberOfCodeBlocks, 8700 NumberOfCodeBlocksAsserted, 591 NumberOfCheckSat, 8219 ConstructedInterpolants, 0 QuantifiedInterpolants, 52449 SizeOfPredicates, 848 NumberOfNonLiveVariables, 11253 ConjunctsInSsa, 1433 ConjunctsInUnsatCore, 481 InterpolantComputations, 151 PerfectInterpolantSequences, 172/546 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