/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:26:19,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:26:19,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:26:19,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:26:19,842 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-Separate.epf [2021-05-22 02:26:19,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:26:19,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:26:19,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:26:19,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:26:19,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:26:19,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:26:19,878 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:26:19,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:26:19,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:26:19,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:26:19,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:26:19,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:26:19,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:26:19,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:26:19,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:26:19,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:26:19,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:26:19,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:26:19,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:26:19,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:26:19,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:26:19,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:26:19,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:26:19,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:26:19,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:26:19,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:26:19,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:26:19,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:26:19,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:26:19,882 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:26:19,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:26:19,882 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:26:19,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:26:20,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:26:20,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:26:20,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:26:20,200 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:26:20,201 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:26:20,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-4.wvr.bpl [2021-05-22 02:26:20,202 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-4.wvr.bpl' [2021-05-22 02:26:20,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:26:20,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:26:20,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:26:20,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:26:20,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:26:20,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,261 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:26:20,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:26:20,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:26:20,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:26:20,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... [2021-05-22 02:26:20,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:26:20,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:26:20,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:26:20,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:26:20,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:26:20,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:26:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:26:20,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:26:20,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:26:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:26:20,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:26:20,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:26:20,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:26:20,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:26:20,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:26:20,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:26:20,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:26:20,350 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-22 02:26:20,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-22 02:26:20,350 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-22 02:26:20,351 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:26:20,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:26:20,569 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:26:20,571 INFO L202 PluginConnector]: Adding new model ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:26:20 BoogieIcfgContainer [2021-05-22 02:26:20,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:26:20,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:26:20,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:26:20,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:26:20,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:20" (1/2) ... [2021-05-22 02:26:20,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10278914 and model type ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:26:20, skipping insertion in model container [2021-05-22 02:26:20,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:26:20" (2/2) ... [2021-05-22 02:26:20,577 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-4.wvr.bpl [2021-05-22 02:26:20,601 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:26:20,601 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:26:20,601 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:26:20,604 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:26:20,688 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-22 02:26:20,704 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:26:20,719 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:26:20,719 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:26:20,720 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:26:20,720 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:26:20,720 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:26:20,720 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:26:20,720 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:26:20,720 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:26:20,728 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 38 transitions, 108 flow [2021-05-22 02:26:20,860 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2078 states, 2076 states have (on average 3.352601156069364) internal successors, (6960), 2077 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 2078 states, 2076 states have (on average 3.352601156069364) internal successors, (6960), 2077 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:20,890 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:20,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:20,891 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:20,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2025062265, now seen corresponding path program 1 times [2021-05-22 02:26:20,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:20,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531906695] [2021-05-22 02:26:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:21,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:21,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531906695] [2021-05-22 02:26:21,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531906695] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:21,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:21,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:21,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551235260] [2021-05-22 02:26:21,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:21,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:21,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:21,162 INFO L87 Difference]: Start difference. First operand has 2078 states, 2076 states have (on average 3.352601156069364) internal successors, (6960), 2077 states have internal predecessors, (6960), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:21,372 INFO L93 Difference]: Finished difference Result 4667 states and 14949 transitions. [2021-05-22 02:26:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:21,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:21,422 INFO L225 Difference]: With dead ends: 4667 [2021-05-22 02:26:21,422 INFO L226 Difference]: Without dead ends: 4667 [2021-05-22 02:26:21,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-05-22 02:26:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 2700. [2021-05-22 02:26:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 3.277510188958874) internal successors, (8846), 2699 states have internal predecessors, (8846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 8846 transitions. [2021-05-22 02:26:21,618 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 8846 transitions. Word has length 32 [2021-05-22 02:26:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:21,619 INFO L482 AbstractCegarLoop]: Abstraction has 2700 states and 8846 transitions. [2021-05-22 02:26:21,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 8846 transitions. [2021-05-22 02:26:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:21,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:21,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:21,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:26:21,628 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:21,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1065960773, now seen corresponding path program 2 times [2021-05-22 02:26:21,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:21,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968153930] [2021-05-22 02:26:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:21,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:21,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968153930] [2021-05-22 02:26:21,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968153930] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:21,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:21,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:21,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565732327] [2021-05-22 02:26:21,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:21,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:21,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:21,730 INFO L87 Difference]: Start difference. First operand 2700 states and 8846 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:21,789 INFO L93 Difference]: Finished difference Result 3934 states and 12791 transitions. [2021-05-22 02:26:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:26:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:21,803 INFO L225 Difference]: With dead ends: 3934 [2021-05-22 02:26:21,803 INFO L226 Difference]: Without dead ends: 2423 [2021-05-22 02:26:21,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-05-22 02:26:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2423. [2021-05-22 02:26:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 3.1643270024772914) internal successors, (7664), 2422 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 7664 transitions. [2021-05-22 02:26:21,885 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 7664 transitions. Word has length 32 [2021-05-22 02:26:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:21,885 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 7664 transitions. [2021-05-22 02:26:21,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 7664 transitions. [2021-05-22 02:26:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:21,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:21,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:21,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:26:21,894 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:21,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:21,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2026635943, now seen corresponding path program 3 times [2021-05-22 02:26:21,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:21,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609819322] [2021-05-22 02:26:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:21,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:21,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609819322] [2021-05-22 02:26:21,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609819322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:21,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:21,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:21,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327621056] [2021-05-22 02:26:21,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:21,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:21,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:21,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:21,956 INFO L87 Difference]: Start difference. First operand 2423 states and 7664 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:22,150 INFO L93 Difference]: Finished difference Result 3808 states and 11495 transitions. [2021-05-22 02:26:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:22,172 INFO L225 Difference]: With dead ends: 3808 [2021-05-22 02:26:22,176 INFO L226 Difference]: Without dead ends: 3752 [2021-05-22 02:26:22,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-05-22 02:26:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 2380. [2021-05-22 02:26:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 3.051282051282051) internal successors, (7259), 2379 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 7259 transitions. [2021-05-22 02:26:22,256 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 7259 transitions. Word has length 32 [2021-05-22 02:26:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:22,256 INFO L482 AbstractCegarLoop]: Abstraction has 2380 states and 7259 transitions. [2021-05-22 02:26:22,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 7259 transitions. [2021-05-22 02:26:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:22,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:22,265 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:22,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:26:22,265 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1029490665, now seen corresponding path program 4 times [2021-05-22 02:26:22,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:22,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105630101] [2021-05-22 02:26:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:22,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:22,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105630101] [2021-05-22 02:26:22,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105630101] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:22,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:22,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:22,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79292038] [2021-05-22 02:26:22,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:22,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:22,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:22,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:22,356 INFO L87 Difference]: Start difference. First operand 2380 states and 7259 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:22,483 INFO L93 Difference]: Finished difference Result 4077 states and 12080 transitions. [2021-05-22 02:26:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:26:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:22,507 INFO L225 Difference]: With dead ends: 4077 [2021-05-22 02:26:22,507 INFO L226 Difference]: Without dead ends: 4041 [2021-05-22 02:26:22,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4041 states. [2021-05-22 02:26:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4041 to 2490. [2021-05-22 02:26:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 3.0168742466854157) internal successors, (7509), 2489 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 7509 transitions. [2021-05-22 02:26:22,586 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 7509 transitions. Word has length 32 [2021-05-22 02:26:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:22,586 INFO L482 AbstractCegarLoop]: Abstraction has 2490 states and 7509 transitions. [2021-05-22 02:26:22,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 7509 transitions. [2021-05-22 02:26:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:22,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:22,593 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:22,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:26:22,593 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1807429561, now seen corresponding path program 5 times [2021-05-22 02:26:22,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:22,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732674705] [2021-05-22 02:26:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:22,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:22,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732674705] [2021-05-22 02:26:22,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732674705] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:22,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:22,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:22,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676481371] [2021-05-22 02:26:22,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:22,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:22,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:22,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:22,651 INFO L87 Difference]: Start difference. First operand 2490 states and 7509 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:22,872 INFO L93 Difference]: Finished difference Result 4317 states and 12598 transitions. [2021-05-22 02:26:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:22,884 INFO L225 Difference]: With dead ends: 4317 [2021-05-22 02:26:22,885 INFO L226 Difference]: Without dead ends: 4233 [2021-05-22 02:26:22,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2021-05-22 02:26:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 2600. [2021-05-22 02:26:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.981916121585225) internal successors, (7750), 2599 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 7750 transitions. [2021-05-22 02:26:22,964 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 7750 transitions. Word has length 32 [2021-05-22 02:26:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:22,964 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 7750 transitions. [2021-05-22 02:26:22,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 7750 transitions. [2021-05-22 02:26:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:22,971 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:22,971 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:22,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:26:22,971 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:22,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash -18545143, now seen corresponding path program 6 times [2021-05-22 02:26:22,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:22,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964566811] [2021-05-22 02:26:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:23,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:23,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964566811] [2021-05-22 02:26:23,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964566811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:23,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:23,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:23,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511962142] [2021-05-22 02:26:23,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:23,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:23,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:23,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:23,028 INFO L87 Difference]: Start difference. First operand 2600 states and 7750 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:23,148 INFO L93 Difference]: Finished difference Result 4214 states and 12236 transitions. [2021-05-22 02:26:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:26:23,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:23,160 INFO L225 Difference]: With dead ends: 4214 [2021-05-22 02:26:23,161 INFO L226 Difference]: Without dead ends: 4134 [2021-05-22 02:26:23,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-05-22 02:26:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 2536. [2021-05-22 02:26:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2535 states have (on average 2.967258382642998) internal successors, (7522), 2535 states have internal predecessors, (7522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 7522 transitions. [2021-05-22 02:26:23,246 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 7522 transitions. Word has length 32 [2021-05-22 02:26:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:23,247 INFO L482 AbstractCegarLoop]: Abstraction has 2536 states and 7522 transitions. [2021-05-22 02:26:23,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 7522 transitions. [2021-05-22 02:26:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:23,254 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:23,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:23,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:26:23,255 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:23,255 INFO L82 PathProgramCache]: Analyzing trace with hash 634178151, now seen corresponding path program 7 times [2021-05-22 02:26:23,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:23,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460250196] [2021-05-22 02:26:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:23,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:23,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460250196] [2021-05-22 02:26:23,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460250196] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:23,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:23,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:23,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061835314] [2021-05-22 02:26:23,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:23,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:23,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:23,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:23,322 INFO L87 Difference]: Start difference. First operand 2536 states and 7522 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:23,495 INFO L93 Difference]: Finished difference Result 4317 states and 12421 transitions. [2021-05-22 02:26:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:23,507 INFO L225 Difference]: With dead ends: 4317 [2021-05-22 02:26:23,508 INFO L226 Difference]: Without dead ends: 4149 [2021-05-22 02:26:23,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-05-22 02:26:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 2547. [2021-05-22 02:26:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 2.9571877454831106) internal successors, (7529), 2546 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 7529 transitions. [2021-05-22 02:26:23,611 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 7529 transitions. Word has length 32 [2021-05-22 02:26:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:23,612 INFO L482 AbstractCegarLoop]: Abstraction has 2547 states and 7529 transitions. [2021-05-22 02:26:23,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 7529 transitions. [2021-05-22 02:26:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:23,619 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:23,619 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:23,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:26:23,619 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1676648229, now seen corresponding path program 8 times [2021-05-22 02:26:23,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:23,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792508309] [2021-05-22 02:26:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:23,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:23,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792508309] [2021-05-22 02:26:23,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792508309] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:23,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:23,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:23,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813814441] [2021-05-22 02:26:23,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:23,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:23,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:23,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:23,682 INFO L87 Difference]: Start difference. First operand 2547 states and 7529 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:23,783 INFO L93 Difference]: Finished difference Result 3325 states and 9273 transitions. [2021-05-22 02:26:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:23,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:23,792 INFO L225 Difference]: With dead ends: 3325 [2021-05-22 02:26:23,792 INFO L226 Difference]: Without dead ends: 3249 [2021-05-22 02:26:23,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2021-05-22 02:26:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2124. [2021-05-22 02:26:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.7960433349034384) internal successors, (5936), 2123 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5936 transitions. [2021-05-22 02:26:23,850 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5936 transitions. Word has length 32 [2021-05-22 02:26:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:23,851 INFO L482 AbstractCegarLoop]: Abstraction has 2124 states and 5936 transitions. [2021-05-22 02:26:23,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5936 transitions. [2021-05-22 02:26:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:23,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:23,856 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:23,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:26:23,857 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:23,857 INFO L82 PathProgramCache]: Analyzing trace with hash -448578393, now seen corresponding path program 9 times [2021-05-22 02:26:23,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:23,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898854176] [2021-05-22 02:26:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:23,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:23,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898854176] [2021-05-22 02:26:23,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898854176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:23,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:23,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:23,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821878612] [2021-05-22 02:26:23,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:23,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:23,929 INFO L87 Difference]: Start difference. First operand 2124 states and 5936 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:24,105 INFO L93 Difference]: Finished difference Result 2967 states and 7732 transitions. [2021-05-22 02:26:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:24,112 INFO L225 Difference]: With dead ends: 2967 [2021-05-22 02:26:24,112 INFO L226 Difference]: Without dead ends: 2753 [2021-05-22 02:26:24,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-05-22 02:26:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1853. [2021-05-22 02:26:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 2.6906047516198703) internal successors, (4983), 1852 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 4983 transitions. [2021-05-22 02:26:24,159 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 4983 transitions. Word has length 32 [2021-05-22 02:26:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:24,159 INFO L482 AbstractCegarLoop]: Abstraction has 1853 states and 4983 transitions. [2021-05-22 02:26:24,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 4983 transitions. [2021-05-22 02:26:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:24,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:24,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:24,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:26:24,164 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:24,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1288197813, now seen corresponding path program 10 times [2021-05-22 02:26:24,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:24,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282669545] [2021-05-22 02:26:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:24,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:24,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282669545] [2021-05-22 02:26:24,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282669545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:24,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:24,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:24,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137861122] [2021-05-22 02:26:24,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:24,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:24,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:24,205 INFO L87 Difference]: Start difference. First operand 1853 states and 4983 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:24,347 INFO L93 Difference]: Finished difference Result 3075 states and 8070 transitions. [2021-05-22 02:26:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:26:24,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:24,360 INFO L225 Difference]: With dead ends: 3075 [2021-05-22 02:26:24,360 INFO L226 Difference]: Without dead ends: 3039 [2021-05-22 02:26:24,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-05-22 02:26:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1770. [2021-05-22 02:26:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 2.6602600339174676) internal successors, (4706), 1769 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 4706 transitions. [2021-05-22 02:26:24,402 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 4706 transitions. Word has length 32 [2021-05-22 02:26:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:24,402 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 4706 transitions. [2021-05-22 02:26:24,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 4706 transitions. [2021-05-22 02:26:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:24,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:24,406 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:24,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:26:24,406 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash 169849257, now seen corresponding path program 11 times [2021-05-22 02:26:24,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:24,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730408079] [2021-05-22 02:26:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:24,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:24,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730408079] [2021-05-22 02:26:24,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730408079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:24,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:24,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:24,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083463846] [2021-05-22 02:26:24,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:24,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:24,450 INFO L87 Difference]: Start difference. First operand 1770 states and 4706 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:24,621 INFO L93 Difference]: Finished difference Result 2951 states and 7706 transitions. [2021-05-22 02:26:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:24,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:24,627 INFO L225 Difference]: With dead ends: 2951 [2021-05-22 02:26:24,628 INFO L226 Difference]: Without dead ends: 2867 [2021-05-22 02:26:24,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-05-22 02:26:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 1710. [2021-05-22 02:26:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.641895845523698) internal successors, (4515), 1709 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 4515 transitions. [2021-05-22 02:26:24,665 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 4515 transitions. Word has length 32 [2021-05-22 02:26:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:24,665 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 4515 transitions. [2021-05-22 02:26:24,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 4515 transitions. [2021-05-22 02:26:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:24,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:24,668 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:24,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:26:24,668 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1064623707, now seen corresponding path program 12 times [2021-05-22 02:26:24,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:24,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361034036] [2021-05-22 02:26:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:24,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:24,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361034036] [2021-05-22 02:26:24,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361034036] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:24,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:24,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:26:24,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473581212] [2021-05-22 02:26:24,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:26:24,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:24,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:26:24,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:24,724 INFO L87 Difference]: Start difference. First operand 1710 states and 4515 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:24,958 INFO L93 Difference]: Finished difference Result 2931 states and 7585 transitions. [2021-05-22 02:26:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:26:24,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:24,964 INFO L225 Difference]: With dead ends: 2931 [2021-05-22 02:26:24,964 INFO L226 Difference]: Without dead ends: 2856 [2021-05-22 02:26:24,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:26:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-05-22 02:26:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 1711. [2021-05-22 02:26:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 2.6187134502923977) internal successors, (4478), 1710 states have internal predecessors, (4478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 4478 transitions. [2021-05-22 02:26:24,999 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 4478 transitions. Word has length 32 [2021-05-22 02:26:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:24,999 INFO L482 AbstractCegarLoop]: Abstraction has 1711 states and 4478 transitions. [2021-05-22 02:26:24,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 4478 transitions. [2021-05-22 02:26:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:25,002 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:25,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:25,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:26:25,003 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:25,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1026776939, now seen corresponding path program 13 times [2021-05-22 02:26:25,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:25,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567497586] [2021-05-22 02:26:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:25,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:25,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567497586] [2021-05-22 02:26:25,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567497586] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:25,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:25,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:25,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975872391] [2021-05-22 02:26:25,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:25,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:25,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:25,040 INFO L87 Difference]: Start difference. First operand 1711 states and 4478 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:25,169 INFO L93 Difference]: Finished difference Result 2936 states and 7562 transitions. [2021-05-22 02:26:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:26:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:25,176 INFO L225 Difference]: With dead ends: 2936 [2021-05-22 02:26:25,176 INFO L226 Difference]: Without dead ends: 2888 [2021-05-22 02:26:25,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2021-05-22 02:26:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 1687. [2021-05-22 02:26:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.601423487544484) internal successors, (4386), 1686 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4386 transitions. [2021-05-22 02:26:25,214 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4386 transitions. Word has length 32 [2021-05-22 02:26:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:25,214 INFO L482 AbstractCegarLoop]: Abstraction has 1687 states and 4386 transitions. [2021-05-22 02:26:25,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4386 transitions. [2021-05-22 02:26:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:25,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:25,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:25,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:26:25,217 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:25,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1679500233, now seen corresponding path program 14 times [2021-05-22 02:26:25,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:25,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151765540] [2021-05-22 02:26:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:25,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:25,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151765540] [2021-05-22 02:26:25,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151765540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:25,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:25,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:25,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499143103] [2021-05-22 02:26:25,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:25,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:25,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:25,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:25,265 INFO L87 Difference]: Start difference. First operand 1687 states and 4386 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:25,434 INFO L93 Difference]: Finished difference Result 2900 states and 7440 transitions. [2021-05-22 02:26:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:25,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:25,444 INFO L225 Difference]: With dead ends: 2900 [2021-05-22 02:26:25,444 INFO L226 Difference]: Without dead ends: 2732 [2021-05-22 02:26:25,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-05-22 02:26:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1615. [2021-05-22 02:26:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 2.587360594795539) internal successors, (4176), 1614 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 4176 transitions. [2021-05-22 02:26:25,478 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 4176 transitions. Word has length 32 [2021-05-22 02:26:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:25,478 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 4176 transitions. [2021-05-22 02:26:25,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 4176 transitions. [2021-05-22 02:26:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:25,481 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:25,481 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:25,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:26:25,482 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:25,482 INFO L82 PathProgramCache]: Analyzing trace with hash -79098939, now seen corresponding path program 15 times [2021-05-22 02:26:25,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:25,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43624903] [2021-05-22 02:26:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:25,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:25,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43624903] [2021-05-22 02:26:25,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43624903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:25,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:25,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:26:25,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529589432] [2021-05-22 02:26:25,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:26:25,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:25,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:26:25,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:25,523 INFO L87 Difference]: Start difference. First operand 1615 states and 4176 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:25,739 INFO L93 Difference]: Finished difference Result 2846 states and 7269 transitions. [2021-05-22 02:26:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:26:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:25,744 INFO L225 Difference]: With dead ends: 2846 [2021-05-22 02:26:25,744 INFO L226 Difference]: Without dead ends: 2642 [2021-05-22 02:26:25,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:26:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-05-22 02:26:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1525. [2021-05-22 02:26:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.5990813648293964) internal successors, (3961), 1524 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 3961 transitions. [2021-05-22 02:26:25,776 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 3961 transitions. Word has length 32 [2021-05-22 02:26:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:25,776 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 3961 transitions. [2021-05-22 02:26:25,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 3961 transitions. [2021-05-22 02:26:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:25,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:25,779 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:25,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:26:25,779 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1280334617, now seen corresponding path program 16 times [2021-05-22 02:26:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:25,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656761889] [2021-05-22 02:26:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:25,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:25,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656761889] [2021-05-22 02:26:25,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656761889] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:25,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:25,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:25,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921232501] [2021-05-22 02:26:25,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:25,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:25,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:25,834 INFO L87 Difference]: Start difference. First operand 1525 states and 3961 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:25,986 INFO L93 Difference]: Finished difference Result 2648 states and 6780 transitions. [2021-05-22 02:26:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:25,993 INFO L225 Difference]: With dead ends: 2648 [2021-05-22 02:26:25,993 INFO L226 Difference]: Without dead ends: 2576 [2021-05-22 02:26:25,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-05-22 02:26:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1464. [2021-05-22 02:26:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.5598086124401913) internal successors, (3745), 1463 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3745 transitions. [2021-05-22 02:26:26,021 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3745 transitions. Word has length 32 [2021-05-22 02:26:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:26,021 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3745 transitions. [2021-05-22 02:26:26,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3745 transitions. [2021-05-22 02:26:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:26,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:26,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:26,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:26:26,024 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:26,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:26,024 INFO L82 PathProgramCache]: Analyzing trace with hash -864006587, now seen corresponding path program 17 times [2021-05-22 02:26:26,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:26,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695193460] [2021-05-22 02:26:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:26,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:26,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695193460] [2021-05-22 02:26:26,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695193460] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:26,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:26,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:26:26,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076707986] [2021-05-22 02:26:26,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:26:26,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:26,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:26:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:26,088 INFO L87 Difference]: Start difference. First operand 1464 states and 3745 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:26,291 INFO L93 Difference]: Finished difference Result 2588 states and 6572 transitions. [2021-05-22 02:26:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:26:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:26,296 INFO L225 Difference]: With dead ends: 2588 [2021-05-22 02:26:26,296 INFO L226 Difference]: Without dead ends: 2505 [2021-05-22 02:26:26,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:26:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-05-22 02:26:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 1418. [2021-05-22 02:26:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 2.5772759350741) internal successors, (3652), 1417 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 3652 transitions. [2021-05-22 02:26:26,325 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 3652 transitions. Word has length 32 [2021-05-22 02:26:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:26,325 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 3652 transitions. [2021-05-22 02:26:26,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 3652 transitions. [2021-05-22 02:26:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:26,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:26,328 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:26,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 02:26:26,328 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1734682419, now seen corresponding path program 18 times [2021-05-22 02:26:26,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:26,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086206351] [2021-05-22 02:26:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:26,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:26,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086206351] [2021-05-22 02:26:26,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086206351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:26,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:26,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:26,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829776395] [2021-05-22 02:26:26,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:26,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:26,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:26,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:26,360 INFO L87 Difference]: Start difference. First operand 1418 states and 3652 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:26,425 INFO L93 Difference]: Finished difference Result 1501 states and 3704 transitions. [2021-05-22 02:26:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:26,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:26,427 INFO L225 Difference]: With dead ends: 1501 [2021-05-22 02:26:26,427 INFO L226 Difference]: Without dead ends: 1329 [2021-05-22 02:26:26,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-05-22 02:26:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 754. [2021-05-22 02:26:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.4674634794156707) internal successors, (1858), 753 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1858 transitions. [2021-05-22 02:26:26,441 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1858 transitions. Word has length 32 [2021-05-22 02:26:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:26,441 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 1858 transitions. [2021-05-22 02:26:26,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1858 transitions. [2021-05-22 02:26:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:26,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:26,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:26,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:26:26,443 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:26,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1438292239, now seen corresponding path program 19 times [2021-05-22 02:26:26,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:26,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907215322] [2021-05-22 02:26:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:26,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:26,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907215322] [2021-05-22 02:26:26,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907215322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:26,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:26,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:26,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108715048] [2021-05-22 02:26:26,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:26,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:26,474 INFO L87 Difference]: Start difference. First operand 754 states and 1858 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:26,587 INFO L93 Difference]: Finished difference Result 478 states and 1000 transitions. [2021-05-22 02:26:26,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:26,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:26,588 INFO L225 Difference]: With dead ends: 478 [2021-05-22 02:26:26,588 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:26:26,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:26:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 162. [2021-05-22 02:26:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1677018633540373) internal successors, (349), 161 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 349 transitions. [2021-05-22 02:26:26,593 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 349 transitions. Word has length 32 [2021-05-22 02:26:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:26,593 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 349 transitions. [2021-05-22 02:26:26,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 349 transitions. [2021-05-22 02:26:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:26:26,594 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:26,594 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:26,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:26:26,594 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:26,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2002098131, now seen corresponding path program 20 times [2021-05-22 02:26:26,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:26,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927199067] [2021-05-22 02:26:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:26,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:26,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927199067] [2021-05-22 02:26:26,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927199067] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:26,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:26,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:26:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473388065] [2021-05-22 02:26:26,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:26:26,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:26,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:26:26,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:26,653 INFO L87 Difference]: Start difference. First operand 162 states and 349 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:26,753 INFO L93 Difference]: Finished difference Result 105 states and 189 transitions. [2021-05-22 02:26:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:26:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:26:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:26,754 INFO L225 Difference]: With dead ends: 105 [2021-05-22 02:26:26,754 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 02:26:26,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:26:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 02:26:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 02:26:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 02:26:26,755 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-22 02:26:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:26,755 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 02:26:26,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 02:26:26,755 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:26:26,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:26:26,756 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 02:26:26,757 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-22 02:26:26,758 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:26:26,758 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:26:26,758 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:26:26,758 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:26:26,758 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:26:26,758 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:26:26,758 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:26:26,758 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:26:26,761 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 38 transitions, 108 flow [2021-05-22 02:26:26,816 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2078 states, 2076 states have (on average 3.352601156069364) internal successors, (6960), 2077 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 2078 states, 2076 states have (on average 3.352601156069364) internal successors, (6960), 2077 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,824 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:26:26,824 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 02:26:26,824 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:26:26,826 INFO L202 PluginConnector]: Adding new model ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:26:26 BasicIcfg [2021-05-22 02:26:26,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:26:26,828 INFO L168 Benchmark]: Toolchain (without parser) took 6591.62 ms. Allocated memory was 331.4 MB in the beginning and 480.2 MB in the end (delta: 148.9 MB). Free memory was 310.0 MB in the beginning and 437.0 MB in the end (delta: -126.9 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.0 GB. [2021-05-22 02:26:26,828 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 331.4 MB. Free memory is still 311.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:26:26,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.57 ms. Allocated memory is still 331.4 MB. Free memory was 310.0 MB in the beginning and 308.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:26:26,828 INFO L168 Benchmark]: Boogie Preprocessor took 13.42 ms. Allocated memory is still 331.4 MB. Free memory was 308.5 MB in the beginning and 307.5 MB in the end (delta: 951.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:26:26,828 INFO L168 Benchmark]: RCFGBuilder took 288.25 ms. Allocated memory is still 331.4 MB. Free memory was 307.5 MB in the beginning and 293.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:26:26,829 INFO L168 Benchmark]: TraceAbstraction took 6254.10 ms. Allocated memory was 331.4 MB in the beginning and 480.2 MB in the end (delta: 148.9 MB). Free memory was 293.2 MB in the beginning and 437.0 MB in the end (delta: -143.7 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:26:26,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 331.4 MB. Free memory is still 311.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.57 ms. Allocated memory is still 331.4 MB. Free memory was 310.0 MB in the beginning and 308.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.42 ms. Allocated memory is still 331.4 MB. Free memory was 308.5 MB in the beginning and 307.5 MB in the end (delta: 951.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 288.25 ms. Allocated memory is still 331.4 MB. Free memory was 307.5 MB in the beginning and 293.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 6254.10 ms. Allocated memory was 331.4 MB in the beginning and 480.2 MB in the end (delta: 148.9 MB). Free memory was 293.2 MB in the beginning and 437.0 MB in the end (delta: -143.7 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 80]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 68 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6038.5ms, OverallIterations: 20, TraceHistogramMax: 1, EmptinessCheckTime: 112.2ms, AutomataDifference: 3352.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 140.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1031 SDtfs, 1435 SDslu, 3418 SDs, 0 SdLazy, 3417 SolverSat, 547 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1715.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 804.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2700occurred in iteration=1, InterpolantAutomatonStates: 169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1079.7ms AutomataMinimizationTime, 20 MinimizatonAttempts, 21600 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.0ms SsaConstructionTime, 160.4ms SatisfiabilityAnalysisTime, 958.8ms InterpolantComputationTime, 640 NumberOfCodeBlocks, 640 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 620 ConstructedInterpolants, 0 QuantifiedInterpolants, 1815 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 9 procedures, 68 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 65.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 7.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 57.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2078occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...