/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/fork_loop_unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:06:33,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:06:33,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:06:33,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:06:33,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 13:06:33,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 13:06:33,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 13:06:33,617 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 [2021-06-05 13:06:33,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:06:33,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:06:33,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:06:33,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:06:33,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:06:33,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:06:33,647 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:06:33,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:06:33,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:06:33,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:06:33,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:06:33,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:06:33,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:06:33,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:06:33,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:06:33,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:06:33,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:06:33,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:06:33,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:06:33,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:06:33,650 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:06:33,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:06:33,650 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:06:33,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:06:33,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:06:33,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:06:33,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:06:33,906 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:06:33,907 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:06:33,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-06-05 13:06:33,908 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-06-05 13:06:34,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:06:34,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:06:34,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:06:34,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:06:34,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:06:34,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:06:34,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:06:34,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:06:34,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:06:34,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/1) ... [2021-06-05 13:06:34,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:06:34,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:06:34,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:06:34,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:06:34,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (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 [2021-06-05 13:06:34,300 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:06:34,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:06:34,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:06:34,301 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-05 13:06:34,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-05 13:06:34,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-05 13:06:34,302 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:06:34,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:06:34,392 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-05 13:06:34,393 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:06:34 BoogieIcfgContainer [2021-06-05 13:06:34,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:06:34,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:06:34,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:06:34,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:06:34,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:34" (1/2) ... [2021-06-05 13:06:34,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb270fa and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:06:34, skipping insertion in model container [2021-06-05 13:06:34,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:06:34" (2/2) ... [2021-06-05 13:06:34,398 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-06-05 13:06:34,404 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:06:34,405 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:06:34,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:06:34,406 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:06:34,424 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,425 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,425 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,425 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,429 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:06:34,443 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 13:06:34,455 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:34,455 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:34,455 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:34,455 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:34,455 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:34,455 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:34,455 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:34,455 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:06:34,460 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 25 flow [2021-06-05 13:06:34,467 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 13:06:34,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:34,472 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 13:06:34,472 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash 43134229, now seen corresponding path program 1 times [2021-06-05 13:06:34,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:34,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046887280] [2021-06-05 13:06:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:34,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046887280] [2021-06-05 13:06:34,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046887280] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:34,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:34,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:34,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072675713] [2021-06-05 13:06:34,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:06:34,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:06:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:06:34,626 INFO L87 Difference]: Start difference. First operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 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, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:34,676 INFO L93 Difference]: Finished difference Result 20 states and 28 transitions. [2021-06-05 13:06:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:34,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 13:06:34,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:34,680 INFO L225 Difference]: With dead ends: 20 [2021-06-05 13:06:34,680 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:06:34,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:06:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:06:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:06:34,693 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) [2021-06-05 13:06:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:06:34,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2021-06-05 13:06:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:34,693 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:06:34,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:06:34,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:06:34,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:06:34,694 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:06:34,695 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:06:34,697 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:34,697 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:34,697 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:34,697 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:34,697 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:34,697 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:34,697 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:34,697 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:06:34,698 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 25 flow [2021-06-05 13:06:34,699 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 13:06:34,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:34,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 13:06:34,700 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:06:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-06-05 13:06:34,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:34,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368417648] [2021-06-05 13:06:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:34,704 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:34,706 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:34,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:06:34,715 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:06:34,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:06:34,715 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:06:34,715 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:06:34,715 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-05 13:06:34,718 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,718 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,719 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,719 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,719 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,719 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,719 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,719 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:34,722 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:06:34,722 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:06:34,724 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:34,724 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:34,724 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:34,724 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:34,724 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:34,724 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:34,724 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:34,724 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:06:34,725 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-06-05 13:06:34,732 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 13:06:34,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:34,733 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 13:06:34,733 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-06-05 13:06:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:34,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274076461] [2021-06-05 13:06:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:34,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:34,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274076461] [2021-06-05 13:06:34,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274076461] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:34,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:34,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:34,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530787082] [2021-06-05 13:06:34,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:06:34,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:06:34,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:06:34,779 INFO L87 Difference]: Start difference. First operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 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, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:34,825 INFO L93 Difference]: Finished difference Result 112 states and 249 transitions. [2021-06-05 13:06:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 13:06:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:34,828 INFO L225 Difference]: With dead ends: 112 [2021-06-05 13:06:34,829 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 13:06:34,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:06:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 13:06:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-06-05 13:06:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 2.3176470588235296) internal successors, (197), 90 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2021-06-05 13:06:34,844 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 5 [2021-06-05 13:06:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:34,845 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2021-06-05 13:06:34,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2021-06-05 13:06:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:06:34,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:34,845 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:34,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:06:34,846 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash -622629740, now seen corresponding path program 1 times [2021-06-05 13:06:34,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:34,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311393437] [2021-06-05 13:06:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:34,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:34,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311393437] [2021-06-05 13:06:34,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311393437] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:34,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:34,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:06:34,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932142340] [2021-06-05 13:06:34,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:34,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:34,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:34,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:34,883 INFO L87 Difference]: Start difference. First operand 91 states and 197 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:34,973 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2021-06-05 13:06:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:06:34,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 13:06:34,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:34,976 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:06:34,976 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:06:34,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:06:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:06:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-06-05 13:06:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 2.2962962962962963) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-06-05 13:06:34,990 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 7 [2021-06-05 13:06:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:34,990 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-06-05 13:06:34,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-06-05 13:06:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:34,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:34,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:34,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:06:34,991 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:34,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2121944893, now seen corresponding path program 1 times [2021-06-05 13:06:34,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:34,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825110751] [2021-06-05 13:06:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:35,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:35,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825110751] [2021-06-05 13:06:35,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825110751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:06:35,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68058852] [2021-06-05 13:06:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:06:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:35,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:06:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:06:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:35,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68058852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:06:35,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:06:35,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:06:35,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478511538] [2021-06-05 13:06:35,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:06:35,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:06:35,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:35,197 INFO L87 Difference]: Start difference. First operand 87 states and 186 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:35,236 INFO L93 Difference]: Finished difference Result 71 states and 146 transitions. [2021-06-05 13:06:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:06:35,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:35,239 INFO L225 Difference]: With dead ends: 71 [2021-06-05 13:06:35,239 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 13:06:35,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:06:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 13:06:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-06-05 13:06:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 110 transitions. [2021-06-05 13:06:35,253 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 110 transitions. Word has length 8 [2021-06-05 13:06:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:35,253 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 110 transitions. [2021-06-05 13:06:35,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 110 transitions. [2021-06-05 13:06:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:35,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:35,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:35,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:06:35,471 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2121944889, now seen corresponding path program 1 times [2021-06-05 13:06:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:35,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111476032] [2021-06-05 13:06:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:35,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:35,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111476032] [2021-06-05 13:06:35,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111476032] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:35,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:35,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:06:35,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134024454] [2021-06-05 13:06:35,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:35,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:35,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:35,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:35,523 INFO L87 Difference]: Start difference. First operand 55 states and 110 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:35,610 INFO L93 Difference]: Finished difference Result 133 states and 261 transitions. [2021-06-05 13:06:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:06:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:35,612 INFO L225 Difference]: With dead ends: 133 [2021-06-05 13:06:35,612 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 13:06:35,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:06:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 13:06:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-06-05 13:06:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 2.056603773584906) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-06-05 13:06:35,626 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 8 [2021-06-05 13:06:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:35,626 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-06-05 13:06:35,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-06-05 13:06:35,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:35,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:35,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:35,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:06:35,627 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:35,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:35,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2121656589, now seen corresponding path program 2 times [2021-06-05 13:06:35,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:35,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731057626] [2021-06-05 13:06:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:35,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:35,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731057626] [2021-06-05 13:06:35,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731057626] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:35,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:35,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:35,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367313001] [2021-06-05 13:06:35,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:06:35,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:06:35,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:06:35,661 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:35,761 INFO L93 Difference]: Finished difference Result 100 states and 193 transitions. [2021-06-05 13:06:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:06:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:35,761 INFO L225 Difference]: With dead ends: 100 [2021-06-05 13:06:35,761 INFO L226 Difference]: Without dead ends: 46 [2021-06-05 13:06:35,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:06:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-06-05 13:06:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-06-05 13:06:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2021-06-05 13:06:35,763 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 8 [2021-06-05 13:06:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:35,763 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2021-06-05 13:06:35,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2021-06-05 13:06:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:35,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:35,764 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:35,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:06:35,764 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2120157429, now seen corresponding path program 3 times [2021-06-05 13:06:35,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:35,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652417096] [2021-06-05 13:06:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:35,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:35,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652417096] [2021-06-05 13:06:35,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652417096] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:35,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:35,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:06:35,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809678057] [2021-06-05 13:06:35,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:35,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:35,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:35,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:35,792 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:35,829 INFO L93 Difference]: Finished difference Result 43 states and 72 transitions. [2021-06-05 13:06:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:06:35,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:35,830 INFO L225 Difference]: With dead ends: 43 [2021-06-05 13:06:35,830 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:06:35,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:06:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:06:35,830 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) [2021-06-05 13:06:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:06:35,831 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-06-05 13:06:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:35,831 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:06:35,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:06:35,831 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:06:35,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:06:35,831 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:06:35,831 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:06:35,832 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:35,832 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:35,832 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:35,832 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:35,832 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:35,832 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:35,832 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:35,832 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:06:35,833 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-06-05 13:06:35,835 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:06:35,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:35,836 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-06-05 13:06:35,836 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:06:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash -622629923, now seen corresponding path program 1 times [2021-06-05 13:06:35,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:35,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388151048] [2021-06-05 13:06:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:35,840 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:35,842 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:35,843 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:06:35,843 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:06:35,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:06:35,843 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:06:35,843 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:06:35,843 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-05 13:06:35,845 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,845 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:35,849 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:06:35,849 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 13:06:35,849 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:35,849 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:35,849 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:35,849 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:35,849 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:35,849 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:35,849 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:35,849 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:06:35,850 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 61 flow [2021-06-05 13:06:35,868 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 13:06:35,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:35,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 13:06:35,870 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:35,870 INFO L82 PathProgramCache]: Analyzing trace with hash 76542848, now seen corresponding path program 1 times [2021-06-05 13:06:35,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:35,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183247435] [2021-06-05 13:06:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:35,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:35,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183247435] [2021-06-05 13:06:35,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183247435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:35,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:35,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:35,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182349679] [2021-06-05 13:06:35,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:06:35,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:06:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:06:35,892 INFO L87 Difference]: Start difference. First operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 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, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:35,939 INFO L93 Difference]: Finished difference Result 584 states and 1771 transitions. [2021-06-05 13:06:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 13:06:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:35,942 INFO L225 Difference]: With dead ends: 584 [2021-06-05 13:06:35,942 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 13:06:35,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:06:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 13:06:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-06-05 13:06:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 526 states have (on average 3.1007604562737643) internal successors, (1631), 542 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1631 transitions. [2021-06-05 13:06:35,958 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1631 transitions. Word has length 5 [2021-06-05 13:06:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:35,958 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1631 transitions. [2021-06-05 13:06:35,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1631 transitions. [2021-06-05 13:06:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:06:35,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:35,959 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:35,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:06:35,959 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash 542941744, now seen corresponding path program 1 times [2021-06-05 13:06:35,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:35,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42037442] [2021-06-05 13:06:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:35,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:35,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42037442] [2021-06-05 13:06:35,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42037442] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:35,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:35,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:06:35,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249834048] [2021-06-05 13:06:35,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:35,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:35,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:35,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:35,985 INFO L87 Difference]: Start difference. First operand 543 states and 1631 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:36,102 INFO L93 Difference]: Finished difference Result 1140 states and 3452 transitions. [2021-06-05 13:06:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:06:36,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 13:06:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:36,108 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 13:06:36,108 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 13:06:36,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:06:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 13:06:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 536. [2021-06-05 13:06:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 519 states have (on average 3.096339113680154) internal successors, (1607), 535 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1607 transitions. [2021-06-05 13:06:36,128 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1607 transitions. Word has length 7 [2021-06-05 13:06:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:36,128 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1607 transitions. [2021-06-05 13:06:36,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1607 transitions. [2021-06-05 13:06:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:36,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:36,129 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:36,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 13:06:36,129 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:36,129 INFO L82 PathProgramCache]: Analyzing trace with hash -339906921, now seen corresponding path program 1 times [2021-06-05 13:06:36,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:36,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056421402] [2021-06-05 13:06:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:36,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:36,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056421402] [2021-06-05 13:06:36,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056421402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:06:36,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030535449] [2021-06-05 13:06:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:06:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:06:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:06:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:36,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030535449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:06:36,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:06:36,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:06:36,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202733249] [2021-06-05 13:06:36,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:06:36,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:06:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:36,237 INFO L87 Difference]: Start difference. First operand 536 states and 1607 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:36,315 INFO L93 Difference]: Finished difference Result 588 states and 1710 transitions. [2021-06-05 13:06:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:06:36,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:36,318 INFO L225 Difference]: With dead ends: 588 [2021-06-05 13:06:36,318 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 13:06:36,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:06:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 13:06:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 488. [2021-06-05 13:06:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 473 states have (on average 3.0697674418604652) internal successors, (1452), 487 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1452 transitions. [2021-06-05 13:06:36,332 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1452 transitions. Word has length 8 [2021-06-05 13:06:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:36,333 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1452 transitions. [2021-06-05 13:06:36,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1452 transitions. [2021-06-05 13:06:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:36,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:36,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:36,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 13:06:36,553 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:36,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:36,554 INFO L82 PathProgramCache]: Analyzing trace with hash -339906925, now seen corresponding path program 1 times [2021-06-05 13:06:36,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:36,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634622278] [2021-06-05 13:06:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:36,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:36,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634622278] [2021-06-05 13:06:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634622278] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:36,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:36,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:06:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063693115] [2021-06-05 13:06:36,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:36,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:36,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:36,592 INFO L87 Difference]: Start difference. First operand 488 states and 1452 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:36,720 INFO L93 Difference]: Finished difference Result 1437 states and 4277 transitions. [2021-06-05 13:06:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:06:36,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:36,727 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 13:06:36,727 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 13:06:36,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:06:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 13:06:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 527. [2021-06-05 13:06:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 512 states have (on average 3.068359375) internal successors, (1571), 526 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1571 transitions. [2021-06-05 13:06:36,749 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1571 transitions. Word has length 8 [2021-06-05 13:06:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:36,750 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1571 transitions. [2021-06-05 13:06:36,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1571 transitions. [2021-06-05 13:06:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:36,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:36,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:36,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 13:06:36,751 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash -348844225, now seen corresponding path program 2 times [2021-06-05 13:06:36,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:36,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817085310] [2021-06-05 13:06:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:36,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:36,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817085310] [2021-06-05 13:06:36,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817085310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:36,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:36,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:06:36,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125189973] [2021-06-05 13:06:36,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:36,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:36,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:36,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:36,800 INFO L87 Difference]: Start difference. First operand 527 states and 1571 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:36,931 INFO L93 Difference]: Finished difference Result 1276 states and 3824 transitions. [2021-06-05 13:06:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:06:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:36,936 INFO L225 Difference]: With dead ends: 1276 [2021-06-05 13:06:36,936 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 13:06:36,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:06:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 13:06:36,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 524. [2021-06-05 13:06:36,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 509 states have (on average 3.076620825147348) internal successors, (1566), 523 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1566 transitions. [2021-06-05 13:06:36,953 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1566 transitions. Word has length 8 [2021-06-05 13:06:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:36,953 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1566 transitions. [2021-06-05 13:06:36,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1566 transitions. [2021-06-05 13:06:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:36,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:36,953 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:36,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 13:06:36,954 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:36,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:36,954 INFO L82 PathProgramCache]: Analyzing trace with hash -348671245, now seen corresponding path program 3 times [2021-06-05 13:06:36,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:36,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089931724] [2021-06-05 13:06:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:36,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:36,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089931724] [2021-06-05 13:06:36,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089931724] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:36,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:36,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:36,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231932084] [2021-06-05 13:06:36,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:06:36,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:36,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:06:36,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:06:36,982 INFO L87 Difference]: Start difference. First operand 524 states and 1566 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:37,119 INFO L93 Difference]: Finished difference Result 1091 states and 3256 transitions. [2021-06-05 13:06:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:06:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:37,123 INFO L225 Difference]: With dead ends: 1091 [2021-06-05 13:06:37,123 INFO L226 Difference]: Without dead ends: 1076 [2021-06-05 13:06:37,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:06:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-06-05 13:06:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 443. [2021-06-05 13:06:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 429 states have (on average 3.0606060606060606) internal successors, (1313), 442 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1313 transitions. [2021-06-05 13:06:37,137 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1313 transitions. Word has length 8 [2021-06-05 13:06:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:37,137 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1313 transitions. [2021-06-05 13:06:37,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1313 transitions. [2021-06-05 13:06:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:06:37,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:37,138 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:37,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 13:06:37,138 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2075805857, now seen corresponding path program 1 times [2021-06-05 13:06:37,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:37,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237238553] [2021-06-05 13:06:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:37,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:37,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237238553] [2021-06-05 13:06:37,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237238553] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:37,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:37,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:37,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354639680] [2021-06-05 13:06:37,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:06:37,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:06:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:06:37,166 INFO L87 Difference]: Start difference. First operand 443 states and 1313 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:37,281 INFO L93 Difference]: Finished difference Result 847 states and 2509 transitions. [2021-06-05 13:06:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:06:37,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 13:06:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:37,285 INFO L225 Difference]: With dead ends: 847 [2021-06-05 13:06:37,285 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 13:06:37,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:06:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 13:06:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 439. [2021-06-05 13:06:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 425 states have (on average 3.0541176470588236) internal successors, (1298), 438 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1298 transitions. [2021-06-05 13:06:37,302 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1298 transitions. Word has length 9 [2021-06-05 13:06:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:37,302 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1298 transitions. [2021-06-05 13:06:37,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1298 transitions. [2021-06-05 13:06:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:06:37,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:37,303 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:37,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 13:06:37,303 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:37,303 INFO L82 PathProgramCache]: Analyzing trace with hash -233207740, now seen corresponding path program 1 times [2021-06-05 13:06:37,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:37,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370050626] [2021-06-05 13:06:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:37,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:37,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370050626] [2021-06-05 13:06:37,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370050626] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:37,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:37,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:37,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487897192] [2021-06-05 13:06:37,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:06:37,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:37,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:06:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:06:37,346 INFO L87 Difference]: Start difference. First operand 439 states and 1298 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:37,466 INFO L93 Difference]: Finished difference Result 1185 states and 3506 transitions. [2021-06-05 13:06:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:06:37,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:06:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:37,470 INFO L225 Difference]: With dead ends: 1185 [2021-06-05 13:06:37,470 INFO L226 Difference]: Without dead ends: 1185 [2021-06-05 13:06:37,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:06:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-06-05 13:06:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 493. [2021-06-05 13:06:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 479 states have (on average 3.085594989561587) internal successors, (1478), 492 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1478 transitions. [2021-06-05 13:06:37,489 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1478 transitions. Word has length 10 [2021-06-05 13:06:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:37,489 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1478 transitions. [2021-06-05 13:06:37,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1478 transitions. [2021-06-05 13:06:37,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:06:37,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:37,490 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:37,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 13:06:37,490 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash -74721968, now seen corresponding path program 2 times [2021-06-05 13:06:37,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:37,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787250211] [2021-06-05 13:06:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:37,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:37,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787250211] [2021-06-05 13:06:37,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787250211] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:37,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:37,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:37,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890006363] [2021-06-05 13:06:37,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:06:37,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:06:37,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:06:37,540 INFO L87 Difference]: Start difference. First operand 493 states and 1478 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:37,699 INFO L93 Difference]: Finished difference Result 1021 states and 3063 transitions. [2021-06-05 13:06:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:06:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:06:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:37,704 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 13:06:37,704 INFO L226 Difference]: Without dead ends: 1021 [2021-06-05 13:06:37,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:06:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-05 13:06:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 487. [2021-06-05 13:06:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 473 states have (on average 3.090909090909091) internal successors, (1462), 486 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1462 transitions. [2021-06-05 13:06:37,721 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1462 transitions. Word has length 10 [2021-06-05 13:06:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:37,721 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1462 transitions. [2021-06-05 13:06:37,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1462 transitions. [2021-06-05 13:06:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:06:37,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:37,721 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:37,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 13:06:37,722 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:37,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:37,722 INFO L82 PathProgramCache]: Analyzing trace with hash -74520158, now seen corresponding path program 3 times [2021-06-05 13:06:37,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:37,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009451088] [2021-06-05 13:06:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:37,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:37,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009451088] [2021-06-05 13:06:37,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009451088] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:37,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:37,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:06:37,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648900762] [2021-06-05 13:06:37,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:06:37,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:06:37,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:06:37,764 INFO L87 Difference]: Start difference. First operand 487 states and 1462 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:37,933 INFO L93 Difference]: Finished difference Result 841 states and 2490 transitions. [2021-06-05 13:06:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:06:37,933 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:06:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:37,936 INFO L225 Difference]: With dead ends: 841 [2021-06-05 13:06:37,937 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 13:06:37,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:06:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 13:06:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2021-06-05 13:06:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 401 states have (on average 3.0324189526184537) internal successors, (1216), 414 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1216 transitions. [2021-06-05 13:06:37,948 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1216 transitions. Word has length 10 [2021-06-05 13:06:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:37,948 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1216 transitions. [2021-06-05 13:06:37,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1216 transitions. [2021-06-05 13:06:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:37,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:37,948 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:37,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 13:06:37,949 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1360494811, now seen corresponding path program 1 times [2021-06-05 13:06:37,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:37,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832651323] [2021-06-05 13:06:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:37,951 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:37,953 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:37,954 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:06:37,954 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:06:37,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 13:06:37,954 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2021-06-05 13:06:37,955 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 3 thread instances [2021-06-05 13:06:37,962 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:06:37 BasicIcfg [2021-06-05 13:06:37,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:06:37,963 INFO L168 Benchmark]: Toolchain (without parser) took 3742.08 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 338.3 MB in the beginning and 322.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 89.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:06:37,963 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 358.6 MB. Free memory is still 339.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:06:37,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.43 ms. Allocated memory is still 358.6 MB. Free memory was 338.2 MB in the beginning and 336.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:06:37,963 INFO L168 Benchmark]: Boogie Preprocessor took 8.92 ms. Allocated memory is still 358.6 MB. Free memory was 336.7 MB in the beginning and 335.8 MB in the end (delta: 886.2 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 13:06:37,963 INFO L168 Benchmark]: RCFGBuilder took 145.08 ms. Allocated memory is still 358.6 MB. Free memory was 335.8 MB in the beginning and 327.1 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 13:06:37,963 INFO L168 Benchmark]: TraceAbstraction took 3568.25 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 326.6 MB in the beginning and 322.3 MB in the end (delta: 4.3 MB). Peak memory consumption was 76.5 MB. Max. memory is 16.0 GB. [2021-06-05 13:06:37,963 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 0.10 ms. Allocated memory is still 358.6 MB. Free memory is still 339.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.43 ms. Allocated memory is still 358.6 MB. Free memory was 338.2 MB in the beginning and 336.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.92 ms. Allocated memory is still 358.6 MB. Free memory was 336.7 MB in the beginning and 335.8 MB in the end (delta: 886.2 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 145.08 ms. Allocated memory is still 358.6 MB. Free memory was 335.8 MB in the beginning and 327.1 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3568.25 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 326.6 MB in the beginning and 322.3 MB in the end (delta: 4.3 MB). Peak memory consumption was 76.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: assertion can be violated assertion can be violated We found a FailurePath: [L24] 0 x := 0; VAL [x=0] [L25] 0 i := 0; VAL [i=0, x=0] [L28] FORK 0 fork i thread(i); VAL [i=0, x=0, y=0] [L16] 1 x := x + 1; VAL [i=0, x=1, y=0] [L29] 0 i := i + 1; VAL [i=1, x=1, y=0] [L28] FORK 0 fork i thread(i); VAL [i=1, x=1, y=0] [L29] 0 i := i + 1; VAL [i=2, x=1, y=0] [L28] FORK 0 fork i thread(i); VAL [i=2, x=1, y=0] [L16] 3 x := x + 1; VAL [i=2, x=2, y=0] [L16] 2 x := x + 1; VAL [i=2, x=3, y=0] [L17] 1 assert x <= y + 2; VAL [i=2, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 241.0ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 4.4ms, AutomataDifference: 63.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6 SDtfs, 14 SDslu, 15 SDs, 0 SdLazy, 14 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3ms SsaConstructionTime, 11.8ms SatisfiabilityAnalysisTime, 73.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 with 2 thread instances CFG has 4 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1107.4ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 2.7ms, AutomataDifference: 425.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 53 SDtfs, 209 SDslu, 186 SDs, 0 SdLazy, 342 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 153.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 302.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=0, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 56.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 111 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.4ms SsaConstructionTime, 20.3ms SatisfiabilityAnalysisTime, 313.4ms InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 185 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 4/6 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 with 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2104.8ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 4.9ms, AutomataDifference: 1257.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 147 SDtfs, 765 SDslu, 594 SDs, 0 SdLazy, 1441 SolverSat, 206 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 631.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 490.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=594occurred in iteration=0, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 161.1ms AutomataMinimizationTime, 10 MinimizatonAttempts, 5037 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.7ms SsaConstructionTime, 37.4ms SatisfiabilityAnalysisTime, 335.0ms InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 328 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 20/22 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 3 procedures, 16 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.1ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: TRACE_CHECK: 0.3ms SsaConstructionTime, 1.7ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 2 thread instances CFG has 4 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0ms, OverallIterations: 1, TraceHistogramMax: 2, EmptinessCheckTime: 0.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred 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: TRACE_CHECK: 0.2ms SsaConstructionTime, 1.9ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 0 CEGAR loops. No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...