/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 17:51:27,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 17:51:27,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 17:51:27,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-13 17:51:27,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-13 17:51:27,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-13 17:51:27,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-13 17:51:27,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-13 17:51:27,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-13 17:51:27,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-13 17:51:27,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-13 17:51:27,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-13 17:51:27,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-13 17:51:27,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-13 17:51:27,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-13 17:51:27,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-13 17:51:27,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-13 17:51:27,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-13 17:51:27,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-13 17:51:27,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-13 17:51:27,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-13 17:51:27,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-13 17:51:27,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-13 17:51:27,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-13 17:51:27,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-13 17:51:27,240 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-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf [2021-08-13 17:51:27,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 17:51:27,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 17:51:27,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 17:51:27,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 17:51:27,271 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 17:51:27,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 17:51:27,271 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 17:51:27,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 17:51:27,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 17:51:27,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 17:51:27,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 17:51:27,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 17:51:27,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 17:51:27,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 17:51:27,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 17:51:27,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 17:51:27,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 17:51:27,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 17:51:27,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 17:51:27,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 17:51:27,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 17:51:27,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 17:51:27,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 17:51:27,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Use hitting sets in computation of OwickiGries annotation=true [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-13 17:51:27,274 INFO L138 SettingsManager]: * Simplify away covered predicates in OwickiGries annotation=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 17:51:27,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 17:51:27,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 17:51:27,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 17:51:27,563 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 17:51:27,565 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 17:51:27,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-08-13 17:51:27,566 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-08-13 17:51:27,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 17:51:27,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 17:51:27,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 17:51:27,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 17:51:27,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 17:51:27,592 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 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,597 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 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 17:51:27,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 17:51:27,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 17:51:27,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 17:51:27,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/1) ... [2021-08-13 17:51:27,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 17:51:27,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 17:51:27,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 17:51:27,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 17:51:27,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 17:51:27,675 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 17:51:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 17:51:27,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 17:51:27,676 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-08-13 17:51:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-08-13 17:51:27,676 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-08-13 17:51:27,677 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 17:51:27,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 17:51:27,771 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-13 17:51:27,772 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 05:51:27 BoogieIcfgContainer [2021-08-13 17:51:27,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 17:51:27,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 17:51:27,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 17:51:27,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 17:51:27,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:51:27" (1/2) ... [2021-08-13 17:51:27,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e08b86 and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 05:51:27, skipping insertion in model container [2021-08-13 17:51:27,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 05:51:27" (2/2) ... [2021-08-13 17:51:27,777 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-08-13 17:51:27,781 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 17:51:27,781 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 17:51:27,781 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 17:51:27,793 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:27,793 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:27,793 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:27,794 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:27,798 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:51:27,813 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-13 17:51:27,826 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:51:27,827 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:51:27,827 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:51:27,827 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:51:27,827 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:51:27,827 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:51:27,827 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:51:27,827 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:51:27,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 10 transitions, 25 flow [2021-08-13 17:51:27,860 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-13 17:51:27,860 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:51:27,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 11 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 17:51:27,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 10 transitions, 25 flow [2021-08-13 17:51:27,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 10 transitions, 25 flow [2021-08-13 17:51:27,868 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-08-13 17:51:27,868 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:51:27,868 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:27,869 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:51:27,869 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash 43134229, now seen corresponding path program 1 times [2021-08-13 17:51:27,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:27,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517481193] [2021-08-13 17:51:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:27,952 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:27,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:27,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:27,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:27,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:27,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:27,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:27,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:28,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:28,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517481193] [2021-08-13 17:51:28,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517481193] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:28,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:28,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 17:51:28,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266643868] [2021-08-13 17:51:28,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 17:51:28,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 17:51:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-13 17:51:28,053 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 10 [2021-08-13 17:51:28,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 10 transitions, 25 flow. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:28,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 10 [2021-08-13 17:51:28,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:28,143 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2021-08-13 17:51:28,143 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:51:28,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 15 events. 2/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 17. Up to 6 conditions per place. [2021-08-13 17:51:28,145 INFO L132 encePairwiseOnDemand]: 5/10 looper letters, 3 selfloop transitions, 4 changer transitions 1/10 dead transitions. [2021-08-13 17:51:28,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 39 flow [2021-08-13 17:51:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 17:51:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 17:51:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2021-08-13 17:51:28,154 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2021-08-13 17:51:28,154 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 26 transitions. [2021-08-13 17:51:28,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 26 transitions. [2021-08-13 17:51:28,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:28,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 26 transitions. [2021-08-13 17:51:28,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,161 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,162 INFO L348 CegarLoopForPetriNet]: 13 programPoint places, 4 predicate places. [2021-08-13 17:51:28,162 INFO L482 AbstractCegarLoop]: Abstraction has has 17 places, 10 transitions, 39 flow [2021-08-13 17:51:28,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,162 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:28,162 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:51:28,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 17:51:28,163 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-08-13 17:51:28,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:28,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472707470] [2021-08-13 17:51:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:51:28,173 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:51:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:51:28,182 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:51:28,190 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:51:28,190 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:51:28,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 17:51:28,192 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 17:51:28,192 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-13 17:51:28,197 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,198 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,198 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,198 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,199 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,199 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,200 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,200 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,203 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:51:28,204 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-13 17:51:28,212 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:51:28,212 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:51:28,212 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:51:28,212 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:51:28,213 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:51:28,213 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:51:28,213 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:51:28,213 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:51:28,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 17:51:28,221 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-08-13 17:51:28,221 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 17:51:28,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 18 events. 0/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 29 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-08-13 17:51:28,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 17:51:28,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-08-13 17:51:28,226 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-08-13 17:51:28,226 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 17:51:28,227 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:28,227 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:51:28,227 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:28,227 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-08-13 17:51:28,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:28,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112764976] [2021-08-13 17:51:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:28,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:28,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:28,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112764976] [2021-08-13 17:51:28,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112764976] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:28,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:28,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 17:51:28,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792805949] [2021-08-13 17:51:28,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 17:51:28,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:28,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 17:51:28,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-13 17:51:28,279 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 15 [2021-08-13 17:51:28,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:28,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 15 [2021-08-13 17:51:28,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:28,349 INFO L129 PetriNetUnfolder]: 34/88 cut-off events. [2021-08-13 17:51:28,349 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-08-13 17:51:28,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 88 events. 34/88 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 279 event pairs, 4 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 129. Up to 44 conditions per place. [2021-08-13 17:51:28,351 INFO L132 encePairwiseOnDemand]: 9/15 looper letters, 12 selfloop transitions, 7 changer transitions 0/23 dead transitions. [2021-08-13 17:51:28,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 101 flow [2021-08-13 17:51:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 17:51:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 17:51:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2021-08-13 17:51:28,359 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2021-08-13 17:51:28,360 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 44 transitions. [2021-08-13 17:51:28,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 44 transitions. [2021-08-13 17:51:28,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:28,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 44 transitions. [2021-08-13 17:51:28,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,361 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,361 INFO L348 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-08-13 17:51:28,361 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 101 flow [2021-08-13 17:51:28,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,361 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:28,361 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2021-08-13 17:51:28,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 17:51:28,362 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:28,362 INFO L82 PathProgramCache]: Analyzing trace with hash -622629923, now seen corresponding path program 1 times [2021-08-13 17:51:28,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:28,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088363846] [2021-08-13 17:51:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:51:28,366 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:51:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:51:28,384 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:51:28,385 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:51:28,385 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:51:28,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 17:51:28,385 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 17:51:28,385 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-13 17:51:28,398 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,398 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,399 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,399 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,399 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,399 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,399 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,399 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,400 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,400 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,400 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,400 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:28,418 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:51:28,419 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-13 17:51:28,419 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:51:28,419 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:51:28,420 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:51:28,420 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:51:28,420 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:51:28,420 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:51:28,420 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:51:28,420 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:51:28,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 20 transitions, 61 flow [2021-08-13 17:51:28,424 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-08-13 17:51:28,424 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-08-13 17:51:28,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 25 events. 0/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-08-13 17:51:28,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 20 transitions, 61 flow [2021-08-13 17:51:28,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 20 transitions, 61 flow [2021-08-13 17:51:28,426 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-08-13 17:51:28,426 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 17:51:28,426 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:28,426 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:51:28,426 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash 76542848, now seen corresponding path program 1 times [2021-08-13 17:51:28,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:28,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638643064] [2021-08-13 17:51:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:28,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:28,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:28,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638643064] [2021-08-13 17:51:28,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638643064] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:28,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:28,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 17:51:28,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170068227] [2021-08-13 17:51:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 17:51:28,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 17:51:28,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-13 17:51:28,472 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 17:51:28,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-08-13 17:51:28,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:28,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 17:51:28,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:28,610 INFO L129 PetriNetUnfolder]: 268/491 cut-off events. [2021-08-13 17:51:28,611 INFO L130 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2021-08-13 17:51:28,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 491 events. 268/491 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2139 event pairs, 66 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 733. Up to 373 conditions per place. [2021-08-13 17:51:28,620 INFO L132 encePairwiseOnDemand]: 13/20 looper letters, 22 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2021-08-13 17:51:28,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 174 flow [2021-08-13 17:51:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 17:51:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 17:51:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2021-08-13 17:51:28,622 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2021-08-13 17:51:28,622 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 62 transitions. [2021-08-13 17:51:28,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 62 transitions. [2021-08-13 17:51:28,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:28,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 62 transitions. [2021-08-13 17:51:28,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,624 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,624 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2021-08-13 17:51:28,624 INFO L482 AbstractCegarLoop]: Abstraction has has 32 places, 36 transitions, 174 flow [2021-08-13 17:51:28,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-08-13 17:51:28,624 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:28,624 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:28,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 17:51:28,625 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash 542941744, now seen corresponding path program 1 times [2021-08-13 17:51:28,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:28,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031927117] [2021-08-13 17:51:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:28,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:28,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:28,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:28,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:28,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031927117] [2021-08-13 17:51:28,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031927117] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:28,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:28,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 17:51:28,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169178844] [2021-08-13 17:51:28,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 17:51:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 17:51:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 17:51:28,681 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 17:51:28,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 36 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:28,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 17:51:28,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:28,929 INFO L129 PetriNetUnfolder]: 475/939 cut-off events. [2021-08-13 17:51:28,929 INFO L130 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2021-08-13 17:51:28,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 939 events. 475/939 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5409 event pairs, 116 based on Foata normal form. 0/747 useless extension candidates. Maximal degree in co-relation 1313. Up to 696 conditions per place. [2021-08-13 17:51:28,951 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 45 selfloop transitions, 24 changer transitions 0/74 dead transitions. [2021-08-13 17:51:28,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 490 flow [2021-08-13 17:51:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 17:51:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 17:51:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2021-08-13 17:51:28,954 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.575 [2021-08-13 17:51:28,954 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 115 transitions. [2021-08-13 17:51:28,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 115 transitions. [2021-08-13 17:51:28,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:28,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 115 transitions. [2021-08-13 17:51:28,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,956 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,957 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2021-08-13 17:51:28,957 INFO L482 AbstractCegarLoop]: Abstraction has has 41 places, 74 transitions, 490 flow [2021-08-13 17:51:28,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:28,957 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:28,957 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:28,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-13 17:51:28,958 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash -348674961, now seen corresponding path program 1 times [2021-08-13 17:51:28,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:28,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657903403] [2021-08-13 17:51:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:28,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:28,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:28,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:28,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:28,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:29,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657903403] [2021-08-13 17:51:29,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657903403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 17:51:29,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767748567] [2021-08-13 17:51:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-13 17:51:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-13 17:51:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-13 17:51:29,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,050 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,051 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,059 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:51:29,061 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:29,071 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 17:51:29,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,080 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,088 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,088 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:29,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:51:29,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 17:51:29,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:29,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:51:29,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 17:51:29,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:29,132 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:51:29,133 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 17:51:29,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:29,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:51:29,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 17:51:29,137 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:29,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767748567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 17:51:29,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-13 17:51:29,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-13 17:51:29,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770997308] [2021-08-13 17:51:29,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-13 17:51:29,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:29,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-13 17:51:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-13 17:51:29,149 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 17:51:29,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 74 transitions, 490 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:29,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 17:51:29,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:29,295 INFO L129 PetriNetUnfolder]: 416/878 cut-off events. [2021-08-13 17:51:29,295 INFO L130 PetriNetUnfolder]: For 219/219 co-relation queries the response was YES. [2021-08-13 17:51:29,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 878 events. 416/878 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5258 event pairs, 31 based on Foata normal form. 0/720 useless extension candidates. Maximal degree in co-relation 755. Up to 625 conditions per place. [2021-08-13 17:51:29,303 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 61 selfloop transitions, 27 changer transitions 0/93 dead transitions. [2021-08-13 17:51:29,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 93 transitions, 780 flow [2021-08-13 17:51:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 17:51:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 17:51:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2021-08-13 17:51:29,306 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5125 [2021-08-13 17:51:29,306 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 82 transitions. [2021-08-13 17:51:29,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 82 transitions. [2021-08-13 17:51:29,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:29,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 82 transitions. [2021-08-13 17:51:29,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,309 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,310 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2021-08-13 17:51:29,310 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 93 transitions, 780 flow [2021-08-13 17:51:29,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,310 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:29,310 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:29,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-13 17:51:29,525 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash -339906925, now seen corresponding path program 1 times [2021-08-13 17:51:29,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:29,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350683244] [2021-08-13 17:51:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:29,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,543 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:29,547 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 17:51:29,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:29,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350683244] [2021-08-13 17:51:29,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350683244] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:29,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:29,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 17:51:29,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812970167] [2021-08-13 17:51:29,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 17:51:29,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:29,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 17:51:29,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 17:51:29,560 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 17:51:29,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 93 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:29,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 17:51:29,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:29,779 INFO L129 PetriNetUnfolder]: 605/1363 cut-off events. [2021-08-13 17:51:29,779 INFO L130 PetriNetUnfolder]: For 405/405 co-relation queries the response was YES. [2021-08-13 17:51:29,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5957 conditions, 1363 events. 605/1363 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9587 event pairs, 64 based on Foata normal form. 0/1100 useless extension candidates. Maximal degree in co-relation 860. Up to 968 conditions per place. [2021-08-13 17:51:29,789 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 95 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2021-08-13 17:51:29,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 134 transitions, 1380 flow [2021-08-13 17:51:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 17:51:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 17:51:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2021-08-13 17:51:29,791 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.595 [2021-08-13 17:51:29,792 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 119 transitions. [2021-08-13 17:51:29,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 119 transitions. [2021-08-13 17:51:29,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:29,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 119 transitions. [2021-08-13 17:51:29,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,796 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,796 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2021-08-13 17:51:29,797 INFO L482 AbstractCegarLoop]: Abstraction has has 57 places, 134 transitions, 1380 flow [2021-08-13 17:51:29,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,797 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:29,797 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:29,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-13 17:51:29,798 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:29,798 INFO L82 PathProgramCache]: Analyzing trace with hash -348844225, now seen corresponding path program 2 times [2021-08-13 17:51:29,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:29,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123232213] [2021-08-13 17:51:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:29,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:29,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:29,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:29,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 17:51:29,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:29,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123232213] [2021-08-13 17:51:29,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123232213] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:29,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:29,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 17:51:29,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492923334] [2021-08-13 17:51:29,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 17:51:29,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 17:51:29,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 17:51:29,861 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 17:51:29,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 134 transitions, 1380 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:29,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:29,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 17:51:29,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:30,109 INFO L129 PetriNetUnfolder]: 686/1545 cut-off events. [2021-08-13 17:51:30,109 INFO L130 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2021-08-13 17:51:30,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1545 events. 686/1545 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 11349 event pairs, 86 based on Foata normal form. 0/1276 useless extension candidates. Maximal degree in co-relation 1487. Up to 1097 conditions per place. [2021-08-13 17:51:30,146 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 122 selfloop transitions, 34 changer transitions 0/161 dead transitions. [2021-08-13 17:51:30,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 161 transitions, 1983 flow [2021-08-13 17:51:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-13 17:51:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-08-13 17:51:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 143 transitions. [2021-08-13 17:51:30,147 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.55 [2021-08-13 17:51:30,148 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 143 transitions. [2021-08-13 17:51:30,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 143 transitions. [2021-08-13 17:51:30,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:30,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 143 transitions. [2021-08-13 17:51:30,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,149 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,150 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2021-08-13 17:51:30,150 INFO L482 AbstractCegarLoop]: Abstraction has has 69 places, 161 transitions, 1983 flow [2021-08-13 17:51:30,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,150 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:30,150 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:30,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-13 17:51:30,150 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:30,150 INFO L82 PathProgramCache]: Analyzing trace with hash -348674965, now seen corresponding path program 3 times [2021-08-13 17:51:30,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:30,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524149433] [2021-08-13 17:51:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:30,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:30,205 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:30,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,211 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:30,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:30,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524149433] [2021-08-13 17:51:30,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524149433] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:30,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:30,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 17:51:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127041719] [2021-08-13 17:51:30,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 17:51:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:30,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 17:51:30,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 17:51:30,228 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 17:51:30,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 161 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:30,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 17:51:30,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:30,485 INFO L129 PetriNetUnfolder]: 627/1445 cut-off events. [2021-08-13 17:51:30,485 INFO L130 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2021-08-13 17:51:30,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8472 conditions, 1445 events. 627/1445 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10542 event pairs, 71 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 1334. Up to 1007 conditions per place. [2021-08-13 17:51:30,500 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 116 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2021-08-13 17:51:30,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 158 transitions, 2253 flow [2021-08-13 17:51:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-13 17:51:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-08-13 17:51:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2021-08-13 17:51:30,502 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2021-08-13 17:51:30,502 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 136 transitions. [2021-08-13 17:51:30,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 136 transitions. [2021-08-13 17:51:30,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:30,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 136 transitions. [2021-08-13 17:51:30,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,504 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,504 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 53 predicate places. [2021-08-13 17:51:30,504 INFO L482 AbstractCegarLoop]: Abstraction has has 80 places, 158 transitions, 2253 flow [2021-08-13 17:51:30,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,504 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:30,504 INFO L266 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:30,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-13 17:51:30,505 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2075805806, now seen corresponding path program 1 times [2021-08-13 17:51:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:30,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198254298] [2021-08-13 17:51:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:51:30,510 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:51:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:51:30,519 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:51:30,522 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:51:30,522 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:51:30,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-13 17:51:30,522 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 17:51:30,523 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-13 17:51:30,527 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,527 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,527 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,527 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,528 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,528 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,528 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,528 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,528 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,528 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,528 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,529 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,529 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,529 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,529 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,529 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:51:30,533 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:51:30,533 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-13 17:51:30,547 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:51:30,547 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:51:30,547 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:51:30,547 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:51:30,547 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:51:30,547 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:51:30,547 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:51:30,547 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:51:30,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 25 transitions, 82 flow [2021-08-13 17:51:30,551 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-08-13 17:51:30,551 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-08-13 17:51:30,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 32 events. 0/32 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-08-13 17:51:30,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 25 transitions, 82 flow [2021-08-13 17:51:30,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 25 transitions, 82 flow [2021-08-13 17:51:30,552 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-08-13 17:51:30,552 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 17:51:30,552 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:30,552 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:51:30,552 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash 100404189, now seen corresponding path program 1 times [2021-08-13 17:51:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:30,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166081375] [2021-08-13 17:51:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:30,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:30,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:30,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166081375] [2021-08-13 17:51:30,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166081375] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:30,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:30,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 17:51:30,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32882084] [2021-08-13 17:51:30,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 17:51:30,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:30,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 17:51:30,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-13 17:51:30,610 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:30,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:30,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:30,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:30,765 INFO L129 PetriNetUnfolder]: 1604/2502 cut-off events. [2021-08-13 17:51:30,765 INFO L130 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2021-08-13 17:51:30,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5176 conditions, 2502 events. 1604/2502 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12494 event pairs, 600 based on Foata normal form. 0/1884 useless extension candidates. Maximal degree in co-relation 3735. Up to 2176 conditions per place. [2021-08-13 17:51:30,785 INFO L132 encePairwiseOnDemand]: 17/25 looper letters, 30 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2021-08-13 17:51:30,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 245 flow [2021-08-13 17:51:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 17:51:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 17:51:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2021-08-13 17:51:30,786 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.52 [2021-08-13 17:51:30,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 78 transitions. [2021-08-13 17:51:30,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 78 transitions. [2021-08-13 17:51:30,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:30,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 78 transitions. [2021-08-13 17:51:30,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,787 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,787 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2021-08-13 17:51:30,787 INFO L482 AbstractCegarLoop]: Abstraction has has 39 places, 47 transitions, 245 flow [2021-08-13 17:51:30,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,788 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:30,788 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:30,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-13 17:51:30,788 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:30,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1998981745, now seen corresponding path program 1 times [2021-08-13 17:51:30,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:30,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888618949] [2021-08-13 17:51:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:30,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,815 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:30,825 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:30,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:30,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:30,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:30,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888618949] [2021-08-13 17:51:30,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888618949] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:30,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:30,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 17:51:30,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422094022] [2021-08-13 17:51:30,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 17:51:30,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:30,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 17:51:30,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 17:51:30,836 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:30,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 47 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:30,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:30,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:30,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:31,289 INFO L129 PetriNetUnfolder]: 3369/5584 cut-off events. [2021-08-13 17:51:31,289 INFO L130 PetriNetUnfolder]: For 2584/2584 co-relation queries the response was YES. [2021-08-13 17:51:31,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16772 conditions, 5584 events. 3369/5584 cut-off events. For 2584/2584 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 36198 event pairs, 1067 based on Foata normal form. 0/4323 useless extension candidates. Maximal degree in co-relation 6169. Up to 4644 conditions per place. [2021-08-13 17:51:31,332 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 65 selfloop transitions, 29 changer transitions 0/100 dead transitions. [2021-08-13 17:51:31,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 100 transitions, 707 flow [2021-08-13 17:51:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 17:51:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 17:51:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2021-08-13 17:51:31,334 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.592 [2021-08-13 17:51:31,334 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 148 transitions. [2021-08-13 17:51:31,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 148 transitions. [2021-08-13 17:51:31,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:31,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 148 transitions. [2021-08-13 17:51:31,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:31,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:31,335 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:31,335 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2021-08-13 17:51:31,335 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 100 transitions, 707 flow [2021-08-13 17:51:31,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:31,336 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:31,337 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:31,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-13 17:51:31,337 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1838891887, now seen corresponding path program 1 times [2021-08-13 17:51:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:31,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493390374] [2021-08-13 17:51:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:31,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:31,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:31,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:31,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:31,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:31,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:31,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:31,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:31,375 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:31,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:31,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:31,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:31,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:31,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493390374] [2021-08-13 17:51:31,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493390374] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:31,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:31,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 17:51:31,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916250885] [2021-08-13 17:51:31,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 17:51:31,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 17:51:31,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 17:51:31,390 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:31,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 100 transitions, 707 flow. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:31,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:31,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:31,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:31,964 INFO L129 PetriNetUnfolder]: 3375/5626 cut-off events. [2021-08-13 17:51:31,964 INFO L130 PetriNetUnfolder]: For 2629/2629 co-relation queries the response was YES. [2021-08-13 17:51:31,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21717 conditions, 5626 events. 3375/5626 cut-off events. For 2629/2629 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36936 event pairs, 452 based on Foata normal form. 0/4413 useless extension candidates. Maximal degree in co-relation 3994. Up to 4668 conditions per place. [2021-08-13 17:51:32,014 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 90 selfloop transitions, 42 changer transitions 0/138 dead transitions. [2021-08-13 17:51:32,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 138 transitions, 1224 flow [2021-08-13 17:51:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-13 17:51:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-08-13 17:51:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2021-08-13 17:51:32,017 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2021-08-13 17:51:32,017 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 205 transitions. [2021-08-13 17:51:32,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 205 transitions. [2021-08-13 17:51:32,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:32,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 205 transitions. [2021-08-13 17:51:32,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,019 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,019 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2021-08-13 17:51:32,019 INFO L482 AbstractCegarLoop]: Abstraction has has 60 places, 138 transitions, 1224 flow [2021-08-13 17:51:32,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,019 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:32,019 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:32,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-13 17:51:32,019 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1838484543, now seen corresponding path program 1 times [2021-08-13 17:51:32,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:32,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260496019] [2021-08-13 17:51:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:32,040 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,050 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:32,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:32,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260496019] [2021-08-13 17:51:32,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260496019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 17:51:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740737317] [2021-08-13 17:51:32,061 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-13 17:51:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:32,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-13 17:51:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-13 17:51:32,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:51:32,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:32,120 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 17:51:32,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,132 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,133 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:32,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:51:32,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 17:51:32,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:32,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:51:32,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 17:51:32,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,159 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,162 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:32,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:51:32,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 17:51:32,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:51:32,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:51:32,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 17:51:32,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:51:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:32,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740737317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 17:51:32,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-13 17:51:32,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-13 17:51:32,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811327606] [2021-08-13 17:51:32,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-13 17:51:32,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:32,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-13 17:51:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-13 17:51:32,185 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:32,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 138 transitions, 1224 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:32,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:32,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:32,637 INFO L129 PetriNetUnfolder]: 3441/6001 cut-off events. [2021-08-13 17:51:32,637 INFO L130 PetriNetUnfolder]: For 2636/2636 co-relation queries the response was YES. [2021-08-13 17:51:32,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27672 conditions, 6001 events. 3441/6001 cut-off events. For 2636/2636 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 42628 event pairs, 522 based on Foata normal form. 0/4739 useless extension candidates. Maximal degree in co-relation 10667. Up to 4865 conditions per place. [2021-08-13 17:51:32,685 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 125 selfloop transitions, 47 changer transitions 0/178 dead transitions. [2021-08-13 17:51:32,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 178 transitions, 1915 flow [2021-08-13 17:51:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 17:51:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 17:51:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2021-08-13 17:51:32,686 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.565 [2021-08-13 17:51:32,686 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 113 transitions. [2021-08-13 17:51:32,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 113 transitions. [2021-08-13 17:51:32,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:32,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 113 transitions. [2021-08-13 17:51:32,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,687 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,688 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2021-08-13 17:51:32,688 INFO L482 AbstractCegarLoop]: Abstraction has has 67 places, 178 transitions, 1915 flow [2021-08-13 17:51:32,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,688 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:32,688 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:32,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-13 17:51:32,901 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1843846927, now seen corresponding path program 2 times [2021-08-13 17:51:32,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:32,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714943988] [2021-08-13 17:51:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:32,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:32,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:32,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:32,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 17:51:32,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714943988] [2021-08-13 17:51:32,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714943988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:32,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:32,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 17:51:32,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221559613] [2021-08-13 17:51:32,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 17:51:32,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 17:51:32,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 17:51:32,926 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:32,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 178 transitions, 1915 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:32,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:32,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:32,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:33,690 INFO L129 PetriNetUnfolder]: 5107/9187 cut-off events. [2021-08-13 17:51:33,690 INFO L130 PetriNetUnfolder]: For 4354/4354 co-relation queries the response was YES. [2021-08-13 17:51:33,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49444 conditions, 9187 events. 5107/9187 cut-off events. For 4354/4354 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 73242 event pairs, 821 based on Foata normal form. 0/7095 useless extension candidates. Maximal degree in co-relation 12732. Up to 7355 conditions per place. [2021-08-13 17:51:33,762 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 164 selfloop transitions, 70 changer transitions 0/240 dead transitions. [2021-08-13 17:51:33,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 240 transitions, 3055 flow [2021-08-13 17:51:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 17:51:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 17:51:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2021-08-13 17:51:33,764 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.616 [2021-08-13 17:51:33,764 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 154 transitions. [2021-08-13 17:51:33,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 154 transitions. [2021-08-13 17:51:33,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:33,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 154 transitions. [2021-08-13 17:51:33,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:33,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:33,765 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:33,765 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2021-08-13 17:51:33,765 INFO L482 AbstractCegarLoop]: Abstraction has has 76 places, 240 transitions, 3055 flow [2021-08-13 17:51:33,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:33,765 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:33,765 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:33,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-13 17:51:33,765 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1170789958, now seen corresponding path program 1 times [2021-08-13 17:51:33,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:33,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195745522] [2021-08-13 17:51:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:33,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:33,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:33,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:33,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:33,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:33,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:33,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:33,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:33,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:33,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:33,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:33,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:33,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:33,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195745522] [2021-08-13 17:51:33,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195745522] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:33,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:33,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 17:51:33,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346449885] [2021-08-13 17:51:33,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 17:51:33,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 17:51:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 17:51:33,894 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:33,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 240 transitions, 3055 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:33,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:33,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:33,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:35,002 INFO L129 PetriNetUnfolder]: 6442/11724 cut-off events. [2021-08-13 17:51:35,003 INFO L130 PetriNetUnfolder]: For 5784/5784 co-relation queries the response was YES. [2021-08-13 17:51:35,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72333 conditions, 11724 events. 6442/11724 cut-off events. For 5784/5784 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 98912 event pairs, 946 based on Foata normal form. 0/9067 useless extension candidates. Maximal degree in co-relation 9557. Up to 9349 conditions per place. [2021-08-13 17:51:35,210 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 258 selfloop transitions, 108 changer transitions 0/372 dead transitions. [2021-08-13 17:51:35,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 372 transitions, 5414 flow [2021-08-13 17:51:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-13 17:51:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-08-13 17:51:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 171 transitions. [2021-08-13 17:51:35,212 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.57 [2021-08-13 17:51:35,212 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 171 transitions. [2021-08-13 17:51:35,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 171 transitions. [2021-08-13 17:51:35,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:35,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 171 transitions. [2021-08-13 17:51:35,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:35,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:35,217 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:35,217 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 53 predicate places. [2021-08-13 17:51:35,217 INFO L482 AbstractCegarLoop]: Abstraction has has 87 places, 372 transitions, 5414 flow [2021-08-13 17:51:35,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:35,217 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:35,217 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:35,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-13 17:51:35,217 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:35,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:35,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1934440940, now seen corresponding path program 1 times [2021-08-13 17:51:35,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:35,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569328384] [2021-08-13 17:51:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:35,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:35,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:35,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:35,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:35,241 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:35,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:35,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:35,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:35,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:35,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:35,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:35,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:35,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:35,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 17:51:35,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569328384] [2021-08-13 17:51:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569328384] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:35,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:35,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 17:51:35,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993750172] [2021-08-13 17:51:35,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 17:51:35,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 17:51:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 17:51:35,259 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:35,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 372 transitions, 5414 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:35,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:35,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:35,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:36,502 INFO L129 PetriNetUnfolder]: 6758/12250 cut-off events. [2021-08-13 17:51:36,502 INFO L130 PetriNetUnfolder]: For 6198/6198 co-relation queries the response was YES. [2021-08-13 17:51:36,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85743 conditions, 12250 events. 6758/12250 cut-off events. For 6198/6198 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 103443 event pairs, 964 based on Foata normal form. 0/9593 useless extension candidates. Maximal degree in co-relation 11644. Up to 9781 conditions per place. [2021-08-13 17:51:36,609 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 283 selfloop transitions, 140 changer transitions 0/429 dead transitions. [2021-08-13 17:51:36,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 429 transitions, 7085 flow [2021-08-13 17:51:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-13 17:51:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-08-13 17:51:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 211 transitions. [2021-08-13 17:51:36,611 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5626666666666666 [2021-08-13 17:51:36,611 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 211 transitions. [2021-08-13 17:51:36,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 211 transitions. [2021-08-13 17:51:36,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:36,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 211 transitions. [2021-08-13 17:51:36,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 14.066666666666666) internal successors, (211), 15 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:36,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 25.0) internal successors, (400), 16 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:36,615 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 25.0) internal successors, (400), 16 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:36,615 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 67 predicate places. [2021-08-13 17:51:36,615 INFO L482 AbstractCegarLoop]: Abstraction has has 101 places, 429 transitions, 7085 flow [2021-08-13 17:51:36,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:36,615 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:36,615 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:36,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-13 17:51:36,616 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1884882076, now seen corresponding path program 1 times [2021-08-13 17:51:36,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:36,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701622363] [2021-08-13 17:51:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:36,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:36,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:36,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:36,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:36,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:36,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:36,637 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:36,638 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:36,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:36,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:36,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:36,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:36,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:36,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 17:51:36,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:36,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701622363] [2021-08-13 17:51:36,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701622363] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:36,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:36,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 17:51:36,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959423234] [2021-08-13 17:51:36,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 17:51:36,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 17:51:36,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 17:51:36,654 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:36,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 429 transitions, 7085 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:36,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:36,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:36,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:38,401 INFO L129 PetriNetUnfolder]: 8781/16344 cut-off events. [2021-08-13 17:51:38,401 INFO L130 PetriNetUnfolder]: For 8986/8986 co-relation queries the response was YES. [2021-08-13 17:51:38,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125673 conditions, 16344 events. 8781/16344 cut-off events. For 8986/8986 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 149994 event pairs, 1208 based on Foata normal form. 0/12756 useless extension candidates. Maximal degree in co-relation 17216. Up to 12772 conditions per place. [2021-08-13 17:51:38,550 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 357 selfloop transitions, 215 changer transitions 0/578 dead transitions. [2021-08-13 17:51:38,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 578 transitions, 10667 flow [2021-08-13 17:51:38,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-13 17:51:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-08-13 17:51:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2021-08-13 17:51:38,552 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2021-08-13 17:51:38,552 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 178 transitions. [2021-08-13 17:51:38,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 178 transitions. [2021-08-13 17:51:38,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:38,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 178 transitions. [2021-08-13 17:51:38,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:38,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:38,553 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:38,553 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 78 predicate places. [2021-08-13 17:51:38,553 INFO L482 AbstractCegarLoop]: Abstraction has has 112 places, 578 transitions, 10667 flow [2021-08-13 17:51:38,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:38,554 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:38,554 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:38,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-13 17:51:38,554 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1934758070, now seen corresponding path program 2 times [2021-08-13 17:51:38,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:38,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834771314] [2021-08-13 17:51:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:51:38,560 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:38,560 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:38,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:38,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:38,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:38,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:38,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:38,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:38,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:38,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:38,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:38,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 17:51:38,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:51:38,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:51:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:51:38,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:51:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834771314] [2021-08-13 17:51:38,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834771314] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:51:38,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:51:38,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 17:51:38,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851226165] [2021-08-13 17:51:38,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 17:51:38,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:51:38,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 17:51:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-13 17:51:38,783 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 17:51:38,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 578 transitions, 10667 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:38,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:51:38,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 17:51:38,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:51:40,802 INFO L129 PetriNetUnfolder]: 8595/15915 cut-off events. [2021-08-13 17:51:40,803 INFO L130 PetriNetUnfolder]: For 8306/8306 co-relation queries the response was YES. [2021-08-13 17:51:40,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135501 conditions, 15915 events. 8595/15915 cut-off events. For 8306/8306 co-relation queries the response was YES. Maximal size of possible extension queue 1539. Compared 144328 event pairs, 1452 based on Foata normal form. 0/12399 useless extension candidates. Maximal degree in co-relation 14275. Up to 12520 conditions per place. [2021-08-13 17:51:41,025 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 416 selfloop transitions, 153 changer transitions 0/575 dead transitions. [2021-08-13 17:51:41,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 575 transitions, 11751 flow [2021-08-13 17:51:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-13 17:51:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-08-13 17:51:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 203 transitions. [2021-08-13 17:51:41,040 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.58 [2021-08-13 17:51:41,040 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 203 transitions. [2021-08-13 17:51:41,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 203 transitions. [2021-08-13 17:51:41,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:51:41,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 203 transitions. [2021-08-13 17:51:41,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 14.5) internal successors, (203), 14 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:41,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:41,042 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:41,042 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 91 predicate places. [2021-08-13 17:51:41,042 INFO L482 AbstractCegarLoop]: Abstraction has has 125 places, 575 transitions, 11751 flow [2021-08-13 17:51:41,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 17:51:41,042 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:51:41,042 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:51:41,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-13 17:51:41,042 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:51:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:51:41,042 INFO L82 PathProgramCache]: Analyzing trace with hash 861015774, now seen corresponding path program 1 times [2021-08-13 17:51:41,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:51:41,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403014759] [2021-08-13 17:51:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:51:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:51:41,045 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:51:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:51:41,046 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:51:41,047 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:51:41,048 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:51:41,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-13 17:51:41,050 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 4 thread instances [2021-08-13 17:51:41,067 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.08 05:51:41 BasicIcfg [2021-08-13 17:51:41,067 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-13 17:51:41,068 INFO L168 Benchmark]: Toolchain (without parser) took 13484.83 ms. Allocated memory was 202.4 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 182.7 MB in the beginning and 2.2 GB in the end (delta: -2.0 GB). Peak memory consumption was 621.6 MB. Max. memory is 8.0 GB. [2021-08-13 17:51:41,068 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-13 17:51:41,068 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.06 ms. Allocated memory is still 202.4 MB. Free memory was 182.7 MB in the beginning and 181.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 17:51:41,068 INFO L168 Benchmark]: Boogie Preprocessor took 16.46 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 180.3 MB in the end (delta: 834.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 17:51:41,068 INFO L168 Benchmark]: RCFGBuilder took 151.50 ms. Allocated memory is still 202.4 MB. Free memory was 180.1 MB in the beginning and 171.6 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-08-13 17:51:41,068 INFO L168 Benchmark]: TraceAbstraction took 13293.63 ms. Allocated memory was 202.4 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 171.1 MB in the beginning and 2.2 GB in the end (delta: -2.0 GB). Peak memory consumption was 610.1 MB. Max. memory is 8.0 GB. [2021-08-13 17:51:41,068 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 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.06 ms. Allocated memory is still 202.4 MB. Free memory was 182.7 MB in the beginning and 181.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.46 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 180.3 MB in the end (delta: 834.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 151.50 ms. Allocated memory is still 202.4 MB. Free memory was 180.1 MB in the beginning and 171.6 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13293.63 ms. Allocated memory was 202.4 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 171.1 MB in the beginning and 2.2 GB in the end (delta: -2.0 GB). Peak memory consumption was 610.1 MB. Max. memory is 8.0 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] [L29] 0 i := i + 1; VAL [i=1, x=0, y=0] [L16] 1 x := x + 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] [L16] 2 x := x + 1; VAL [i=2, x=2, y=0] [L28] FORK 0 fork i thread(i); VAL [i=2, x=2, y=0] [L16] 3 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. EmptinessCheckTime: 3.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 367.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 112.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2 SDtfs, 5 SDslu, 4 SDs, 0 SdLazy, 14 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=1, 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.8ms SsaConstructionTime, 15.0ms SatisfiabilityAnalysisTime, 103.5ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 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. EmptinessCheckTime: 3.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 174.2ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 82.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 11 SDslu, 7 SDs, 0 SdLazy, 37 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=1, 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3ms SsaConstructionTime, 6.7ms SatisfiabilityAnalysisTime, 38.6ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 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 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 2103.1ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 1395.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25 SDtfs, 229 SDslu, 44 SDs, 0 SdLazy, 691 SolverSat, 105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 362.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 353.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2253occurred in iteration=6, InterpolantAutomatonStates: 59, 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: 5.6ms SsaConstructionTime, 31.7ms SatisfiabilityAnalysisTime, 370.5ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 183 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 4 thread instances CFG has 6 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 10513.7ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 9487.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 567 SDslu, 76 SDs, 0 SdLazy, 1726 SolverSat, 250 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 803.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 816.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11751occurred in iteration=9, InterpolantAutomatonStates: 100, 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: 6.0ms SsaConstructionTime, 25.5ms SatisfiabilityAnalysisTime, 657.5ms InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 301 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 19/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...