/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:12:17,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:12:17,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:12:17,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 22:12:17,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 22:12:17,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 22:12:17,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 22:12:17,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 22:12:17,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 22:12:17,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 22:12:17,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 22:12:17,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 22:12:17,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 22:12:17,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 22:12:17,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 22:12:17,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 22:12:17,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 22:12:17,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 22:12:17,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 22:12:17,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 22:12:17,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 22:12:17,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 22:12:17,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 22:12:17,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 22:12:17,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 22:12:17,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 22:12:17,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 22:12:17,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 22:12:17,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 22:12:17,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 22:12:17,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 22:12:17,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 22:12:17,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 22:12:17,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 22:12:17,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 22:12:17,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 22:12:17,820 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-SemanticLbe.epf [2021-03-24 22:12:17,852 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:12:17,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:12:17,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:12:17,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:12:17,854 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:12:17,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:12:17,854 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:12:17,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:12:17,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:12:17,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:12:17,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:12:17,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:12:17,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:12:17,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:12:17,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:12:17,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:12:17,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:12:17,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:12:17,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:12:17,856 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:12:17,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:12:17,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:12:17,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:12:17,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:12:17,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:12:17,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:12:17,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:12:17,857 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:12:17,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:12:18,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:12:18,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:12:18,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:12:18,150 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:12:18,150 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:12:18,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl [2021-03-24 22:12:18,152 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl' [2021-03-24 22:12:18,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:12:18,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:12:18,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:12:18,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:12:18,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:12:18,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:12:18,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:12:18,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:12:18,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:12:18,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/1) ... [2021-03-24 22:12:18,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:12:18,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:12:18,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:12:18,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:12:18,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (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 [2021-03-24 22:12:18,278 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 22:12:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:12:18,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:12:18,280 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-24 22:12:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-24 22:12:18,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-24 22:12:18,282 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 22:12:18,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:12:18,402 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-24 22:12:18,404 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:12:18 BoogieIcfgContainer [2021-03-24 22:12:18,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:12:18,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:12:18,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:12:18,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:12:18,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:12:18" (1/2) ... [2021-03-24 22:12:18,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60134810 and model type fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:12:18, skipping insertion in model container [2021-03-24 22:12:18,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:12:18" (2/2) ... [2021-03-24 22:12:18,412 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_local.bpl [2021-03-24 22:12:18,416 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:12:18,419 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 22:12:18,420 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:12:18,444 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,445 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,446 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,446 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,451 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,455 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:12:18,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 22:12:18,501 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:12:18,501 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:12:18,501 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:12:18,501 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:12:18,502 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:12:18,502 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:12:18,502 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:12:18,502 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:12:18,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-03-24 22:12:18,528 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 22:12:18,528 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:18,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:12:18,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 9 transitions, 23 flow [2021-03-24 22:12:18,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 12 places, 9 transitions, 23 flow [2021-03-24 22:12:18,535 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:12:18,550 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 12 places, 9 transitions, 23 flow [2021-03-24 22:12:18,554 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 12 places, 9 transitions, 23 flow [2021-03-24 22:12:18,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-03-24 22:12:18,561 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 22:12:18,561 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:18,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 10 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:12:18,564 INFO L142 LiptonReduction]: Number of co-enabled transitions 20 [2021-03-24 22:12:18,767 INFO L154 LiptonReduction]: Checked pairs total: 8 [2021-03-24 22:12:18,767 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 22:12:18,769 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 235 [2021-03-24 22:12:18,779 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2021-03-24 22:12:18,779 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:18,779 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:18,780 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-03-24 22:12:18,780 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-24 22:12:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash 42154, now seen corresponding path program 1 times [2021-03-24 22:12:18,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:18,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315337966] [2021-03-24 22:12:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:18,850 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:18,853 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:18,864 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:12:18,864 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:12:18,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:12:18,865 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:12:18,865 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-24 22:12:18,869 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,869 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,869 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,869 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,870 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,870 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,870 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,870 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,871 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,872 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,873 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:12:18,873 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 22:12:18,875 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:12:18,876 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:12:18,876 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:12:18,876 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:12:18,876 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:12:18,876 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:12:18,876 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:12:18,876 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:12:18,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-24 22:12:18,880 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 22:12:18,880 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:18,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 22:12:18,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-03-24 22:12:18,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-03-24 22:12:18,881 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:12:18,882 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-24 22:12:18,882 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-24 22:12:18,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-24 22:12:18,886 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 22:12:18,886 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:18,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 29 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 22:12:18,886 INFO L142 LiptonReduction]: Number of co-enabled transitions 100 [2021-03-24 22:12:18,937 INFO L154 LiptonReduction]: Checked pairs total: 168 [2021-03-24 22:12:18,938 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-24 22:12:18,938 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 57 [2021-03-24 22:12:18,941 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-24 22:12:18,941 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:18,941 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:18,941 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-24 22:12:18,942 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:18,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1896722, now seen corresponding path program 1 times [2021-03-24 22:12:18,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:18,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129133619] [2021-03-24 22:12:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:18,946 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:18,948 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:18,949 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:12:18,949 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:12:18,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 22:12:18,950 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:12:18,951 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-24 22:12:18,955 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,955 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,956 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,956 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,956 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,956 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,957 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,957 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,957 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,957 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,958 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,958 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,958 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,959 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:18,961 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:12:18,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-24 22:12:18,962 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:12:18,962 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:12:18,962 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:12:18,963 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:12:18,963 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:12:18,963 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:12:18,963 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:12:18,963 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:12:18,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-03-24 22:12:18,968 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-24 22:12:18,968 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:18,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 22:12:18,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 21 transitions, 63 flow [2021-03-24 22:12:18,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 63 flow [2021-03-24 22:12:18,969 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:12:18,969 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 21 transitions, 63 flow [2021-03-24 22:12:18,970 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 21 transitions, 63 flow [2021-03-24 22:12:18,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-03-24 22:12:18,974 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-24 22:12:18,974 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:18,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 22:12:18,975 INFO L142 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-24 22:12:19,043 INFO L154 LiptonReduction]: Checked pairs total: 486 [2021-03-24 22:12:19,044 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 22:12:19,044 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 75 [2021-03-24 22:12:19,050 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-24 22:12:19,051 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:19,051 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:19,051 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 22:12:19,051 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:19,052 INFO L82 PathProgramCache]: Analyzing trace with hash 80894512, now seen corresponding path program 1 times [2021-03-24 22:12:19,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:19,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760360960] [2021-03-24 22:12:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:12:19,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:19,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:19,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:19,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:19,143 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:12:19,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:12:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:12:19,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760360960] [2021-03-24 22:12:19,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:12:19,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 22:12:19,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186859124] [2021-03-24 22:12:19,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:12:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:12:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:12:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:12:19,173 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2021-03-24 22:12:19,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:19,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:12:19,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2021-03-24 22:12:19,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:12:19,355 INFO L129 PetriNetUnfolder]: 291/578 cut-off events. [2021-03-24 22:12:19,355 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:19,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 578 events. 291/578 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3168 event pairs, 91 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 1139. Up to 175 conditions per place. [2021-03-24 22:12:19,367 INFO L132 encePairwiseOnDemand]: 13/24 looper letters, 28 selfloop transitions, 14 changer transitions 0/46 dead transitions. [2021-03-24 22:12:19,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 46 transitions, 197 flow [2021-03-24 22:12:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:12:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:12:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2021-03-24 22:12:19,377 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2021-03-24 22:12:19,378 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2021-03-24 22:12:19,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2021-03-24 22:12:19,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:12:19,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2021-03-24 22:12:19,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:19,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:19,386 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:19,387 INFO L185 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 5 states and 83 transitions. [2021-03-24 22:12:19,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 46 transitions, 197 flow [2021-03-24 22:12:19,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 191 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-03-24 22:12:19,393 INFO L241 Difference]: Finished difference. Result has 33 places, 31 transitions, 171 flow [2021-03-24 22:12:19,394 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2021-03-24 22:12:19,395 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2021-03-24 22:12:19,395 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 171 flow [2021-03-24 22:12:19,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:19,395 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:19,396 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 22:12:19,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 22:12:19,396 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:19,396 INFO L82 PathProgramCache]: Analyzing trace with hash 80901459, now seen corresponding path program 1 times [2021-03-24 22:12:19,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:19,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188420073] [2021-03-24 22:12:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:19,401 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:19,403 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:19,405 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:12:19,405 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:12:19,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 22:12:19,405 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:12:19,405 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-24 22:12:19,415 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,415 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,416 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,416 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,416 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,416 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,416 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,417 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,417 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,417 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,417 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,417 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,418 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,418 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,418 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,418 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,419 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,421 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,422 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,423 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:19,424 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:12:19,425 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-24 22:12:19,426 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:12:19,426 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:12:19,426 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:12:19,426 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:12:19,426 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:12:19,426 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:12:19,427 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:12:19,427 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:12:19,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-03-24 22:12:19,439 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-24 22:12:19,439 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:19,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 31 events. 0/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 90 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 22:12:19,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 27 transitions, 86 flow [2021-03-24 22:12:19,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 27 transitions, 86 flow [2021-03-24 22:12:19,442 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:12:19,445 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 27 transitions, 86 flow [2021-03-24 22:12:19,446 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 27 transitions, 86 flow [2021-03-24 22:12:19,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-03-24 22:12:19,449 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-24 22:12:19,449 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:19,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 31 events. 0/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 92 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 22:12:19,450 INFO L142 LiptonReduction]: Number of co-enabled transitions 440 [2021-03-24 22:12:19,544 INFO L154 LiptonReduction]: Checked pairs total: 890 [2021-03-24 22:12:19,544 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 22:12:19,545 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 103 [2021-03-24 22:12:19,547 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-24 22:12:19,547 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:19,547 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:19,548 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 22:12:19,548 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:19,548 INFO L82 PathProgramCache]: Analyzing trace with hash 109667652, now seen corresponding path program 1 times [2021-03-24 22:12:19,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:19,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398603901] [2021-03-24 22:12:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:12:19,561 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:19,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:19,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:19,582 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:19,589 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:12:19,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:12:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:12:19,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398603901] [2021-03-24 22:12:19,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:12:19,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 22:12:19,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575058602] [2021-03-24 22:12:19,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:12:19,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:12:19,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:12:19,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:12:19,602 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-03-24 22:12:19,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-03-24 22:12:19,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:12:19,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-03-24 22:12:19,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:12:20,082 INFO L129 PetriNetUnfolder]: 2852/4507 cut-off events. [2021-03-24 22:12:20,082 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:20,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9029 conditions, 4507 events. 2852/4507 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27924 event pairs, 882 based on Foata normal form. 0/3624 useless extension candidates. Maximal degree in co-relation 8993. Up to 1413 conditions per place. [2021-03-24 22:12:20,124 INFO L132 encePairwiseOnDemand]: 17/31 looper letters, 38 selfloop transitions, 18 changer transitions 0/61 dead transitions. [2021-03-24 22:12:20,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 61 transitions, 266 flow [2021-03-24 22:12:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:12:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:12:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2021-03-24 22:12:20,128 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7032258064516129 [2021-03-24 22:12:20,128 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 109 transitions. [2021-03-24 22:12:20,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 109 transitions. [2021-03-24 22:12:20,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:12:20,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 109 transitions. [2021-03-24 22:12:20,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:20,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:20,133 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:20,133 INFO L185 Difference]: Start difference. First operand has 32 places, 23 transitions, 78 flow. Second operand 5 states and 109 transitions. [2021-03-24 22:12:20,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 61 transitions, 266 flow [2021-03-24 22:12:20,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 61 transitions, 254 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-03-24 22:12:20,136 INFO L241 Difference]: Finished difference. Result has 40 places, 40 transitions, 222 flow [2021-03-24 22:12:20,136 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2021-03-24 22:12:20,136 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2021-03-24 22:12:20,136 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 222 flow [2021-03-24 22:12:20,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-03-24 22:12:20,137 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:20,137 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 22:12:20,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 22:12:20,137 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash -894759565, now seen corresponding path program 1 times [2021-03-24 22:12:20,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:20,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360107134] [2021-03-24 22:12:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:12:20,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:20,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:20,186 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:20,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:20,196 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:12:20,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:12:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 22:12:20,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360107134] [2021-03-24 22:12:20,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:12:20,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 22:12:20,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127001414] [2021-03-24 22:12:20,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:12:20,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:12:20,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:12:20,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:12:20,205 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-03-24 22:12:20,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-03-24 22:12:20,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:12:20,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-03-24 22:12:20,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:12:21,283 INFO L129 PetriNetUnfolder]: 5089/8173 cut-off events. [2021-03-24 22:12:21,283 INFO L130 PetriNetUnfolder]: For 3623/3623 co-relation queries the response was YES. [2021-03-24 22:12:21,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30065 conditions, 8173 events. 5089/8173 cut-off events. For 3623/3623 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 57423 event pairs, 1338 based on Foata normal form. 345/8514 useless extension candidates. Maximal degree in co-relation 30014. Up to 3282 conditions per place. [2021-03-24 22:12:21,381 INFO L132 encePairwiseOnDemand]: 17/31 looper letters, 56 selfloop transitions, 45 changer transitions 0/106 dead transitions. [2021-03-24 22:12:21,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 106 transitions, 789 flow [2021-03-24 22:12:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:12:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:12:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2021-03-24 22:12:21,385 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6838709677419355 [2021-03-24 22:12:21,386 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 106 transitions. [2021-03-24 22:12:21,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 106 transitions. [2021-03-24 22:12:21,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:12:21,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 106 transitions. [2021-03-24 22:12:21,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:21,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:21,389 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:21,389 INFO L185 Difference]: Start difference. First operand has 40 places, 40 transitions, 222 flow. Second operand 5 states and 106 transitions. [2021-03-24 22:12:21,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 106 transitions, 789 flow [2021-03-24 22:12:21,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 106 transitions, 789 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 22:12:21,412 INFO L241 Difference]: Finished difference. Result has 48 places, 81 transitions, 712 flow [2021-03-24 22:12:21,412 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=712, PETRI_PLACES=48, PETRI_TRANSITIONS=81} [2021-03-24 22:12:21,413 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2021-03-24 22:12:21,413 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 81 transitions, 712 flow [2021-03-24 22:12:21,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-03-24 22:12:21,413 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:21,413 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 22:12:21,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 22:12:21,413 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:21,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:21,414 INFO L82 PathProgramCache]: Analyzing trace with hash -894746661, now seen corresponding path program 1 times [2021-03-24 22:12:21,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:21,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246159178] [2021-03-24 22:12:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:21,421 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:21,432 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:21,437 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:12:21,437 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:12:21,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 22:12:21,437 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:12:21,437 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-24 22:12:21,444 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,444 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,444 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,444 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,447 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,447 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,447 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,447 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,448 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,448 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,448 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,448 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,448 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,448 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,449 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,449 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,449 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,449 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,449 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,449 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,450 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,452 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,453 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,454 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,455 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:21,456 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:12:21,456 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-24 22:12:21,457 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:12:21,457 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:12:21,457 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:12:21,457 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:12:21,457 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:12:21,457 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:12:21,457 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:12:21,457 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:12:21,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-03-24 22:12:21,462 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-24 22:12:21,462 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:21,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 116 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 22:12:21,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 33 transitions, 111 flow [2021-03-24 22:12:21,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 33 transitions, 111 flow [2021-03-24 22:12:21,463 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:12:21,463 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 33 transitions, 111 flow [2021-03-24 22:12:21,464 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 33 transitions, 111 flow [2021-03-24 22:12:21,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-03-24 22:12:21,468 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-24 22:12:21,468 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:21,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 139 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 22:12:21,469 INFO L142 LiptonReduction]: Number of co-enabled transitions 700 [2021-03-24 22:12:21,598 INFO L154 LiptonReduction]: Checked pairs total: 1466 [2021-03-24 22:12:21,599 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-24 22:12:21,599 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 136 [2021-03-24 22:12:21,602 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-24 22:12:21,603 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:21,603 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:21,603 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 22:12:21,603 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash 145120927, now seen corresponding path program 1 times [2021-03-24 22:12:21,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:21,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331533164] [2021-03-24 22:12:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:12:21,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:21,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:21,638 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:21,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:21,648 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:12:21,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:12:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:12:21,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331533164] [2021-03-24 22:12:21,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:12:21,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 22:12:21,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826146587] [2021-03-24 22:12:21,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:12:21,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:12:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:12:21,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:12:21,657 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2021-03-24 22:12:21,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2021-03-24 22:12:21,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:12:21,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2021-03-24 22:12:21,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:12:24,380 INFO L129 PetriNetUnfolder]: 22065/31144 cut-off events. [2021-03-24 22:12:24,380 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:24,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62309 conditions, 31144 events. 22065/31144 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1684. Compared 204207 event pairs, 6846 based on Foata normal form. 0/25506 useless extension candidates. Maximal degree in co-relation 62263. Up to 10043 conditions per place. [2021-03-24 22:12:24,750 INFO L132 encePairwiseOnDemand]: 21/38 looper letters, 48 selfloop transitions, 22 changer transitions 0/76 dead transitions. [2021-03-24 22:12:24,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 76 transitions, 337 flow [2021-03-24 22:12:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:12:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:12:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2021-03-24 22:12:24,751 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7105263157894737 [2021-03-24 22:12:24,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2021-03-24 22:12:24,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2021-03-24 22:12:24,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:12:24,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2021-03-24 22:12:24,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:24,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:24,753 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:24,753 INFO L185 Difference]: Start difference. First operand has 39 places, 28 transitions, 101 flow. Second operand 5 states and 135 transitions. [2021-03-24 22:12:24,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 76 transitions, 337 flow [2021-03-24 22:12:24,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 317 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-03-24 22:12:24,755 INFO L241 Difference]: Finished difference. Result has 47 places, 49 transitions, 273 flow [2021-03-24 22:12:24,756 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2021-03-24 22:12:24,756 INFO L343 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2021-03-24 22:12:24,756 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 273 flow [2021-03-24 22:12:24,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2021-03-24 22:12:24,756 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:24,756 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 22:12:24,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 22:12:24,756 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash 204589902, now seen corresponding path program 1 times [2021-03-24 22:12:24,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:24,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954660075] [2021-03-24 22:12:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:12:24,767 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:24,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:24,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:24,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:24,779 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:12:24,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:12:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 22:12:24,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954660075] [2021-03-24 22:12:24,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:12:24,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 22:12:24,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404504596] [2021-03-24 22:12:24,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:12:24,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:12:24,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:12:24,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:12:24,784 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2021-03-24 22:12:24,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2021-03-24 22:12:24,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:12:24,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2021-03-24 22:12:24,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:12:30,162 INFO L129 PetriNetUnfolder]: 41526/59126 cut-off events. [2021-03-24 22:12:30,712 INFO L130 PetriNetUnfolder]: For 24287/24287 co-relation queries the response was YES. [2021-03-24 22:12:31,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 213625 conditions, 59126 events. 41526/59126 cut-off events. For 24287/24287 co-relation queries the response was YES. Maximal size of possible extension queue 3304. Compared 428547 event pairs, 15155 based on Foata normal form. 2010/61115 useless extension candidates. Maximal degree in co-relation 136267. Up to 23529 conditions per place. [2021-03-24 22:12:31,726 INFO L132 encePairwiseOnDemand]: 21/38 looper letters, 70 selfloop transitions, 56 changer transitions 0/132 dead transitions. [2021-03-24 22:12:31,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 132 transitions, 980 flow [2021-03-24 22:12:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:12:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:12:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2021-03-24 22:12:31,728 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6894736842105263 [2021-03-24 22:12:31,728 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 131 transitions. [2021-03-24 22:12:31,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 131 transitions. [2021-03-24 22:12:31,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:12:31,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 131 transitions. [2021-03-24 22:12:31,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:31,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:31,730 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:31,730 INFO L185 Difference]: Start difference. First operand has 47 places, 49 transitions, 273 flow. Second operand 5 states and 131 transitions. [2021-03-24 22:12:31,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 132 transitions, 980 flow [2021-03-24 22:12:31,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 132 transitions, 980 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 22:12:31,925 INFO L241 Difference]: Finished difference. Result has 55 places, 100 transitions, 883 flow [2021-03-24 22:12:31,925 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=883, PETRI_PLACES=55, PETRI_TRANSITIONS=100} [2021-03-24 22:12:31,925 INFO L343 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2021-03-24 22:12:31,925 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 100 transitions, 883 flow [2021-03-24 22:12:31,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2021-03-24 22:12:31,926 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:31,926 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:12:31,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 22:12:31,926 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:31,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2048027829, now seen corresponding path program 1 times [2021-03-24 22:12:31,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:31,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516593465] [2021-03-24 22:12:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:31,934 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:12:31,941 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:12:31,945 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:12:31,945 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:12:31,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 22:12:31,946 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:12:31,946 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-03-24 22:12:31,952 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,953 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,953 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,953 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,953 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,953 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,953 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,953 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,954 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,954 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,954 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,954 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,955 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,955 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,955 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,955 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,955 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,955 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,956 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,956 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,956 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,956 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,956 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,956 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,957 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,969 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,970 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,970 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,971 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,972 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:12:31,972 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:12:31,973 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-03-24 22:12:31,974 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:12:31,974 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:12:31,974 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:12:31,974 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:12:31,974 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:12:31,974 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:12:31,974 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:12:31,974 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:12:31,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-03-24 22:12:31,981 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-24 22:12:31,982 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:31,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 22:12:31,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 39 transitions, 138 flow [2021-03-24 22:12:31,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 138 flow [2021-03-24 22:12:31,983 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:12:31,983 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 39 transitions, 138 flow [2021-03-24 22:12:31,983 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 39 transitions, 138 flow [2021-03-24 22:12:31,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-03-24 22:12:31,987 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-24 22:12:31,987 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:31,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 157 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 22:12:31,988 INFO L142 LiptonReduction]: Number of co-enabled transitions 1020 [2021-03-24 22:12:32,119 INFO L154 LiptonReduction]: Checked pairs total: 2120 [2021-03-24 22:12:32,120 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-24 22:12:32,120 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 138 [2021-03-24 22:12:32,124 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-24 22:12:32,124 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:32,124 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:32,124 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 22:12:32,124 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:32,125 INFO L82 PathProgramCache]: Analyzing trace with hash 187284127, now seen corresponding path program 1 times [2021-03-24 22:12:32,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:32,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022189542] [2021-03-24 22:12:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:12:32,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:32,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:32,157 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:32,158 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:32,165 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:12:32,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:12:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:12:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022189542] [2021-03-24 22:12:32,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:12:32,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 22:12:32,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115239015] [2021-03-24 22:12:32,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:12:32,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:12:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:12:32,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:12:32,170 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-24 22:12:32,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2021-03-24 22:12:32,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:12:32,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-24 22:12:32,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:12:53,774 INFO L129 PetriNetUnfolder]: 151182/199409 cut-off events. [2021-03-24 22:12:53,774 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:12:54,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398846 conditions, 199409 events. 151182/199409 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8130. Compared 1347972 event pairs, 46742 based on Foata normal form. 0/165338 useless extension candidates. Maximal degree in co-relation 398789. Up to 64869 conditions per place. [2021-03-24 22:12:55,749 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 58 selfloop transitions, 26 changer transitions 0/91 dead transitions. [2021-03-24 22:12:55,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 91 transitions, 410 flow [2021-03-24 22:12:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:12:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:12:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2021-03-24 22:12:55,750 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7155555555555555 [2021-03-24 22:12:55,750 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2021-03-24 22:12:55,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2021-03-24 22:12:55,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:12:55,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2021-03-24 22:12:55,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:55,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:55,752 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:12:55,752 INFO L185 Difference]: Start difference. First operand has 46 places, 33 transitions, 126 flow. Second operand 5 states and 161 transitions. [2021-03-24 22:12:55,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 91 transitions, 410 flow [2021-03-24 22:12:55,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 91 transitions, 380 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-03-24 22:12:55,757 INFO L241 Difference]: Finished difference. Result has 54 places, 58 transitions, 324 flow [2021-03-24 22:12:55,757 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2021-03-24 22:12:55,757 INFO L343 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2021-03-24 22:12:55,757 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 324 flow [2021-03-24 22:12:55,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2021-03-24 22:12:55,758 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:12:55,758 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 22:12:55,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 22:12:55,758 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:12:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:12:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1511038456, now seen corresponding path program 1 times [2021-03-24 22:12:55,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:12:55,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212385448] [2021-03-24 22:12:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:12:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:12:55,832 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:55,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:55,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:12:55,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:12:55,843 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:12:55,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:12:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 22:12:55,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212385448] [2021-03-24 22:12:55,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:12:55,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 22:12:55,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351335835] [2021-03-24 22:12:55,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:12:55,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:12:55,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:12:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:12:55,848 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-24 22:12:55,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2021-03-24 22:12:55,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:12:55,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-24 22:12:55,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:15,622 INFO L129 PetriNetUnfolder]: 290971/385945 cut-off events. [2021-03-24 22:14:15,623 INFO L130 PetriNetUnfolder]: For 168541/168541 co-relation queries the response was YES. [2021-03-24 22:14:17,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378680 conditions, 385945 events. 290971/385945 cut-off events. For 168541/168541 co-relation queries the response was YES. Maximal size of possible extension queue 16280. Compared 2835859 event pairs, 77696 based on Foata normal form. 11295/397166 useless extension candidates. Maximal degree in co-relation 995116. Up to 151596 conditions per place. [2021-03-24 22:14:19,355 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 84 selfloop transitions, 67 changer transitions 0/158 dead transitions. [2021-03-24 22:14:19,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 158 transitions, 1171 flow [2021-03-24 22:14:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:14:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:14:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-03-24 22:14:19,361 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2021-03-24 22:14:19,361 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-03-24 22:14:19,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-03-24 22:14:19,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:19,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-03-24 22:14:19,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:14:19,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:14:19,363 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:14:19,363 INFO L185 Difference]: Start difference. First operand has 54 places, 58 transitions, 324 flow. Second operand 5 states and 156 transitions. [2021-03-24 22:14:19,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 158 transitions, 1171 flow [2021-03-24 22:14:20,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 158 transitions, 1171 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:20,977 INFO L241 Difference]: Finished difference. Result has 62 places, 119 transitions, 1054 flow [2021-03-24 22:14:20,977 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1054, PETRI_PLACES=62, PETRI_TRANSITIONS=119} [2021-03-24 22:14:20,977 INFO L343 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2021-03-24 22:14:20,977 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 119 transitions, 1054 flow [2021-03-24 22:14:20,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2021-03-24 22:14:20,978 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:20,978 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:20,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 22:14:20,978 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash -401922614, now seen corresponding path program 1 times [2021-03-24 22:14:20,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:20,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580724345] [2021-03-24 22:14:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:20,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:20,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:14:20,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:20,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:14:20,999 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:14:21,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:14:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-24 22:14:21,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580724345] [2021-03-24 22:14:21,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:21,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 22:14:21,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142179247] [2021-03-24 22:14:21,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:14:21,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:21,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:14:21,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:14:21,003 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-24 22:14:21,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 119 transitions, 1054 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2021-03-24 22:14:21,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:21,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-24 22:14:21,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:18:57,298 INFO L129 PetriNetUnfolder]: 534473/712039 cut-off events. [2021-03-24 22:18:57,299 INFO L130 PetriNetUnfolder]: For 1201646/1201648 co-relation queries the response was YES. [2021-03-24 22:19:00,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3505864 conditions, 712039 events. 534473/712039 cut-off events. For 1201646/1201648 co-relation queries the response was YES. Maximal size of possible extension queue 31035. Compared 5630607 event pairs, 125326 based on Foata normal form. 20284/732260 useless extension candidates. Maximal degree in co-relation 3505833. Up to 279467 conditions per place. [2021-03-24 22:19:05,153 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 114 selfloop transitions, 152 changer transitions 0/273 dead transitions. [2021-03-24 22:19:05,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 273 transitions, 2951 flow [2021-03-24 22:19:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:19:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:19:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-03-24 22:19:05,160 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2021-03-24 22:19:05,160 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-03-24 22:19:05,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-03-24 22:19:05,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:19:05,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-03-24 22:19:05,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:19:05,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:19:05,162 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:19:05,162 INFO L185 Difference]: Start difference. First operand has 62 places, 119 transitions, 1054 flow. Second operand 5 states and 156 transitions. [2021-03-24 22:19:05,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 273 transitions, 2951 flow [2021-03-24 22:19:12,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 273 transitions, 2951 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 22:19:12,975 INFO L241 Difference]: Finished difference. Result has 69 places, 228 transitions, 2731 flow [2021-03-24 22:19:12,975 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2731, PETRI_PLACES=69, PETRI_TRANSITIONS=228} [2021-03-24 22:19:12,975 INFO L343 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2021-03-24 22:19:12,976 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 228 transitions, 2731 flow [2021-03-24 22:19:12,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2021-03-24 22:19:12,976 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:12,976 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:19:12,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-24 22:19:12,976 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:12,976 INFO L82 PathProgramCache]: Analyzing trace with hash 219245625, now seen corresponding path program 1 times [2021-03-24 22:19:12,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:12,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505286501] [2021-03-24 22:19:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:12,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:12,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:19:12,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:12,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:19:12,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:12,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:19:12,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:12,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:19:13,005 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:19:13,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:19:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 22:19:13,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505286501] [2021-03-24 22:19:13,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:13,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:19:13,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958331347] [2021-03-24 22:19:13,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 22:19:13,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:19:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 22:19:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 22:19:13,008 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2021-03-24 22:19:13,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 228 transitions, 2731 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:19:13,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:19:13,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2021-03-24 22:19:13,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown [2021-03-24 22:24:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 22:24:19,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-24 22:24:19,661 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-24 22:24:19,677 WARN L224 ceAbstractionStarter]: Timeout [2021-03-24 22:24:19,678 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:24:19 BasicIcfg [2021-03-24 22:24:19,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:24:19,678 INFO L168 Benchmark]: Toolchain (without parser) took 721504.56 ms. Allocated memory was 255.9 MB in the beginning and 14.9 GB in the end (delta: 14.7 GB). Free memory was 236.7 MB in the beginning and 7.2 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.2 GB. Max. memory is 16.0 GB. [2021-03-24 22:24:19,679 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 179.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:24:19,680 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 22:24:19,681 INFO L168 Benchmark]: Boogie Preprocessor took 11.91 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 860.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:24:19,682 INFO L168 Benchmark]: RCFGBuilder took 188.09 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 240.4 MB in the end (delta: -6.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-24 22:24:19,682 INFO L168 Benchmark]: TraceAbstraction took 721270.08 ms. Allocated memory was 255.9 MB in the beginning and 14.9 GB in the end (delta: 14.7 GB). Free memory was 240.4 MB in the beginning and 7.2 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.2 GB. Max. memory is 16.0 GB. [2021-03-24 22:24:19,684 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 179.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.91 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 860.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 188.09 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 240.4 MB in the end (delta: -6.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 721270.08 ms. Allocated memory was 255.9 MB in the beginning and 14.9 GB in the end (delta: 14.7 GB). Free memory was 240.4 MB in the beginning and 7.2 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 213.2ms, 12 PlacesBefore, 9 PlacesAfterwards, 9 TransitionsBefore, 6 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 8 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 55.6ms, 20 PlacesBefore, 18 PlacesAfterwards, 15 TransitionsBefore, 13 TransitionsAfterwards, 100 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 168 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 78, positive: 56, positive conditional: 0, positive unconditional: 56, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 55, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 55, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 55, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 34, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 78, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 55, unknown conditional: 0, unknown unconditional: 55] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 74.1ms, 28 PlacesBefore, 25 PlacesAfterwards, 21 TransitionsBefore, 18 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 486 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 121, positive: 84, positive conditional: 0, positive unconditional: 84, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 85, positive: 67, positive conditional: 0, positive unconditional: 67, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 85, positive: 67, positive conditional: 0, positive unconditional: 67, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 85, positive: 67, positive conditional: 0, positive unconditional: 67, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 39, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 121, positive: 17, positive conditional: 0, positive unconditional: 17, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 85, unknown conditional: 0, unknown unconditional: 85] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 98.3ms, 36 PlacesBefore, 32 PlacesAfterwards, 27 TransitionsBefore, 23 TransitionsAfterwards, 440 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 890 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 270, positive: 222, positive conditional: 0, positive unconditional: 222, negative: 48, negative conditional: 0, negative unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 192, positive: 160, positive conditional: 0, positive unconditional: 160, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 192, positive: 160, positive conditional: 0, positive unconditional: 160, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 192, positive: 160, positive conditional: 0, positive unconditional: 160, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 32, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 63, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 63, negative conditional: 0, negative unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 270, positive: 62, positive conditional: 0, positive unconditional: 62, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 192, unknown conditional: 0, unknown unconditional: 192] , Statistics on independence cache: Total cache size (in pairs): 79, Positive cache size: 58, Positive conditional cache size: 0, Positive unconditional cache size: 58, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 135.1ms, 44 PlacesBefore, 39 PlacesAfterwards, 33 TransitionsBefore, 28 TransitionsAfterwards, 700 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 1466 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 320, positive: 259, positive conditional: 0, positive unconditional: 259, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 250, positive: 211, positive conditional: 0, positive unconditional: 211, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 250, positive: 211, positive conditional: 0, positive unconditional: 211, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 250, positive: 211, positive conditional: 0, positive unconditional: 211, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 39, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 82, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 82, negative conditional: 0, negative unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 320, positive: 48, positive conditional: 0, positive unconditional: 48, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 250, unknown conditional: 0, unknown unconditional: 250] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 31, Negative conditional cache size: 0, Negative unconditional cache size: 31 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 136.6ms, 52 PlacesBefore, 46 PlacesAfterwards, 39 TransitionsBefore, 33 TransitionsAfterwards, 1020 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 2120 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 491, positive: 419, positive conditional: 0, positive unconditional: 419, negative: 72, negative conditional: 0, negative unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 389, positive: 338, positive conditional: 0, positive unconditional: 338, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 389, positive: 338, positive conditional: 0, positive unconditional: 338, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 389, positive: 338, positive conditional: 0, positive unconditional: 338, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 51, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 87, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 87, negative conditional: 0, negative unconditional: 87, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 491, positive: 81, positive conditional: 0, positive unconditional: 81, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 389, unknown conditional: 0, unknown unconditional: 389] , Statistics on independence cache: Total cache size (in pairs): 165, Positive cache size: 123, Positive conditional cache size: 0, Positive unconditional cache size: 123, Negative cache size: 42, Negative conditional cache size: 0, Negative unconditional cache size: 42 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 19). Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (5states, 12/45 universal loopers) in iteration 4,while PetriNetUnfolder was constructing finite prefix that currently has 4830988 conditions, 831399 events (631232/831398 cut-off events. For 2430179/2430179 co-relation queries the response was YES. Maximal size of possible extension queue 40789. Compared 6643941 event pairs, 161541 based on Foata normal form. 12697/861755 useless extension candidates. Maximal degree in co-relation 4830916. Up to 318664 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 9 locations, 1 error locations. Started 6 CEGAR loops. EmptinessCheckTime: 14.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 721074.2ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 719558.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 829.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 283 SDtfs, 352 SDslu, 193 SDs, 0 SdLazy, 580 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 457.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 233.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2731occurred in iteration=3, InterpolantAutomatonStates: 40, 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: 12.2ms SsaConstructionTime, 54.6ms SatisfiabilityAnalysisTime, 404.4ms InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 308 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 7/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout !SESSION 2021-03-24 22:12:16.473 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.9.1 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl Command-line arguments: -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl !ENTRY org.eclipse.osgi 4 0 2021-03-24 22:24:19.972 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30b90f2cd/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30b90f2cd/.metadata/.log.