/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:09:39,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:09:39,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:09:39,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 03:09:39,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 03:09:39,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 03:09:39,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 03:09:39,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 03:09:39,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 03:09:39,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 03:09:39,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 03:09:39,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 03:09:39,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 03:09:39,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 03:09:39,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 03:09:39,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 03:09:39,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 03:09:39,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 03:09:39,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 03:09:39,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 03:09:39,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 03:09:39,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 03:09:39,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 03:09:39,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 03:09:39,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 03:09:39,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 03:09:39,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 03:09:39,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 03:09:39,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:09:39,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:09:39,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:09:39,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:09:39,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:09:39,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:09:39,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:09:39,194 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:09:39,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:09:39,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:09:39,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:09:39,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:09:39,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:09:39,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:09:39,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:09:39,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:09:39,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:09:39,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:09:39,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:09:39,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:09:39,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:09:39,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:09:39,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:09:39,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:09:39,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:09:39,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:09:39,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:09:39,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:09:39,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:09:39,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:09:39,198 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:09:39,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:09:39,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:09:39,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:09:39,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:09:39,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:09:39,480 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:09:39,481 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:09:39,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl [2021-06-05 03:09:39,482 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl' [2021-06-05 03:09:39,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:09:39,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:09:39,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:09:39,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:09:39,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:09:39,534 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 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,543 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 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:09:39,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:09:39,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:09:39,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:09:39,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/1) ... [2021-06-05 03:09:39,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:09:39,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:09:39,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:09:39,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:09:39,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:09:39,634 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:09:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:09:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:09:39,635 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-05 03:09:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-05 03:09:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-05 03:09:39,636 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:09:39,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:09:39,746 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-05 03:09:39,748 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:09:39 BoogieIcfgContainer [2021-06-05 03:09:39,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:09:39,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:09:39,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:09:39,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:09:39,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:39" (1/2) ... [2021-06-05 03:09:39,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d871c0c and model type fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:09:39, skipping insertion in model container [2021-06-05 03:09:39,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:09:39" (2/2) ... [2021-06-05 03:09:39,755 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_local.bpl [2021-06-05 03:09:39,764 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:09:39,764 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:09:39,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:09:39,766 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:09:39,791 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:39,792 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:39,792 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:39,793 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:39,797 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:39,801 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:39,820 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:09:39,847 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:39,847 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:39,847 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:39,847 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:39,847 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:39,847 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:39,847 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:39,847 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:39,858 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 12 places, 9 transitions, 23 flow [2021-06-05 03:09:39,867 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 21 states, 16 states have (on average 1.875) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.875) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-06-05 03:09:39,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:39,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-06-05 03:09:39,877 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:09:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash 42154, now seen corresponding path program 1 times [2021-06-05 03:09:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:39,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637327603] [2021-06-05 03:09:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:39,963 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:39,973 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:39,988 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:39,989 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:39,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:09:39,990 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:39,990 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-05 03:09:39,998 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:39,999 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:39,999 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,000 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,003 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,003 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,004 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,004 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,006 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,009 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,012 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:40,012 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 03:09:40,017 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:40,018 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:40,018 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:40,018 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:40,018 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:40,018 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:40,018 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:40,018 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:40,021 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-06-05 03:09:40,037 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 123 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 122 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 122 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 03:09:40,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:40,040 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 03:09:40,040 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1773586, now seen corresponding path program 1 times [2021-06-05 03:09:40,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:40,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555884809] [2021-06-05 03:09:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:40,053 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:40,055 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:40,056 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:40,056 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:40,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:09:40,057 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:40,057 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-05 03:09:40,082 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,083 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,083 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,083 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,083 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,083 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,084 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,084 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,084 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,084 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,084 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,085 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,085 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,087 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,089 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,091 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:40,092 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 03:09:40,093 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:40,093 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:40,093 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:40,093 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:40,093 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:40,093 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:40,093 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:40,093 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:40,094 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 21 transitions, 63 flow [2021-06-05 03:09:40,145 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 735 states, 712 states have (on average 3.186797752808989) internal successors, (2269), 734 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 735 states, 712 states have (on average 3.186797752808989) internal successors, (2269), 734 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:09:40,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:40,148 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:09:40,148 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:40,149 INFO L82 PathProgramCache]: Analyzing trace with hash 75168682, now seen corresponding path program 1 times [2021-06-05 03:09:40,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:40,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531844241] [2021-06-05 03:09:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:09:40,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:40,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531844241] [2021-06-05 03:09:40,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531844241] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:40,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:40,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:09:40,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350488823] [2021-06-05 03:09:40,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:40,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:40,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:40,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:40,321 INFO L87 Difference]: Start difference. First operand has 735 states, 712 states have (on average 3.186797752808989) internal successors, (2269), 734 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:40,491 INFO L93 Difference]: Finished difference Result 1725 states and 4897 transitions. [2021-06-05 03:09:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:09:40,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 03:09:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:40,532 INFO L225 Difference]: With dead ends: 1725 [2021-06-05 03:09:40,532 INFO L226 Difference]: Without dead ends: 1629 [2021-06-05 03:09:40,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-06-05 03:09:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 993. [2021-06-05 03:09:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 975 states have (on average 3.0574358974358975) internal successors, (2981), 992 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2981 transitions. [2021-06-05 03:09:40,690 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2981 transitions. Word has length 5 [2021-06-05 03:09:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:40,690 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 2981 transitions. [2021-06-05 03:09:40,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2981 transitions. [2021-06-05 03:09:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:09:40,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:40,691 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:09:40,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:09:40,692 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:40,693 INFO L82 PathProgramCache]: Analyzing trace with hash 75175629, now seen corresponding path program 1 times [2021-06-05 03:09:40,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:40,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490237578] [2021-06-05 03:09:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:40,701 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:40,703 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:40,704 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:40,705 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:40,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:09:40,706 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:40,706 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-05 03:09:40,713 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,714 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,714 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,714 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,714 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,715 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,715 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,715 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,715 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,715 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,720 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,721 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,721 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,721 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,721 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,721 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,722 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,725 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,726 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,727 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:40,728 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:40,728 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 03:09:40,729 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:40,729 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:40,729 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:40,729 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:40,730 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:40,730 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:40,730 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:40,730 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:40,731 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 27 transitions, 86 flow [2021-06-05 03:09:40,976 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4407 states, 4360 states have (on average 3.963532110091743) internal successors, (17281), 4406 states have internal predecessors, (17281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 4407 states, 4360 states have (on average 3.963532110091743) internal successors, (17281), 4406 states have internal predecessors, (17281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:09:40,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:40,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:09:40,993 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash 101078907, now seen corresponding path program 1 times [2021-06-05 03:09:40,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:40,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757963832] [2021-06-05 03:09:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:09:41,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757963832] [2021-06-05 03:09:41,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757963832] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:41,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:41,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:09:41,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310729390] [2021-06-05 03:09:41,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:41,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:41,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:41,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:41,078 INFO L87 Difference]: Start difference. First operand has 4407 states, 4360 states have (on average 3.963532110091743) internal successors, (17281), 4406 states have internal predecessors, (17281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:41,327 INFO L93 Difference]: Finished difference Result 12381 states and 44365 transitions. [2021-06-05 03:09:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:09:41,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 03:09:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:41,433 INFO L225 Difference]: With dead ends: 12381 [2021-06-05 03:09:41,433 INFO L226 Difference]: Without dead ends: 12072 [2021-06-05 03:09:41,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12072 states. [2021-06-05 03:09:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12072 to 6974. [2021-06-05 03:09:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6974 states, 6933 states have (on average 3.8049906245492573) internal successors, (26380), 6973 states have internal predecessors, (26380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6974 states to 6974 states and 26380 transitions. [2021-06-05 03:09:41,957 INFO L78 Accepts]: Start accepts. Automaton has 6974 states and 26380 transitions. Word has length 5 [2021-06-05 03:09:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:41,958 INFO L482 AbstractCegarLoop]: Abstraction has 6974 states and 26380 transitions. [2021-06-05 03:09:41,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6974 states and 26380 transitions. [2021-06-05 03:09:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 03:09:41,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:41,959 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 03:09:41,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:09:41,960 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:41,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1160997765, now seen corresponding path program 1 times [2021-06-05 03:09:41,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:41,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171688341] [2021-06-05 03:09:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:41,967 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:41,976 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:41,981 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:41,981 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:41,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 03:09:41,982 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:41,982 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-05 03:09:41,989 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,991 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,992 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,992 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,993 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,998 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,998 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,998 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,999 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,999 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,999 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:41,999 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,000 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,000 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,000 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,000 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,003 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,004 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,004 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,004 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,004 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,007 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,008 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,009 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,010 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:42,010 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:42,011 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 03:09:42,012 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:42,012 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:42,012 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:42,013 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:42,013 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:42,013 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:42,013 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:42,013 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:42,016 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 33 transitions, 111 flow [2021-06-05 03:09:45,307 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26439 states, 26344 states have (on average 4.771978439113271) internal successors, (125713), 26438 states have internal predecessors, (125713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 26439 states, 26344 states have (on average 4.771978439113271) internal successors, (125713), 26438 states have internal predecessors, (125713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:09:45,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:45,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:09:45,357 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 132714962, now seen corresponding path program 1 times [2021-06-05 03:09:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:45,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618150912] [2021-06-05 03:09:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:09:45,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:45,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618150912] [2021-06-05 03:09:45,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618150912] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:45,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:45,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:09:45,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544106786] [2021-06-05 03:09:45,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:45,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:45,453 INFO L87 Difference]: Start difference. First operand has 26439 states, 26344 states have (on average 4.771978439113271) internal successors, (125713), 26438 states have internal predecessors, (125713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:46,365 INFO L93 Difference]: Finished difference Result 82189 states and 355977 transitions. [2021-06-05 03:09:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:09:46,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 03:09:46,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:47,132 INFO L225 Difference]: With dead ends: 82189 [2021-06-05 03:09:47,132 INFO L226 Difference]: Without dead ends: 81235 [2021-06-05 03:09:47,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81235 states. [2021-06-05 03:09:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81235 to 46277. [2021-06-05 03:09:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46189 states have (on average 4.551689796271839) internal successors, (210238), 46276 states have internal predecessors, (210238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 210238 transitions. [2021-06-05 03:09:50,393 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 210238 transitions. Word has length 5 [2021-06-05 03:09:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:50,393 INFO L482 AbstractCegarLoop]: Abstraction has 46277 states and 210238 transitions. [2021-06-05 03:09:50,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 210238 transitions. [2021-06-05 03:09:50,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 03:09:50,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:50,422 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 03:09:50,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 03:09:50,423 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash -179995026, now seen corresponding path program 1 times [2021-06-05 03:09:50,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:50,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654766245] [2021-06-05 03:09:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:09:50,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:50,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654766245] [2021-06-05 03:09:50,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654766245] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:50,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:50,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:09:50,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255213028] [2021-06-05 03:09:50,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:50,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:50,507 INFO L87 Difference]: Start difference. First operand 46277 states and 210238 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:51,772 INFO L93 Difference]: Finished difference Result 104662 states and 453119 transitions. [2021-06-05 03:09:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:09:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-06-05 03:09:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:52,328 INFO L225 Difference]: With dead ends: 104662 [2021-06-05 03:09:52,328 INFO L226 Difference]: Without dead ends: 104193 [2021-06-05 03:09:52,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104193 states. [2021-06-05 03:09:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104193 to 55726. [2021-06-05 03:09:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55726 states, 55638 states have (on average 4.55136777022898) internal successors, (253229), 55725 states have internal predecessors, (253229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55726 states to 55726 states and 253229 transitions. [2021-06-05 03:09:55,846 INFO L78 Accepts]: Start accepts. Automaton has 55726 states and 253229 transitions. Word has length 6 [2021-06-05 03:09:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:55,846 INFO L482 AbstractCegarLoop]: Abstraction has 55726 states and 253229 transitions. [2021-06-05 03:09:55,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 55726 states and 253229 transitions. [2021-06-05 03:09:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:09:55,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:55,848 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:55,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:09:55,848 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:55,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1284170360, now seen corresponding path program 1 times [2021-06-05 03:09:55,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:55,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174828605] [2021-06-05 03:09:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:55,854 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:55,856 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:55,859 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:55,859 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:55,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 03:09:55,859 WARN L242 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:55,859 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-05 03:09:55,870 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,871 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,871 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,871 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,871 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,871 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,872 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,872 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,872 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,872 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,872 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,872 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,872 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,873 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,873 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,873 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,873 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,873 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,873 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,873 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,873 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,874 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,874 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,874 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,874 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,876 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,877 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,878 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,882 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,883 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:09:55,883 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:55,884 INFO L255 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-06-05 03:09:55,884 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:55,884 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:55,885 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:55,885 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:55,885 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:55,885 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:55,885 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:55,885 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:55,886 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 39 transitions, 138 flow [2021-06-05 03:12:02,341 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 158631 states, 158440 states have (on average 5.594957081545064) internal successors, (886465), 158630 states have internal predecessors, (886465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:12:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 158631 states, 158440 states have (on average 5.594957081545064) internal successors, (886465), 158630 states have internal predecessors, (886465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:12:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:12:02,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:12:02,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:12:02,587 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:12:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:12:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash 170106637, now seen corresponding path program 1 times [2021-06-05 03:12:02,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:12:02,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498022795] [2021-06-05 03:12:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:12:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:12:02,877 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2021-06-05 03:12:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:12:02,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:12:02,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498022795] [2021-06-05 03:12:02,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498022795] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:12:02,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:12:02,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:12:02,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296249298] [2021-06-05 03:12:02,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:12:02,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:12:02,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:12:02,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:12:03,260 INFO L87 Difference]: Start difference. First operand has 158631 states, 158440 states have (on average 5.594957081545064) internal successors, (886465), 158630 states have internal predecessors, (886465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:12:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:12:09,337 INFO L93 Difference]: Finished difference Result 523661 states and 2660297 transitions. [2021-06-05 03:12:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:12:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 03:12:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:12:12,655 INFO L225 Difference]: With dead ends: 523661 [2021-06-05 03:12:12,655 INFO L226 Difference]: Without dead ends: 520766 [2021-06-05 03:12:12,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:12:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520766 states. [2021-06-05 03:12:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520766 to 297466. [2021-06-05 03:12:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297466 states, 297283 states have (on average 5.295597124625357) internal successors, (1574291), 297465 states have internal predecessors, (1574291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:12:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297466 states to 297466 states and 1574291 transitions. [2021-06-05 03:12:43,114 INFO L78 Accepts]: Start accepts. Automaton has 297466 states and 1574291 transitions. Word has length 5 [2021-06-05 03:12:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:12:43,114 INFO L482 AbstractCegarLoop]: Abstraction has 297466 states and 1574291 transitions. [2021-06-05 03:12:43,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:12:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 297466 states and 1574291 transitions. [2021-06-05 03:12:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 03:12:43,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:12:43,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 03:12:43,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 03:12:43,115 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:12:43,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:12:43,115 INFO L82 PathProgramCache]: Analyzing trace with hash 978536248, now seen corresponding path program 1 times [2021-06-05 03:12:43,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:12:43,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418954228] [2021-06-05 03:12:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:12:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:12:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:12:43,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:12:43,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418954228] [2021-06-05 03:12:43,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418954228] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:12:43,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:12:43,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:12:43,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338993300] [2021-06-05 03:12:43,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:12:43,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:12:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:12:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:12:43,150 INFO L87 Difference]: Start difference. First operand 297466 states and 1574291 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:12:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:12:51,794 INFO L93 Difference]: Finished difference Result 675048 states and 3430058 transitions. [2021-06-05 03:12:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:12:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-06-05 03:12:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:12:56,465 INFO L225 Difference]: With dead ends: 675048 [2021-06-05 03:12:56,465 INFO L226 Difference]: Without dead ends: 673610 [2021-06-05 03:12:56,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:13:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673610 states. [2021-06-05 03:13:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673610 to 359773. [2021-06-05 03:13:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359773 states, 359590 states have (on average 5.301006702077366) internal successors, (1906189), 359772 states have internal predecessors, (1906189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359773 states to 359773 states and 1906189 transitions. [2021-06-05 03:13:34,612 INFO L78 Accepts]: Start accepts. Automaton has 359773 states and 1906189 transitions. Word has length 6 [2021-06-05 03:13:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:34,613 INFO L482 AbstractCegarLoop]: Abstraction has 359773 states and 1906189 transitions. [2021-06-05 03:13:34,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 359773 states and 1906189 transitions. [2021-06-05 03:13:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:13:34,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:34,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:34,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 03:13:34,615 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:34,615 INFO L82 PathProgramCache]: Analyzing trace with hash 270378104, now seen corresponding path program 1 times [2021-06-05 03:13:34,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:34,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755881117] [2021-06-05 03:13:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:13:34,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:34,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755881117] [2021-06-05 03:13:34,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755881117] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:34,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:34,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:13:34,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742757608] [2021-06-05 03:13:34,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:13:34,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:13:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:13:34,711 INFO L87 Difference]: Start difference. First operand 359773 states and 1906189 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:48,209 INFO L93 Difference]: Finished difference Result 825165 states and 4206398 transitions. [2021-06-05 03:13:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:13:48,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 03:13:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:57,787 INFO L225 Difference]: With dead ends: 825165 [2021-06-05 03:13:57,787 INFO L226 Difference]: Without dead ends: 823264 [2021-06-05 03:13:57,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:14:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823264 states. [2021-06-05 03:14:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823264 to 437066. [2021-06-05 03:14:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437066 states, 436883 states have (on average 5.306926568440521) internal successors, (2318506), 437065 states have internal predecessors, (2318506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:14:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437066 states to 437066 states and 2318506 transitions. [2021-06-05 03:14:50,002 INFO L78 Accepts]: Start accepts. Automaton has 437066 states and 2318506 transitions. Word has length 7 [2021-06-05 03:14:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:14:50,002 INFO L482 AbstractCegarLoop]: Abstraction has 437066 states and 2318506 transitions. [2021-06-05 03:14:50,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:14:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 437066 states and 2318506 transitions. [2021-06-05 03:14:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:14:50,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:14:50,005 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:14:50,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 03:14:50,006 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:14:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:14:50,006 INFO L82 PathProgramCache]: Analyzing trace with hash -414268605, now seen corresponding path program 1 times [2021-06-05 03:14:50,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:14:50,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997740093] [2021-06-05 03:14:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:14:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:14:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:14:50,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:14:50,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997740093] [2021-06-05 03:14:50,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997740093] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:14:50,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:14:50,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:14:50,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769154943] [2021-06-05 03:14:50,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:14:50,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:14:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:14:50,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:14:50,124 INFO L87 Difference]: Start difference. First operand 437066 states and 2318506 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)