/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_mutex.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 19:51:21,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 19:51:21,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 19:51:21,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 19:51:21,241 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 [2021-05-21 19:51:21,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 19:51:21,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 19:51:21,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 19:51:21,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 19:51:21,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 19:51:21,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 19:51:21,270 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 19:51:21,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 19:51:21,271 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 19:51:21,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 19:51:21,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 19:51:21,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 19:51:21,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 19:51:21,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 19:51:21,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 19:51:21,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 19:51:21,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 19:51:21,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 19:51:21,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 19:51:21,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 19:51:21,273 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 19:51:21,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 19:51:21,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 19:51:21,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 19:51:21,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 19:51:21,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 19:51:21,525 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 19:51:21,526 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 19:51:21,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl [2021-05-21 19:51:21,527 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl' [2021-05-21 19:51:21,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 19:51:21,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 19:51:21,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 19:51:21,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 19:51:21,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 19:51:21,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 19:51:21,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 19:51:21,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 19:51:21,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 19:51:21,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... [2021-05-21 19:51:21,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 19:51:21,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 19:51:21,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 19:51:21,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 19:51:21,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 19:51:21,665 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 19:51:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 19:51:21,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 19:51:21,666 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-05-21 19:51:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-05-21 19:51:21,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-05-21 19:51:21,667 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 19:51:21,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 19:51:21,771 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-21 19:51:21,772 INFO L202 PluginConnector]: Adding new model fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 07:51:21 BoogieIcfgContainer [2021-05-21 19:51:21,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 19:51:21,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 19:51:21,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 19:51:21,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 19:51:21,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:51:21" (1/2) ... [2021-05-21 19:51:21,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c24544 and model type fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 07:51:21, skipping insertion in model container [2021-05-21 19:51:21,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 07:51:21" (2/2) ... [2021-05-21 19:51:21,777 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_mutex.bpl [2021-05-21 19:51:21,781 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 19:51:21,781 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 19:51:21,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 19:51:21,782 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 19:51:21,797 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:51:21,811 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 19:51:21,838 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:51:21,838 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:51:21,838 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:51:21,838 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:51:21,838 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:51:21,839 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:51:21,839 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:51:21,839 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:51:21,845 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 9 transitions, 23 flow [2021-05-21 19:51:21,852 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-05-21 19:51:21,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:21,858 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-05-21 19:51:21,858 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-21 19:51:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash 45133, now seen corresponding path program 1 times [2021-05-21 19:51:21,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:21,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538057356] [2021-05-21 19:51:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:21,929 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:21,936 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:21,946 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:51:21,947 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:51:21,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 19:51:21,948 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:51:21,949 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-05-21 19:51:21,961 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:51:21,961 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 19:51:21,964 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:51:21,964 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:51:21,964 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:51:21,964 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:51:21,965 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:51:21,965 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:51:21,965 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:51:21,965 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:51:21,966 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 42 flow [2021-05-21 19:51:21,975 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 88 states, 77 states have (on average 2.896103896103896) internal successors, (223), 87 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 77 states have (on average 2.896103896103896) internal successors, (223), 87 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-21 19:51:21,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:21,976 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-21 19:51:21,976 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1865938, now seen corresponding path program 1 times [2021-05-21 19:51:21,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:21,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17987005] [2021-05-21 19:51:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:21,989 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:21,993 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:21,996 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:51:21,996 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:51:21,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 19:51:21,996 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:51:21,996 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-05-21 19:51:22,011 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:51:22,012 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-21 19:51:22,013 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:51:22,013 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:51:22,013 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:51:22,014 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:51:22,014 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:51:22,014 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:51:22,014 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:51:22,014 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:51:22,016 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 63 flow [2021-05-21 19:51:22,045 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 415 states have (on average 3.730120481927711) internal successors, (1548), 437 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 415 states have (on average 3.730120481927711) internal successors, (1548), 437 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-21 19:51:22,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:22,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-21 19:51:22,048 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2517147, now seen corresponding path program 1 times [2021-05-21 19:51:22,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:22,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169727399] [2021-05-21 19:51:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:22,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:22,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169727399] [2021-05-21 19:51:22,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169727399] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:51:22,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:51:22,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 19:51:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504875218] [2021-05-21 19:51:22,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 19:51:22,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 19:51:22,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:51:22,164 INFO L87 Difference]: Start difference. First operand has 438 states, 415 states have (on average 3.730120481927711) internal successors, (1548), 437 states have internal predecessors, (1548), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:22,297 INFO L93 Difference]: Finished difference Result 1150 states and 3931 transitions. [2021-05-21 19:51:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 19:51:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-05-21 19:51:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:22,317 INFO L225 Difference]: With dead ends: 1150 [2021-05-21 19:51:22,317 INFO L226 Difference]: Without dead ends: 1126 [2021-05-21 19:51:22,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:51:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-05-21 19:51:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1046. [2021-05-21 19:51:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1028 states have (on average 3.622568093385214) internal successors, (3724), 1045 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3724 transitions. [2021-05-21 19:51:22,415 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3724 transitions. Word has length 4 [2021-05-21 19:51:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:22,415 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 3724 transitions. [2021-05-21 19:51:22,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3724 transitions. [2021-05-21 19:51:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 19:51:22,416 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:22,416 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 19:51:22,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 19:51:22,416 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash 78038544, now seen corresponding path program 1 times [2021-05-21 19:51:22,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:22,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772184346] [2021-05-21 19:51:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:22,420 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:22,422 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:22,422 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:51:22,423 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:51:22,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 19:51:22,423 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:51:22,424 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-05-21 19:51:22,429 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:51:22,430 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-05-21 19:51:22,430 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:51:22,430 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:51:22,431 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:51:22,431 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:51:22,431 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:51:22,431 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:51:22,431 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:51:22,431 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:51:22,431 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 86 flow [2021-05-21 19:51:22,513 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2188 states, 2141 states have (on average 4.634750116767865) internal successors, (9923), 2187 states have internal predecessors, (9923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 2188 states, 2141 states have (on average 4.634750116767865) internal successors, (9923), 2187 states have internal predecessors, (9923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-21 19:51:22,520 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:22,520 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-21 19:51:22,521 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:22,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:22,521 INFO L82 PathProgramCache]: Analyzing trace with hash 3352960, now seen corresponding path program 1 times [2021-05-21 19:51:22,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:22,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293210565] [2021-05-21 19:51:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:22,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:22,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293210565] [2021-05-21 19:51:22,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293210565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:51:22,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:51:22,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 19:51:22,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721575393] [2021-05-21 19:51:22,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 19:51:22,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 19:51:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:51:22,545 INFO L87 Difference]: Start difference. First operand has 2188 states, 2141 states have (on average 4.634750116767865) internal successors, (9923), 2187 states have internal predecessors, (9923), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:22,655 INFO L93 Difference]: Finished difference Result 6142 states and 26589 transitions. [2021-05-21 19:51:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 19:51:22,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-05-21 19:51:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:22,695 INFO L225 Difference]: With dead ends: 6142 [2021-05-21 19:51:22,695 INFO L226 Difference]: Without dead ends: 6104 [2021-05-21 19:51:22,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:51:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2021-05-21 19:51:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 5838. [2021-05-21 19:51:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5797 states have (on average 4.474038295670174) internal successors, (25936), 5837 states have internal predecessors, (25936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 25936 transitions. [2021-05-21 19:51:22,976 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 25936 transitions. Word has length 4 [2021-05-21 19:51:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:22,976 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 25936 transitions. [2021-05-21 19:51:22,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 25936 transitions. [2021-05-21 19:51:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-05-21 19:51:22,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:22,979 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-05-21 19:51:22,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 19:51:22,979 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1072247397, now seen corresponding path program 1 times [2021-05-21 19:51:22,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:22,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548858440] [2021-05-21 19:51:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:22,989 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:22,996 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:22,998 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:51:22,998 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:51:22,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 19:51:22,998 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:51:22,998 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-05-21 19:51:23,010 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:51:23,010 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-05-21 19:51:23,012 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:51:23,012 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:51:23,012 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:51:23,012 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:51:23,012 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:51:23,012 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:51:23,012 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:51:23,012 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:51:23,013 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 33 transitions, 111 flow [2021-05-21 19:51:23,840 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10938 states, 10843 states have (on average 5.584063451074426) internal successors, (60548), 10937 states have internal predecessors, (60548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 10938 states, 10843 states have (on average 5.584063451074426) internal successors, (60548), 10937 states have internal predecessors, (60548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-21 19:51:23,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:23,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-21 19:51:23,865 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash 4373477, now seen corresponding path program 1 times [2021-05-21 19:51:23,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:23,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776093793] [2021-05-21 19:51:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:23,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:23,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776093793] [2021-05-21 19:51:23,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776093793] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:51:23,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:51:23,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 19:51:23,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811101897] [2021-05-21 19:51:23,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 19:51:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 19:51:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:51:23,911 INFO L87 Difference]: Start difference. First operand has 10938 states, 10843 states have (on average 5.584063451074426) internal successors, (60548), 10937 states have internal predecessors, (60548), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:24,488 INFO L93 Difference]: Finished difference Result 31662 states and 166199 transitions. [2021-05-21 19:51:24,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 19:51:24,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-05-21 19:51:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:24,882 INFO L225 Difference]: With dead ends: 31662 [2021-05-21 19:51:24,882 INFO L226 Difference]: Without dead ends: 31607 [2021-05-21 19:51:24,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:51:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31607 states. [2021-05-21 19:51:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31607 to 30777. [2021-05-21 19:51:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30777 states, 30689 states have (on average 5.347942259441494) internal successors, (164123), 30776 states have internal predecessors, (164123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30777 states to 30777 states and 164123 transitions. [2021-05-21 19:51:26,670 INFO L78 Accepts]: Start accepts. Automaton has 30777 states and 164123 transitions. Word has length 4 [2021-05-21 19:51:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:26,670 INFO L482 AbstractCegarLoop]: Abstraction has 30777 states and 164123 transitions. [2021-05-21 19:51:26,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30777 states and 164123 transitions. [2021-05-21 19:51:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-21 19:51:26,671 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:26,672 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:26,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 19:51:26,672 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1467091051, now seen corresponding path program 1 times [2021-05-21 19:51:26,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:26,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491942758] [2021-05-21 19:51:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:26,675 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:51:26,681 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:51:26,684 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:51:26,684 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:51:26,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 19:51:26,684 WARN L242 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:51:26,684 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-05-21 19:51:26,713 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:51:26,713 INFO L255 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-05-21 19:51:26,714 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:51:26,714 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:51:26,714 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:51:26,714 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:51:26,714 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:51:26,714 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:51:26,714 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:51:26,714 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:51:26,715 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 138 flow [2021-05-21 19:51:46,945 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54688 states, 54497 states have (on average 6.558581206304934) internal successors, (357423), 54687 states have internal predecessors, (357423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 54688 states, 54497 states have (on average 6.558581206304934) internal successors, (357423), 54687 states have internal predecessors, (357423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-21 19:51:47,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:47,029 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-21 19:51:47,029 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash 5579658, now seen corresponding path program 1 times [2021-05-21 19:51:47,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:47,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137499545] [2021-05-21 19:51:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:47,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:47,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137499545] [2021-05-21 19:51:47,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137499545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:51:47,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:51:47,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 19:51:47,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936148716] [2021-05-21 19:51:47,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 19:51:47,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 19:51:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:51:47,131 INFO L87 Difference]: Start difference. First operand has 54688 states, 54497 states have (on average 6.558581206304934) internal successors, (357423), 54687 states have internal predecessors, (357423), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:48,964 INFO L93 Difference]: Finished difference Result 160806 states and 992685 transitions. [2021-05-21 19:51:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 19:51:48,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-05-21 19:51:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:50,457 INFO L225 Difference]: With dead ends: 160806 [2021-05-21 19:51:50,457 INFO L226 Difference]: Without dead ends: 160731 [2021-05-21 19:51:50,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:51:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160731 states. [2021-05-21 19:51:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160731 to 158203. [2021-05-21 19:51:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158203 states, 158020 states have (on average 6.239305151246677) internal successors, (985935), 158202 states have internal predecessors, (985935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:52:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158203 states to 158203 states and 985935 transitions. [2021-05-21 19:52:00,943 INFO L78 Accepts]: Start accepts. Automaton has 158203 states and 985935 transitions. Word has length 4 [2021-05-21 19:52:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:52:00,944 INFO L482 AbstractCegarLoop]: Abstraction has 158203 states and 985935 transitions. [2021-05-21 19:52:00,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:52:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 158203 states and 985935 transitions. [2021-05-21 19:52:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:52:00,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:52:00,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:52:00,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 19:52:00,945 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:52:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:52:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1022663346, now seen corresponding path program 1 times [2021-05-21 19:52:00,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:52:00,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229042464] [2021-05-21 19:52:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:52:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:52:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:52:00,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:52:00,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229042464] [2021-05-21 19:52:00,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229042464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:52:00,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:52:00,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 19:52:00,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164289034] [2021-05-21 19:52:00,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 19:52:00,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:52:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 19:52:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 19:52:00,988 INFO L87 Difference]: Start difference. First operand 158203 states and 985935 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) [2021-05-21 19:52:06,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:52:06,054 INFO L93 Difference]: Finished difference Result 375293 states and 2224451 transitions. [2021-05-21 19:52:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 19:52:06,069 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 8 [2021-05-21 19:52:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:52:08,815 INFO L225 Difference]: With dead ends: 375293 [2021-05-21 19:52:08,815 INFO L226 Difference]: Without dead ends: 374443 [2021-05-21 19:52:08,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 19:52:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374443 states. [2021-05-21 19:52:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374443 to 196711. [2021-05-21 19:52:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196711 states, 196531 states have (on average 6.0801196757763405) internal successors, (1194932), 196710 states have internal predecessors, (1194932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:52:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196711 states to 196711 states and 1194932 transitions. [2021-05-21 19:52:25,161 INFO L78 Accepts]: Start accepts. Automaton has 196711 states and 1194932 transitions. Word has length 8 [2021-05-21 19:52:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:52:25,162 INFO L482 AbstractCegarLoop]: Abstraction has 196711 states and 1194932 transitions. [2021-05-21 19:52:25,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has 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) [2021-05-21 19:52:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 196711 states and 1194932 transitions. [2021-05-21 19:52:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:52:25,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:52:25,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:52:25,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-21 19:52:25,164 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:52:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:52:25,164 INFO L82 PathProgramCache]: Analyzing trace with hash -817562652, now seen corresponding path program 1 times [2021-05-21 19:52:25,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:52:25,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291073272] [2021-05-21 19:52:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:52:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:52:25,167 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:52:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:52:25,168 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:52:25,169 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:52:25,169 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:52:25,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-21 19:52:25,169 WARN L242 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:52:25,169 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-05-21 19:52:25,179 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:52:25,179 INFO L255 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-05-21 19:52:25,180 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:52:25,180 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:52:25,180 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:52:25,180 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:52:25,180 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:52:25,180 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:52:25,180 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:52:25,180 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:52:25,181 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 45 transitions, 167 flow [2021-05-21 20:01:55,209 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 273438 states, 273055 states have (on average 7.546274560070316) internal successors, (2060548), 273437 states have internal predecessors, (2060548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 273438 states, 273055 states have (on average 7.546274560070316) internal successors, (2060548), 273437 states have internal predecessors, (2060548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-21 20:01:55,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:55,635 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-21 20:01:55,635 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:55,635 INFO L82 PathProgramCache]: Analyzing trace with hash 6969103, now seen corresponding path program 1 times [2021-05-21 20:01:55,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:55,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766123151] [2021-05-21 20:01:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:55,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:01:55,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766123151] [2021-05-21 20:01:55,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766123151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:01:55,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:01:55,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:01:55,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958902786] [2021-05-21 20:01:55,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:01:55,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:01:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:01:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:56,105 INFO L87 Difference]: Start difference. First operand has 273438 states, 273055 states have (on average 7.546274560070316) internal successors, (2060548), 273437 states have internal predecessors, (2060548), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:02:14,370 INFO L93 Difference]: Finished difference Result 810902 states and 5756895 transitions. [2021-05-21 20:02:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:02:14,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-05-21 20:02:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:02:24,538 INFO L225 Difference]: With dead ends: 810902 [2021-05-21 20:02:24,538 INFO L226 Difference]: Without dead ends: 810804 [2021-05-21 20:02:24,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:03:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810804 states. [2021-05-21 20:04:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810804 to 803176. [2021-05-21 20:04:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803176 states, 802802 states have (on average 7.143298098410318) internal successors, (5734654), 803175 states have internal predecessors, (5734654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)