/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-29289db [2021-06-05 03:09:43,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:09:43,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:09:43,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:09:43,800 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 03:09:43,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:09:43,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:09:43,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:09:43,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:09:43,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:09:43,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:09:43,816 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:09:43,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:09:43,817 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:09:43,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:09:43,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:09:43,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:09:43,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:09:43,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:09:43,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:09:43,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:09:43,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:09:43,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:09:43,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:09:43,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:09:43,819 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:09:43,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:09:43,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:09:44,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:09:44,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:09:44,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:09:44,062 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:09:44,063 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:09:44,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl [2021-06-05 03:09:44,064 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl' [2021-06-05 03:09:44,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:09:44,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:09:44,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:09:44,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:09:44,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:09:44,113 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 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,117 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 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:09:44,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:09:44,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:09:44,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:09:44,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (1/1) ... [2021-06-05 03:09:44,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:09:44,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:09:44,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:09:44,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:09:44,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (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 03:09:44,192 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:09:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:09:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:09:44,193 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-05 03:09:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-05 03:09:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-05 03:09:44,194 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 03:09:44,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:09:44,271 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 03:09:44,272 INFO L202 PluginConnector]: Adding new model fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:09:44 BoogieIcfgContainer [2021-06-05 03:09:44,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:09:44,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:09:44,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:09:44,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:09:44,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:44" (1/2) ... [2021-06-05 03:09:44,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4310fba8 and model type fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:09:44, skipping insertion in model container [2021-06-05 03:09:44,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:09:44" (2/2) ... [2021-06-05 03:09:44,277 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_mutex.bpl [2021-06-05 03:09:44,280 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:09:44,280 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:09:44,281 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:09:44,281 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:09:44,305 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:44,319 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:09:44,345 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:44,345 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:44,346 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:44,346 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:44,346 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:44,346 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:44,346 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:44,346 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:44,351 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 9 transitions, 23 flow [2021-06-05 03:09:44,356 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) [2021-06-05 03:09:44,358 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) [2021-06-05 03:09:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-06-05 03:09:44,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:44,361 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-06-05 03:09:44,362 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:09:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash 45133, now seen corresponding path program 1 times [2021-06-05 03:09:44,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:44,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724607294] [2021-06-05 03:09:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:44,418 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:44,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:44,435 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:44,436 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:44,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:09:44,437 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:44,437 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-05 03:09:44,450 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:44,451 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 03:09:44,455 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:44,455 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:44,455 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:44,455 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:44,455 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:44,455 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:44,456 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:44,456 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:44,457 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 42 flow [2021-06-05 03:09:44,466 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) [2021-06-05 03:09:44,467 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) [2021-06-05 03:09:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 03:09:44,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:44,467 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 03:09:44,467 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:44,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1865938, now seen corresponding path program 1 times [2021-06-05 03:09:44,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:44,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827712014] [2021-06-05 03:09:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:44,475 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:44,479 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:44,482 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:44,482 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:44,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:09:44,482 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:44,482 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-05 03:09:44,496 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:44,496 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 03:09:44,498 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:44,498 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:44,498 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:44,498 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:44,498 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:44,498 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:44,498 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:44,498 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:44,501 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 63 flow [2021-06-05 03:09:44,529 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) [2021-06-05 03:09:44,530 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) [2021-06-05 03:09:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 03:09:44,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:44,531 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 03:09:44,531 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:44,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2517147, now seen corresponding path program 1 times [2021-06-05 03:09:44,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:44,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178658664] [2021-06-05 03:09:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:44,613 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 03:09:44,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178658664] [2021-06-05 03:09:44,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178658664] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:44,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:44,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:09:44,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361321283] [2021-06-05 03:09:44,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:44,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:44,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:44,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:44,626 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) [2021-06-05 03:09:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:44,720 INFO L93 Difference]: Finished difference Result 1150 states and 3931 transitions. [2021-06-05 03:09:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:09:44,722 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 [2021-06-05 03:09:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:44,741 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 03:09:44,741 INFO L226 Difference]: Without dead ends: 1126 [2021-06-05 03:09:44,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-06-05 03:09:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1046. [2021-06-05 03:09:44,822 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) [2021-06-05 03:09:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3724 transitions. [2021-06-05 03:09:44,829 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3724 transitions. Word has length 4 [2021-06-05 03:09:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:44,829 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 3724 transitions. [2021-06-05 03:09:44,829 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) [2021-06-05 03:09:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3724 transitions. [2021-06-05 03:09:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:09:44,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:44,830 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:09:44,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:09:44,830 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash 78038544, now seen corresponding path program 1 times [2021-06-05 03:09:44,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:44,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208836169] [2021-06-05 03:09:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:44,833 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:44,835 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:44,836 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:44,836 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:44,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:09:44,837 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:44,837 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-05 03:09:44,844 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:44,844 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 03:09:44,845 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:44,845 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:44,845 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:44,845 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:44,845 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:44,845 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:44,845 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:44,845 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:44,846 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 86 flow [2021-06-05 03:09:44,960 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) [2021-06-05 03:09:44,965 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) [2021-06-05 03:09:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 03:09:44,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:44,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 03:09:44,965 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash 3352960, now seen corresponding path program 1 times [2021-06-05 03:09:44,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:44,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407797397] [2021-06-05 03:09:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:44,979 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 03:09:44,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:44,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407797397] [2021-06-05 03:09:44,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407797397] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:44,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:44,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:09:44,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071880758] [2021-06-05 03:09:44,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:44,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:44,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:44,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:44,987 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) [2021-06-05 03:09:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:45,100 INFO L93 Difference]: Finished difference Result 6142 states and 26589 transitions. [2021-06-05 03:09:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:09:45,101 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 [2021-06-05 03:09:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:45,139 INFO L225 Difference]: With dead ends: 6142 [2021-06-05 03:09:45,139 INFO L226 Difference]: Without dead ends: 6104 [2021-06-05 03:09:45,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2021-06-05 03:09:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 5838. [2021-06-05 03:09:45,414 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) [2021-06-05 03:09:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 25936 transitions. [2021-06-05 03:09:45,446 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 25936 transitions. Word has length 4 [2021-06-05 03:09:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:45,446 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 25936 transitions. [2021-06-05 03:09:45,447 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) [2021-06-05 03:09:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 25936 transitions. [2021-06-05 03:09:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 03:09:45,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:45,449 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 03:09:45,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:09:45,449 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1072247397, now seen corresponding path program 1 times [2021-06-05 03:09:45,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:45,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077349552] [2021-06-05 03:09:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:45,459 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:45,461 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:45,461 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:45,462 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:45,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 03:09:45,462 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:45,462 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-05 03:09:45,473 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:45,473 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 03:09:45,474 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:45,474 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:45,475 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:45,475 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:45,475 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:45,475 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:45,475 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:45,475 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:45,476 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 33 transitions, 111 flow [2021-06-05 03:09:46,188 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) [2021-06-05 03:09:46,212 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) [2021-06-05 03:09:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 03:09:46,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:46,213 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 03:09:46,213 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 4373477, now seen corresponding path program 1 times [2021-06-05 03:09:46,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:46,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647711382] [2021-06-05 03:09:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:46,226 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 03:09:46,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:46,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647711382] [2021-06-05 03:09:46,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647711382] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:46,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:46,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:09:46,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826714657] [2021-06-05 03:09:46,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:46,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:46,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:46,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:46,247 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) [2021-06-05 03:09:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:46,862 INFO L93 Difference]: Finished difference Result 31662 states and 166199 transitions. [2021-06-05 03:09:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:09:46,863 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 [2021-06-05 03:09:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:47,153 INFO L225 Difference]: With dead ends: 31662 [2021-06-05 03:09:47,153 INFO L226 Difference]: Without dead ends: 31607 [2021-06-05 03:09:47,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31607 states. [2021-06-05 03:09:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31607 to 30777. [2021-06-05 03:09:48,459 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) [2021-06-05 03:09:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30777 states to 30777 states and 164123 transitions. [2021-06-05 03:09:48,777 INFO L78 Accepts]: Start accepts. Automaton has 30777 states and 164123 transitions. Word has length 4 [2021-06-05 03:09:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:48,777 INFO L482 AbstractCegarLoop]: Abstraction has 30777 states and 164123 transitions. [2021-06-05 03:09:48,777 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) [2021-06-05 03:09:48,777 INFO L276 IsEmpty]: Start isEmpty. Operand 30777 states and 164123 transitions. [2021-06-05 03:09:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:09:48,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:48,778 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:48,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 03:09:48,779 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:48,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1467091051, now seen corresponding path program 1 times [2021-06-05 03:09:48,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:48,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006345385] [2021-06-05 03:09:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:48,782 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:09:48,783 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:09:48,785 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:09:48,785 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:09:48,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:09:48,785 WARN L242 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:09:48,785 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-05 03:09:48,797 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:09:48,797 INFO L255 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-06-05 03:09:48,798 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:48,798 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:48,798 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:48,798 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:48,798 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:48,798 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:48,798 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:48,798 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:48,799 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 138 flow [2021-06-05 03:10:02,609 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) [2021-06-05 03:10:02,698 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) [2021-06-05 03:10:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 03:10:02,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:10:02,699 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 03:10:02,699 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 03:10:02,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:10:02,699 INFO L82 PathProgramCache]: Analyzing trace with hash 5579658, now seen corresponding path program 1 times [2021-06-05 03:10:02,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:10:02,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309852930] [2021-06-05 03:10:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:10:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:10:02,720 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 03:10:02,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:10:02,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309852930] [2021-06-05 03:10:02,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309852930] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:10:02,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:10:02,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:10:02,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065613155] [2021-06-05 03:10:02,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:10:02,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:10:02,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:10:02,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:10:02,799 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) [2021-06-05 03:10:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:10:04,890 INFO L93 Difference]: Finished difference Result 160806 states and 992685 transitions. [2021-06-05 03:10:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:10:04,890 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 [2021-06-05 03:10:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:10:05,961 INFO L225 Difference]: With dead ends: 160806 [2021-06-05 03:10:05,961 INFO L226 Difference]: Without dead ends: 160731 [2021-06-05 03:10:05,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:10:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160731 states. [2021-06-05 03:10:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160731 to 158203. [2021-06-05 03:10:14,355 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) [2021-06-05 03:10:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158203 states to 158203 states and 985935 transitions. [2021-06-05 03:10:15,810 INFO L78 Accepts]: Start accepts. Automaton has 158203 states and 985935 transitions. Word has length 4 [2021-06-05 03:10:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:10:15,810 INFO L482 AbstractCegarLoop]: Abstraction has 158203 states and 985935 transitions. [2021-06-05 03:10:15,810 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) [2021-06-05 03:10:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 158203 states and 985935 transitions. [2021-06-05 03:10:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:10:15,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:10:15,812 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:10:15,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 03:10:15,812 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 03:10:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:10:15,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1022663346, now seen corresponding path program 1 times [2021-06-05 03:10:15,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:10:15,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168467319] [2021-06-05 03:10:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:10:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:10:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:10:15,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:10:15,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168467319] [2021-06-05 03:10:15,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168467319] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:10:15,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:10:15,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:10:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745651112] [2021-06-05 03:10:15,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:10:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:10:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:10:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:10:15,848 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) [2021-06-05 03:10:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:10:20,204 INFO L93 Difference]: Finished difference Result 375293 states and 2224451 transitions. [2021-06-05 03:10:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:10:20,205 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 [2021-06-05 03:10:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:10:23,261 INFO L225 Difference]: With dead ends: 375293 [2021-06-05 03:10:23,262 INFO L226 Difference]: Without dead ends: 374443 [2021-06-05 03:10:23,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:10:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374443 states. [2021-06-05 03:10:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374443 to 196711. [2021-06-05 03:10:36,893 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) [2021-06-05 03:10:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196711 states to 196711 states and 1194932 transitions. [2021-06-05 03:10:38,670 INFO L78 Accepts]: Start accepts. Automaton has 196711 states and 1194932 transitions. Word has length 8 [2021-06-05 03:10:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:10:38,671 INFO L482 AbstractCegarLoop]: Abstraction has 196711 states and 1194932 transitions. [2021-06-05 03:10:38,671 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) [2021-06-05 03:10:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 196711 states and 1194932 transitions. [2021-06-05 03:10:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:10:38,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:10:38,672 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:10:38,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 03:10:38,672 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 03:10:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:10:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash -817562652, now seen corresponding path program 1 times [2021-06-05 03:10:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:10:38,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637699422] [2021-06-05 03:10:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:10:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:10:38,676 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:10:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:10:38,677 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:10:38,678 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:10:38,678 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:10:38,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 03:10:38,678 WARN L242 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:10:38,678 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-05 03:10:38,696 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:10:38,699 INFO L255 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-06-05 03:10:38,699 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:10:38,700 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:10:38,700 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:10:38,700 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:10:38,700 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:10:38,700 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:10:38,700 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:10:38,700 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:10:38,703 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 45 transitions, 167 flow [2021-06-05 03:18:32,019 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) [2021-06-05 03:18:32,456 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) [2021-06-05 03:18:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 03:18:32,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:18:32,457 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 03:18:32,457 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:18:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:18:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash 6969103, now seen corresponding path program 1 times [2021-06-05 03:18:32,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:18:32,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798444246] [2021-06-05 03:18:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:18:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:18:32,468 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 03:18:32,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:18:32,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798444246] [2021-06-05 03:18:32,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798444246] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:18:32,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:18:32,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:18:32,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689090278] [2021-06-05 03:18:32,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:18:32,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:18:32,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:18:32,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:18:32,857 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) [2021-06-05 03:18:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:18:46,951 INFO L93 Difference]: Finished difference Result 810902 states and 5756895 transitions. [2021-06-05 03:18:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:18:46,952 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 [2021-06-05 03:18:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:18:53,685 INFO L225 Difference]: With dead ends: 810902 [2021-06-05 03:18:53,685 INFO L226 Difference]: Without dead ends: 810804 [2021-06-05 03:18:53,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810804 states.