/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 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:34:13,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:34:13,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:34:13,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 20:34:13,509 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 [2021-03-10 20:34:13,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:34:13,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:34:13,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:34:13,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:34:13,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:34:13,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:34:13,542 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:34:13,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:34:13,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:34:13,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:34:13,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:34:13,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:34:13,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:34:13,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:34:13,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:34:13,543 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:34:13,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:34:13,544 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:34:13,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:34:13,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:34:13,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:34:13,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:34:13,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:34:13,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:34:13,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:34:13,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:34:13,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:34:13,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:34:13,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:34:13,545 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:34:13,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:34:13,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:34:13,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:34:13,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:34:13,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:34:13,848 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:34:13,849 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:34:13,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl [2021-03-10 20:34:13,850 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl' [2021-03-10 20:34:13,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:34:13,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:34:13,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:34:13,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:34:13,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:34:13,901 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 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,910 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 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:34:13,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:34:13,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:34:13,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:34:13,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/1) ... [2021-03-10 20:34:13,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:34:13,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:34:13,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:34:13,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:34:13,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:34:13,995 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 20:34:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:34:13,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:34:13,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-10 20:34:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-10 20:34:13,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-10 20:34:13,996 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:34:14,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:34:14,105 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 20:34:14,106 INFO L202 PluginConnector]: Adding new model fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:34:14 BoogieIcfgContainer [2021-03-10 20:34:14,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:34:14,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:34:14,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:34:14,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:34:14,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:34:13" (1/2) ... [2021-03-10 20:34:14,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcbe98e and model type fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:34:14, skipping insertion in model container [2021-03-10 20:34:14,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:34:14" (2/2) ... [2021-03-10 20:34:14,111 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_mutex.bpl [2021-03-10 20:34:14,115 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:34:14,116 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:34:14,119 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:34:14,120 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:34:14,150 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:34:14,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 20:34:14,191 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:34:14,192 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:34:14,192 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:34:14,192 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:34:14,192 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:34:14,193 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:34:14,193 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:34:14,193 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:34:14,201 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 9 transitions, 23 flow [2021-03-10 20:34:14,210 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) [2021-03-10 20:34:14,212 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) [2021-03-10 20:34:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-03-10 20:34:14,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:14,216 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-03-10 20:34:14,217 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:34:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 45133, now seen corresponding path program 1 times [2021-03-10 20:34:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:14,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196887608] [2021-03-10 20:34:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:14,288 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:14,295 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:14,306 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:34:14,308 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:34:14,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:34:14,309 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:34:14,309 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-10 20:34:14,323 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:34:14,323 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 20:34:14,325 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:34:14,326 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:34:14,326 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:34:14,326 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:34:14,326 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:34:14,326 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:34:14,326 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:34:14,326 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:34:14,328 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 42 flow [2021-03-10 20:34:14,337 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) [2021-03-10 20:34:14,338 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) [2021-03-10 20:34:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-10 20:34:14,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:14,338 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-10 20:34:14,339 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:14,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1865938, now seen corresponding path program 1 times [2021-03-10 20:34:14,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:14,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796702065] [2021-03-10 20:34:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:14,353 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:14,358 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:14,361 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:34:14,361 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:34:14,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:34:14,361 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:34:14,363 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-10 20:34:14,377 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:34:14,378 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 20:34:14,380 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:34:14,380 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:34:14,380 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:34:14,380 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:34:14,380 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:34:14,380 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:34:14,380 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:34:14,380 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:34:14,383 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 63 flow [2021-03-10 20:34:14,416 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) [2021-03-10 20:34:14,417 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) [2021-03-10 20:34:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-10 20:34:14,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:14,418 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-10 20:34:14,419 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:14,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:14,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2517147, now seen corresponding path program 1 times [2021-03-10 20:34:14,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:14,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968565161] [2021-03-10 20:34:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:34:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:34:14,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968565161] [2021-03-10 20:34:14,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:34:14,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:34:14,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376460184] [2021-03-10 20:34:14,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:34:14,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:34:14,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:34:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:34:14,549 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) [2021-03-10 20:34:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:34:14,678 INFO L93 Difference]: Finished difference Result 1150 states and 3931 transitions. [2021-03-10 20:34:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:34:14,680 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 [2021-03-10 20:34:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:34:14,705 INFO L225 Difference]: With dead ends: 1150 [2021-03-10 20:34:14,705 INFO L226 Difference]: Without dead ends: 1126 [2021-03-10 20:34:14,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:34:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-03-10 20:34:14,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1046. [2021-03-10 20:34:14,815 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) [2021-03-10 20:34:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3724 transitions. [2021-03-10 20:34:14,826 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3724 transitions. Word has length 4 [2021-03-10 20:34:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:34:14,827 INFO L480 AbstractCegarLoop]: Abstraction has 1046 states and 3724 transitions. [2021-03-10 20:34:14,827 INFO L481 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) [2021-03-10 20:34:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3724 transitions. [2021-03-10 20:34:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:34:14,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:14,828 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:34:14,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 20:34:14,829 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 78038544, now seen corresponding path program 1 times [2021-03-10 20:34:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:14,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042708938] [2021-03-10 20:34:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:14,837 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:14,841 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:14,843 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:34:14,845 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:34:14,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 20:34:14,847 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:34:14,847 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-10 20:34:14,860 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:34:14,860 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-10 20:34:14,861 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:34:14,861 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:34:14,861 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:34:14,861 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:34:14,861 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:34:14,861 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:34:14,861 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:34:14,861 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:34:14,862 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 86 flow [2021-03-10 20:34:14,946 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) [2021-03-10 20:34:14,954 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) [2021-03-10 20:34:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-10 20:34:14,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:14,955 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-10 20:34:14,955 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:14,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:14,955 INFO L82 PathProgramCache]: Analyzing trace with hash 3352960, now seen corresponding path program 1 times [2021-03-10 20:34:14,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:14,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670838811] [2021-03-10 20:34:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:34:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:34:14,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670838811] [2021-03-10 20:34:14,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:34:14,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:34:14,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679973168] [2021-03-10 20:34:14,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:34:14,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:34:14,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:34:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:34:14,998 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) [2021-03-10 20:34:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:34:15,208 INFO L93 Difference]: Finished difference Result 6142 states and 26589 transitions. [2021-03-10 20:34:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:34:15,223 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 [2021-03-10 20:34:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:34:15,277 INFO L225 Difference]: With dead ends: 6142 [2021-03-10 20:34:15,278 INFO L226 Difference]: Without dead ends: 6104 [2021-03-10 20:34:15,278 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:34:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2021-03-10 20:34:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 5838. [2021-03-10 20:34:15,577 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) [2021-03-10 20:34:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 25936 transitions. [2021-03-10 20:34:15,612 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 25936 transitions. Word has length 4 [2021-03-10 20:34:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:34:15,612 INFO L480 AbstractCegarLoop]: Abstraction has 5838 states and 25936 transitions. [2021-03-10 20:34:15,612 INFO L481 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) [2021-03-10 20:34:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 25936 transitions. [2021-03-10 20:34:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-10 20:34:15,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:15,614 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-10 20:34:15,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 20:34:15,614 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1072247397, now seen corresponding path program 1 times [2021-03-10 20:34:15,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:15,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98617101] [2021-03-10 20:34:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:15,624 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:15,627 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:15,629 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:34:15,629 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:34:15,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 20:34:15,630 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:34:15,630 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-10 20:34:15,642 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:34:15,642 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-10 20:34:15,643 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:34:15,643 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:34:15,643 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:34:15,643 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:34:15,643 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:34:15,643 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:34:15,643 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:34:15,643 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:34:15,645 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 33 transitions, 111 flow [2021-03-10 20:34:16,485 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) [2021-03-10 20:34:16,506 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) [2021-03-10 20:34:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-10 20:34:16,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:16,507 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-10 20:34:16,507 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:16,507 INFO L82 PathProgramCache]: Analyzing trace with hash 4373477, now seen corresponding path program 1 times [2021-03-10 20:34:16,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:16,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966185449] [2021-03-10 20:34:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:34:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:34:16,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966185449] [2021-03-10 20:34:16,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:34:16,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:34:16,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135957852] [2021-03-10 20:34:16,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:34:16,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:34:16,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:34:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:34:16,550 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) [2021-03-10 20:34:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:34:17,101 INFO L93 Difference]: Finished difference Result 31662 states and 166199 transitions. [2021-03-10 20:34:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:34:17,103 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 [2021-03-10 20:34:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:34:17,457 INFO L225 Difference]: With dead ends: 31662 [2021-03-10 20:34:17,458 INFO L226 Difference]: Without dead ends: 31607 [2021-03-10 20:34:17,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:34:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31607 states. [2021-03-10 20:34:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31607 to 30777. [2021-03-10 20:34:18,586 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) [2021-03-10 20:34:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30777 states to 30777 states and 164123 transitions. [2021-03-10 20:34:18,928 INFO L78 Accepts]: Start accepts. Automaton has 30777 states and 164123 transitions. Word has length 4 [2021-03-10 20:34:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:34:18,928 INFO L480 AbstractCegarLoop]: Abstraction has 30777 states and 164123 transitions. [2021-03-10 20:34:18,929 INFO L481 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) [2021-03-10 20:34:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 30777 states and 164123 transitions. [2021-03-10 20:34:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:34:18,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:18,930 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:34:18,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 20:34:18,930 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1467091051, now seen corresponding path program 1 times [2021-03-10 20:34:18,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:18,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293185327] [2021-03-10 20:34:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:18,934 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:34:18,935 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:34:18,936 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:34:18,936 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:34:18,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 20:34:18,937 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:34:18,937 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-03-10 20:34:18,945 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:34:18,945 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-03-10 20:34:18,945 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:34:18,945 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:34:18,945 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:34:18,945 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:34:18,945 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:34:18,946 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:34:18,946 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:34:18,946 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:34:18,946 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 138 flow [2021-03-10 20:34:39,640 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) [2021-03-10 20:34:39,761 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) [2021-03-10 20:34:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-10 20:34:39,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:39,761 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-10 20:34:39,761 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash 5579658, now seen corresponding path program 1 times [2021-03-10 20:34:39,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:39,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587772169] [2021-03-10 20:34:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:34:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:34:39,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587772169] [2021-03-10 20:34:39,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:34:39,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:34:39,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508023560] [2021-03-10 20:34:39,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:34:39,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:34:39,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:34:39,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:34:39,915 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) [2021-03-10 20:34:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:34:41,595 INFO L93 Difference]: Finished difference Result 160806 states and 992685 transitions. [2021-03-10 20:34:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:34:41,595 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 [2021-03-10 20:34:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:34:42,596 INFO L225 Difference]: With dead ends: 160806 [2021-03-10 20:34:42,596 INFO L226 Difference]: Without dead ends: 160731 [2021-03-10 20:34:42,597 INFO L775 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 [2021-03-10 20:34:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160731 states. [2021-03-10 20:34:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160731 to 158203. [2021-03-10 20:34:52,134 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) [2021-03-10 20:34:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158203 states to 158203 states and 985935 transitions. [2021-03-10 20:34:53,741 INFO L78 Accepts]: Start accepts. Automaton has 158203 states and 985935 transitions. Word has length 4 [2021-03-10 20:34:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:34:53,741 INFO L480 AbstractCegarLoop]: Abstraction has 158203 states and 985935 transitions. [2021-03-10 20:34:53,741 INFO L481 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) [2021-03-10 20:34:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 158203 states and 985935 transitions. [2021-03-10 20:34:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:34:53,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:53,742 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:34:53,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 20:34:53,743 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1022663346, now seen corresponding path program 1 times [2021-03-10 20:34:53,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:53,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703426990] [2021-03-10 20:34:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:34:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:34:53,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703426990] [2021-03-10 20:34:53,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:34:53,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:34:53,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535062787] [2021-03-10 20:34:53,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 20:34:53,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:34:53,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 20:34:53,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:34:53,784 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) [2021-03-10 20:34:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:34:58,539 INFO L93 Difference]: Finished difference Result 375293 states and 2224451 transitions. [2021-03-10 20:34:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:34:58,539 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 [2021-03-10 20:34:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:01,166 INFO L225 Difference]: With dead ends: 375293 [2021-03-10 20:35:01,166 INFO L226 Difference]: Without dead ends: 374443 [2021-03-10 20:35:01,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:35:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374443 states. [2021-03-10 20:35:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374443 to 196711. [2021-03-10 20:35:15,959 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) [2021-03-10 20:35:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196711 states to 196711 states and 1194932 transitions. [2021-03-10 20:35:17,800 INFO L78 Accepts]: Start accepts. Automaton has 196711 states and 1194932 transitions. Word has length 8 [2021-03-10 20:35:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:17,800 INFO L480 AbstractCegarLoop]: Abstraction has 196711 states and 1194932 transitions. [2021-03-10 20:35:17,801 INFO L481 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) [2021-03-10 20:35:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 196711 states and 1194932 transitions. [2021-03-10 20:35:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:17,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:17,802 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:17,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 20:35:17,802 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:17,803 INFO L82 PathProgramCache]: Analyzing trace with hash -817562652, now seen corresponding path program 1 times [2021-03-10 20:35:17,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:17,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387158420] [2021-03-10 20:35:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:17,806 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:17,807 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:17,808 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:35:17,808 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:35:17,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 20:35:17,808 WARN L342 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:35:17,809 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-03-10 20:35:17,819 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:35:17,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-03-10 20:35:17,820 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:35:17,820 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:35:17,820 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:35:17,820 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:35:17,820 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:35:17,820 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:35:17,820 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:35:17,820 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:35:17,821 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 45 transitions, 167 flow [2021-03-10 20:44:06,205 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) [2021-03-10 20:44:06,732 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) [2021-03-10 20:44:06,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-10 20:44:06,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:44:06,733 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-10 20:44:06,733 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:44:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:44:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash 6969103, now seen corresponding path program 1 times [2021-03-10 20:44:06,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:44:06,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99980109] [2021-03-10 20:44:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:44:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:44:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:44:06,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99980109] [2021-03-10 20:44:06,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:44:06,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:44:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383045361] [2021-03-10 20:44:06,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:44:06,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:44:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:44:06,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:44:07,150 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) [2021-03-10 20:44:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:44:19,750 INFO L93 Difference]: Finished difference Result 810902 states and 5756895 transitions. [2021-03-10 20:44:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:44:19,750 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 [2021-03-10 20:44:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:44:26,966 INFO L225 Difference]: With dead ends: 810902 [2021-03-10 20:44:26,983 INFO L226 Difference]: Without dead ends: 810804 [2021-03-10 20:44:26,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:45:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810804 states. [2021-03-10 20:45:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810804 to 803176. [2021-03-10 20:45:59,657 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)