/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/regression/ForkInLoop02-Incrementer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:01:23,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:01:23,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:01:23,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:01:23,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 20:01:23,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:01:23,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:01:23,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:01:23,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:01:23,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:01:23,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:01:23,434 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:01:23,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:01:23,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:01:23,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:01:23,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:01:23,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:01:23,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:01:23,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:01:23,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:01:23,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:01:23,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:01:23,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:01:23,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:01:23,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:01:23,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:01:23,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:01:23,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:01:23,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:01:23,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:01:23,667 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:01:23,669 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:01:23,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-05-21 20:01:23,669 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-05-21 20:01:23,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:01:23,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:01:23,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:01:23,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:01:23,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:01:23,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:01:23,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:01:23,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:01:23,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:01:23,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... [2021-05-21 20:01:23,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:01:23,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:01:23,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:01:23,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:01:23,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:01:23,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-05-21 20:01:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-05-21 20:01:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-05-21 20:01:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:01:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:01:23,788 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:01:23,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:01:23,889 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-21 20:01:23,890 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:01:23 BoogieIcfgContainer [2021-05-21 20:01:23,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:01:23,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:01:23,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:01:23,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:01:23,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:01:23" (1/2) ... [2021-05-21 20:01:23,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a704673 and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:01:23, skipping insertion in model container [2021-05-21 20:01:23,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:01:23" (2/2) ... [2021-05-21 20:01:23,895 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-05-21 20:01:23,901 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:01:23,902 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:01:23,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:01:23,903 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:01:23,929 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 20:01:23,949 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 20:01:23,969 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:01:23,969 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:01:23,970 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:01:23,970 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:01:23,970 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:01:23,971 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:01:23,971 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:01:23,971 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:01:23,977 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 25 flow [2021-05-21 20:01:23,985 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 20:01:23,991 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:23,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 20:01:23,991 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:23,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:23,995 INFO L82 PathProgramCache]: Analyzing trace with hash 42091544, now seen corresponding path program 1 times [2021-05-21 20:01:24,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:24,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430193593] [2021-05-21 20:01:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:24,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:01:24,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430193593] [2021-05-21 20:01:24,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430193593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:01:24,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:01:24,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:01:24,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154241149] [2021-05-21 20:01:24,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:01:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:01:24,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:01:24,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:24,145 INFO L87 Difference]: Start difference. First operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:01:24,168 INFO L93 Difference]: Finished difference Result 20 states and 28 transitions. [2021-05-21 20:01:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:01:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-05-21 20:01:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:01:24,177 INFO L225 Difference]: With dead ends: 20 [2021-05-21 20:01:24,178 INFO L226 Difference]: Without dead ends: 15 [2021-05-21 20:01:24,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-21 20:01:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-21 20:01:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2021-05-21 20:01:24,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 5 [2021-05-21 20:01:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:01:24,201 INFO L482 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2021-05-21 20:01:24,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2021-05-21 20:01:24,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 20:01:24,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:24,201 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 20:01:24,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:01:24,202 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:24,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:24,204 INFO L82 PathProgramCache]: Analyzing trace with hash 42091268, now seen corresponding path program 1 times [2021-05-21 20:01:24,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:24,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090778561] [2021-05-21 20:01:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:01:24,212 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:01:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:01:24,217 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:01:24,227 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 20:01:24,227 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 20:01:24,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:01:24,228 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 20:01:24,228 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-05-21 20:01:24,257 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 20:01:24,258 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:01:24,259 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:01:24,259 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:01:24,259 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:01:24,259 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:01:24,259 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:01:24,259 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:01:24,259 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:01:24,259 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:01:24,260 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-05-21 20:01:24,283 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 20:01:24,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:24,283 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 20:01:24,284 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:24,284 INFO L82 PathProgramCache]: Analyzing trace with hash 56409963, now seen corresponding path program 1 times [2021-05-21 20:01:24,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:24,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587012157] [2021-05-21 20:01:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:24,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:01:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587012157] [2021-05-21 20:01:24,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587012157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:01:24,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:01:24,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:01:24,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095719595] [2021-05-21 20:01:24,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:01:24,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:01:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:01:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:24,300 INFO L87 Difference]: Start difference. First operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:01:24,322 INFO L93 Difference]: Finished difference Result 108 states and 238 transitions. [2021-05-21 20:01:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:01:24,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-05-21 20:01:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:01:24,324 INFO L225 Difference]: With dead ends: 108 [2021-05-21 20:01:24,324 INFO L226 Difference]: Without dead ends: 99 [2021-05-21 20:01:24,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-21 20:01:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-21 20:01:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 2.369565217391304) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 218 transitions. [2021-05-21 20:01:24,338 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 218 transitions. Word has length 5 [2021-05-21 20:01:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:01:24,338 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 218 transitions. [2021-05-21 20:01:24,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 218 transitions. [2021-05-21 20:01:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-21 20:01:24,339 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:24,339 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-05-21 20:01:24,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:01:24,339 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1624858962, now seen corresponding path program 1 times [2021-05-21 20:01:24,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:24,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370680862] [2021-05-21 20:01:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:01:24,343 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:01:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:01:24,346 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:01:24,347 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 20:01:24,347 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 20:01:24,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:01:24,348 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 20:01:24,348 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-05-21 20:01:24,354 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 20:01:24,354 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-21 20:01:24,355 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:01:24,355 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:01:24,355 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:01:24,355 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:01:24,355 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:01:24,355 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:01:24,355 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:01:24,355 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:01:24,356 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 61 flow [2021-05-21 20:01:24,383 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 20:01:24,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:24,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 20:01:24,385 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:24,386 INFO L82 PathProgramCache]: Analyzing trace with hash 75500163, now seen corresponding path program 1 times [2021-05-21 20:01:24,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:24,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250254222] [2021-05-21 20:01:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:24,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:01:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250254222] [2021-05-21 20:01:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250254222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:01:24,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:01:24,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:01:24,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264004878] [2021-05-21 20:01:24,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:01:24,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:01:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:01:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:24,405 INFO L87 Difference]: Start difference. First operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:01:24,450 INFO L93 Difference]: Finished difference Result 573 states and 1732 transitions. [2021-05-21 20:01:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:01:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-05-21 20:01:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:01:24,460 INFO L225 Difference]: With dead ends: 573 [2021-05-21 20:01:24,460 INFO L226 Difference]: Without dead ends: 556 [2021-05-21 20:01:24,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-05-21 20:01:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-05-21 20:01:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 538 states have (on average 3.1226765799256504) internal successors, (1680), 555 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1680 transitions. [2021-05-21 20:01:24,525 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1680 transitions. Word has length 5 [2021-05-21 20:01:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:01:24,526 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1680 transitions. [2021-05-21 20:01:24,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1680 transitions. [2021-05-21 20:01:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 20:01:24,526 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:24,526 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:01:24,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:01:24,527 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1353166755, now seen corresponding path program 1 times [2021-05-21 20:01:24,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:24,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983553366] [2021-05-21 20:01:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:24,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:01:24,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983553366] [2021-05-21 20:01:24,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983553366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:01:24,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605474937] [2021-05-21 20:01:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:01:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:24,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:01:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:01:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:24,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605474937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:01:24,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:01:24,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-21 20:01:24,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212141950] [2021-05-21 20:01:24,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:01:24,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:01:24,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:01:24,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:01:24,717 INFO L87 Difference]: Start difference. First operand 556 states and 1680 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:01:24,750 INFO L93 Difference]: Finished difference Result 643 states and 1752 transitions. [2021-05-21 20:01:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:01:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 20:01:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:01:24,753 INFO L225 Difference]: With dead ends: 643 [2021-05-21 20:01:24,754 INFO L226 Difference]: Without dead ends: 613 [2021-05-21 20:01:24,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:01:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-05-21 20:01:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 541. [2021-05-21 20:01:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 526 states have (on average 2.946768060836502) internal successors, (1550), 540 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1550 transitions. [2021-05-21 20:01:24,771 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1550 transitions. Word has length 8 [2021-05-21 20:01:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:01:24,771 INFO L482 AbstractCegarLoop]: Abstraction has 541 states and 1550 transitions. [2021-05-21 20:01:24,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1550 transitions. [2021-05-21 20:01:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-21 20:01:24,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:24,772 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-05-21 20:01:24,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-21 20:01:24,984 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1006373414, now seen corresponding path program 1 times [2021-05-21 20:01:24,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:24,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103247353] [2021-05-21 20:01:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:01:24,990 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:01:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:01:24,993 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:01:24,994 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 20:01:24,994 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 20:01:24,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 20:01:24,994 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 20:01:24,994 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-05-21 20:01:25,007 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 20:01:25,008 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-05-21 20:01:25,009 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:01:25,009 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:01:25,009 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:01:25,009 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:01:25,010 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:01:25,010 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:01:25,010 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:01:25,010 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:01:25,011 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-05-21 20:01:25,107 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 20:01:25,114 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:25,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 20:01:25,114 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:25,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:25,115 INFO L82 PathProgramCache]: Analyzing trace with hash 99361376, now seen corresponding path program 1 times [2021-05-21 20:01:25,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:25,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547518294] [2021-05-21 20:01:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:25,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:01:25,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547518294] [2021-05-21 20:01:25,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547518294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:01:25,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:01:25,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:01:25,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258142949] [2021-05-21 20:01:25,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:01:25,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:01:25,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:01:25,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:25,157 INFO L87 Difference]: Start difference. First operand has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:01:25,265 INFO L93 Difference]: Finished difference Result 2935 states and 11240 transitions. [2021-05-21 20:01:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:01:25,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-05-21 20:01:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:01:25,285 INFO L225 Difference]: With dead ends: 2935 [2021-05-21 20:01:25,285 INFO L226 Difference]: Without dead ends: 2902 [2021-05-21 20:01:25,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:01:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-05-21 20:01:25,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2902. [2021-05-21 20:01:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2861 states have (on average 3.88255854596295) internal successors, (11108), 2901 states have internal predecessors, (11108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 11108 transitions. [2021-05-21 20:01:25,377 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 11108 transitions. Word has length 5 [2021-05-21 20:01:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:01:25,377 INFO L482 AbstractCegarLoop]: Abstraction has 2902 states and 11108 transitions. [2021-05-21 20:01:25,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 11108 transitions. [2021-05-21 20:01:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 20:01:25,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:25,378 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:01:25,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 20:01:25,379 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:25,379 INFO L82 PathProgramCache]: Analyzing trace with hash 842086411, now seen corresponding path program 1 times [2021-05-21 20:01:25,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:25,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279371402] [2021-05-21 20:01:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:25,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:01:25,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279371402] [2021-05-21 20:01:25,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279371402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:01:25,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568249045] [2021-05-21 20:01:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:01:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:01:25,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:01:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:01:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:01:25,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568249045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:01:25,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:01:25,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-21 20:01:25,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329959686] [2021-05-21 20:01:25,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:01:25,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:01:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:01:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:01:25,486 INFO L87 Difference]: Start difference. First operand 2902 states and 11108 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:01:25,567 INFO L93 Difference]: Finished difference Result 4458 states and 15343 transitions. [2021-05-21 20:01:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:01:25,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 20:01:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:01:25,588 INFO L225 Difference]: With dead ends: 4458 [2021-05-21 20:01:25,589 INFO L226 Difference]: Without dead ends: 4364 [2021-05-21 20:01:25,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:01:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2021-05-21 20:01:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 3766. [2021-05-21 20:01:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3766 states, 3728 states have (on average 3.6555793991416308) internal successors, (13628), 3765 states have internal predecessors, (13628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 13628 transitions. [2021-05-21 20:01:25,726 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 13628 transitions. Word has length 8 [2021-05-21 20:01:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:01:25,727 INFO L482 AbstractCegarLoop]: Abstraction has 3766 states and 13628 transitions. [2021-05-21 20:01:25,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:01:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 13628 transitions. [2021-05-21 20:01:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-21 20:01:25,730 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:01:25,731 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:01:25,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:01:25,947 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:01:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:01:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash -307903811, now seen corresponding path program 1 times [2021-05-21 20:01:25,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:01:25,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500003359] [2021-05-21 20:01:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:01:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:01:25,952 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:01:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:01:25,964 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:01:25,967 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 20:01:25,968 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 20:01:25,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-21 20:01:25,970 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 4 thread instances [2021-05-21 20:01:25,977 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 08:01:25 BasicIcfg [2021-05-21 20:01:25,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 20:01:25,977 INFO L168 Benchmark]: Toolchain (without parser) took 2277.05 ms. Allocated memory is still 343.9 MB. Free memory was 323.6 MB in the beginning and 148.3 MB in the end (delta: 175.3 MB). Peak memory consumption was 175.0 MB. Max. memory is 16.0 GB. [2021-05-21 20:01:25,978 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 343.9 MB. Free memory was 324.6 MB in the beginning and 324.5 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:01:25,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.73 ms. Allocated memory is still 343.9 MB. Free memory was 323.5 MB in the beginning and 322.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:01:25,981 INFO L168 Benchmark]: Boogie Preprocessor took 9.42 ms. Allocated memory is still 343.9 MB. Free memory was 322.0 MB in the beginning and 321.1 MB in the end (delta: 921.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:01:25,981 INFO L168 Benchmark]: RCFGBuilder took 159.86 ms. Allocated memory is still 343.9 MB. Free memory was 321.1 MB in the beginning and 312.6 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-05-21 20:01:25,982 INFO L168 Benchmark]: TraceAbstraction took 2085.27 ms. Allocated memory is still 343.9 MB. Free memory was 312.2 MB in the beginning and 148.3 MB in the end (delta: 163.9 MB). Peak memory consumption was 162.4 MB. Max. memory is 16.0 GB. [2021-05-21 20:01:25,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 343.9 MB. Free memory was 324.6 MB in the beginning and 324.5 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.73 ms. Allocated memory is still 343.9 MB. Free memory was 323.5 MB in the beginning and 322.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.42 ms. Allocated memory is still 343.9 MB. Free memory was 322.0 MB in the beginning and 321.1 MB in the end (delta: 921.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 159.86 ms. Allocated memory is still 343.9 MB. Free memory was 321.1 MB in the beginning and 312.6 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2085.27 ms. Allocated memory is still 343.9 MB. Free memory was 312.2 MB in the beginning and 148.3 MB in the end (delta: 163.9 MB). Peak memory consumption was 162.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 newid := 0; VAL [newid=0] [L18] 0 n := 0; VAL [n=0, newid=0] [L21] FORK 0 fork newid foo(); VAL [n=0, newid=0] [L30] 1 n := n + 1; VAL [n=1, newid=0] [L22] 0 newid := newid + 1; VAL [n=1, newid=1] [L21] FORK 0 fork newid foo(); VAL [n=1, newid=1] [L30] 2 n := n + 1; VAL [n=2, newid=1] [L22] 0 newid := newid + 1; VAL [n=2, newid=2] [L21] FORK 0 fork newid foo(); VAL [n=2, newid=2] [L30] 3 n := n + 1; VAL [n=3, newid=2] [L31] 1 assert n <= 2; VAL [n=3, newid=2] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 260.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.8ms, AutomataDifference: 48.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7 SDtfs, 9 SDslu, 6 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.9ms SsaConstructionTime, 17.9ms SatisfiabilityAnalysisTime, 59.1ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 89.0ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 1.0ms, AutomataDifference: 25.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 13 SDslu, 13 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 12.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8ms SsaConstructionTime, 3.5ms SatisfiabilityAnalysisTime, 10.5ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 639.4ms, OverallIterations: 3, TraceHistogramMax: 3, EmptinessCheckTime: 2.8ms, AutomataDifference: 95.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28 SDtfs, 60 SDslu, 39 SDs, 0 SdLazy, 48 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=594occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 81.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 72 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.5ms SsaConstructionTime, 22.3ms SatisfiabilityAnalysisTime, 139.2ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 17 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 959.4ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 10.0ms, AutomataDifference: 240.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 97.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 55 SDslu, 51 SDs, 0 SdLazy, 72 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 92.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3766occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 228.6ms AutomataMinimizationTime, 2 MinimizatonAttempts, 598 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.9ms SsaConstructionTime, 19.3ms SatisfiabilityAnalysisTime, 83.1ms InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 17 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...