/usr/bin/java -Xmx8000000000 -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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98196c323137eee61a7c1131837b356358d783d4-98196c3 [2021-06-16 16:33:39,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-16 16:33:39,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-16 16:33:39,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-16 16:33:39,369 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-Delay.epf [2021-06-16 16:33:39,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-16 16:33:39,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-16 16:33:39,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-16 16:33:39,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-16 16:33:39,423 INFO L138 SettingsManager]: * Use SBE=true [2021-06-16 16:33:39,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-16 16:33:39,423 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-16 16:33:39,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-16 16:33:39,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-16 16:33:39,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-16 16:33:39,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-16 16:33:39,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-16 16:33:39,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-16 16:33:39,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-16 16:33:39,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-16 16:33:39,425 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-16 16:33:39,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-16 16:33:39,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-16 16:33:39,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-16 16:33:39,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-16 16:33:39,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-16 16:33:39,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-16 16:33:39,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-16 16:33:39,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-16 16:33:39,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-16 16:33:39,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-16 16:33:39,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-16 16:33:39,426 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-16 16:33:39,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-16 16:33:39,427 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-16 16:33:39,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-16 16:33:39,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-16 16:33:39,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-16 16:33:39,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-16 16:33:39,768 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-16 16:33:39,769 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-16 16:33:39,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl [2021-06-16 16:33:39,771 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl' [2021-06-16 16:33:39,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-16 16:33:39,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-16 16:33:39,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-16 16:33:39,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-16 16:33:39,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-16 16:33:39,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-16 16:33:39,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-16 16:33:39,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-16 16:33:39,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-16 16:33:39,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... [2021-06-16 16:33:39,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-16 16:33:39,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-16 16:33:39,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-16 16:33:39,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-16 16:33:39,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-16 16:33:39,899 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-06-16 16:33:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-06-16 16:33:39,899 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-06-16 16:33:39,899 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-16 16:33:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-16 16:33:39,899 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-16 16:33:39,900 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-16 16:33:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-16 16:33:39,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-16 16:33:39,901 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-16 16:33:40,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-16 16:33:40,018 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-16 16:33:40,019 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.06 04:33:40 BoogieIcfgContainer [2021-06-16 16:33:40,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-16 16:33:40,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-16 16:33:40,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-16 16:33:40,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-16 16:33:40,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:39" (1/2) ... [2021-06-16 16:33:40,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52beae7e and model type PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.06 04:33:40, skipping insertion in model container [2021-06-16 16:33:40,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.06 04:33:40" (2/2) ... [2021-06-16 16:33:40,024 INFO L111 eAbstractionObserver]: Analyzing ICFG PetersonWithBug.bpl [2021-06-16 16:33:40,029 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-16 16:33:40,029 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-16 16:33:40,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-16 16:33:40,030 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-16 16:33:40,053 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:40,053 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:40,057 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:40,057 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:40,068 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-16 16:33:40,086 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:40,103 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:40,103 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:40,103 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:40,103 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:40,104 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:40,104 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:40,104 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:40,104 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process0======== [2021-06-16 16:33:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 211 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,271 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:40,271 INFO L301 ceAbstractionStarter]: Result for error location Process0 was SAFE (1/5) [2021-06-16 16:33:40,273 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:40,275 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:40,276 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:40,276 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:40,276 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:40,276 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:40,276 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:40,276 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:40,276 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process1======== [2021-06-16 16:33:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 211 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,371 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:40,372 INFO L301 ceAbstractionStarter]: Result for error location Process1 was SAFE (2/5) [2021-06-16 16:33:40,372 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-16 16:33:40,375 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:40,375 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:40,375 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:40,375 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:40,375 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:40,375 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:40,375 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:40,375 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-16 16:33:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 211 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,484 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:40,485 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (3/5) [2021-06-16 16:33:40,485 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:40,486 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:40,487 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:40,487 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:40,487 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:40,487 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:40,487 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:40,487 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:40,487 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process1Thread1of1ForFork1======== [2021-06-16 16:33:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 211 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-16 16:33:40,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:40,566 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:40,567 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:40,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:40,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1568887245, now seen corresponding path program 1 times [2021-06-16 16:33:40,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:40,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017370962] [2021-06-16 16:33:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:40,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:40,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:40,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:40,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017370962] [2021-06-16 16:33:40,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017370962] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:40,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:40,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-16 16:33:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218845138] [2021-06-16 16:33:40,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:40,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:40,724 INFO L87 Difference]: Start difference. First operand has 212 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 211 states have internal predecessors, (368), 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 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:40,784 INFO L93 Difference]: Finished difference Result 159 states and 281 transitions. [2021-06-16 16:33:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-16 16:33:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:40,811 INFO L225 Difference]: With dead ends: 159 [2021-06-16 16:33:40,811 INFO L226 Difference]: Without dead ends: 145 [2021-06-16 16:33:40,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-16 16:33:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2021-06-16 16:33:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 131 states have (on average 1.8015267175572518) internal successors, (236), 130 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 236 transitions. [2021-06-16 16:33:40,851 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 236 transitions. Word has length 7 [2021-06-16 16:33:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:40,851 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 236 transitions. [2021-06-16 16:33:40,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 236 transitions. [2021-06-16 16:33:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:40,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:40,853 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:40,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-16 16:33:40,853 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:40,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1224981428, now seen corresponding path program 1 times [2021-06-16 16:33:40,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:40,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326549021] [2021-06-16 16:33:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:40,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:40,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:40,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:40,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:40,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:40,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-16 16:33:40,890 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:40,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:40,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:40,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326549021] [2021-06-16 16:33:40,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326549021] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:40,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:40,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-16 16:33:40,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912528367] [2021-06-16 16:33:40,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-16 16:33:40,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:40,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-16 16:33:40,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:40,894 INFO L87 Difference]: Start difference. First operand 131 states and 236 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:40,909 INFO L93 Difference]: Finished difference Result 139 states and 240 transitions. [2021-06-16 16:33:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-16 16:33:40,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-06-16 16:33:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:40,911 INFO L225 Difference]: With dead ends: 139 [2021-06-16 16:33:40,911 INFO L226 Difference]: Without dead ends: 139 [2021-06-16 16:33:40,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-16 16:33:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2021-06-16 16:33:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 131 states have (on average 1.7328244274809161) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 227 transitions. [2021-06-16 16:33:40,923 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 227 transitions. Word has length 12 [2021-06-16 16:33:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:40,923 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 227 transitions. [2021-06-16 16:33:40,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 227 transitions. [2021-06-16 16:33:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:40,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:40,924 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:40,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-16 16:33:40,924 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:40,924 INFO L82 PathProgramCache]: Analyzing trace with hash 705983668, now seen corresponding path program 2 times [2021-06-16 16:33:40,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:40,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825988206] [2021-06-16 16:33:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-16 16:33:40,930 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-16 16:33:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-16 16:33:40,935 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-16 16:33:40,948 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-16 16:33:40,948 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-16 16:33:40,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-16 16:33:40,949 INFO L301 ceAbstractionStarter]: Result for error location Process1Thread1of1ForFork1 was UNSAFE (4/5) [2021-06-16 16:33:40,950 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:40,951 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:40,951 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:40,951 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:40,951 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:40,951 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:40,951 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:40,951 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:40,952 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process0Thread1of1ForFork0======== [2021-06-16 16:33:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 211 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-16 16:33:41,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:41,000 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-16 16:33:41,001 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1990965056, now seen corresponding path program 1 times [2021-06-16 16:33:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:41,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518260828] [2021-06-16 16:33:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:41,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:41,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:41,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:41,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518260828] [2021-06-16 16:33:41,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518260828] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:41,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:41,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-16 16:33:41,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782309569] [2021-06-16 16:33:41,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:41,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:41,033 INFO L87 Difference]: Start difference. First operand has 212 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 211 states have internal predecessors, (368), 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 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:41,048 INFO L93 Difference]: Finished difference Result 159 states and 281 transitions. [2021-06-16 16:33:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:41,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-06-16 16:33:41,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:41,050 INFO L225 Difference]: With dead ends: 159 [2021-06-16 16:33:41,050 INFO L226 Difference]: Without dead ends: 145 [2021-06-16 16:33:41,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-16 16:33:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2021-06-16 16:33:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 131 states have (on average 1.816793893129771) internal successors, (238), 130 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 238 transitions. [2021-06-16 16:33:41,059 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 238 transitions. Word has length 6 [2021-06-16 16:33:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:41,059 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 238 transitions. [2021-06-16 16:33:41,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 238 transitions. [2021-06-16 16:33:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:41,060 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:41,060 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:41,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-16 16:33:41,060 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -791473366, now seen corresponding path program 1 times [2021-06-16 16:33:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:41,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877181608] [2021-06-16 16:33:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:41,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:41,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:41,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:41,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:41,080 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:41,081 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-16 16:33:41,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:41,088 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:41,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:41,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877181608] [2021-06-16 16:33:41,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877181608] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:41,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:41,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-16 16:33:41,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160433570] [2021-06-16 16:33:41,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-16 16:33:41,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:41,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-16 16:33:41,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:41,090 INFO L87 Difference]: Start difference. First operand 131 states and 238 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:41,102 INFO L93 Difference]: Finished difference Result 137 states and 242 transitions. [2021-06-16 16:33:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-16 16:33:41,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-06-16 16:33:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:41,103 INFO L225 Difference]: With dead ends: 137 [2021-06-16 16:33:41,104 INFO L226 Difference]: Without dead ends: 137 [2021-06-16 16:33:41,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-16 16:33:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-06-16 16:33:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.7925925925925925) internal successors, (242), 136 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 242 transitions. [2021-06-16 16:33:41,111 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 242 transitions. Word has length 12 [2021-06-16 16:33:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:41,111 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 242 transitions. [2021-06-16 16:33:41,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 242 transitions. [2021-06-16 16:33:41,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:41,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:41,112 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:41,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-16 16:33:41,112 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:41,113 INFO L82 PathProgramCache]: Analyzing trace with hash 719296298, now seen corresponding path program 2 times [2021-06-16 16:33:41,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:41,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154516003] [2021-06-16 16:33:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-16 16:33:41,118 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-16 16:33:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-16 16:33:41,122 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-16 16:33:41,124 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-16 16:33:41,124 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-16 16:33:41,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-16 16:33:41,124 INFO L301 ceAbstractionStarter]: Result for error location Process0Thread1of1ForFork0 was UNSAFE (5/5) [2021-06-16 16:33:41,124 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-16 16:33:41,135 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.06 04:33:41 BasicIcfg [2021-06-16 16:33:41,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-16 16:33:41,141 INFO L168 Benchmark]: Toolchain (without parser) took 1330.71 ms. Allocated memory is still 216.0 MB. Free memory was 197.5 MB in the beginning and 136.8 MB in the end (delta: 60.8 MB). Peak memory consumption was 61.7 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:41,141 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.54 ms. Allocated memory is still 216.0 MB. Free memory is still 198.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-16 16:33:41,141 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.95 ms. Allocated memory is still 216.0 MB. Free memory was 197.4 MB in the beginning and 195.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:41,142 INFO L168 Benchmark]: Boogie Preprocessor took 14.19 ms. Allocated memory is still 216.0 MB. Free memory was 195.9 MB in the beginning and 195.0 MB in the end (delta: 943.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:41,142 INFO L168 Benchmark]: RCFGBuilder took 177.59 ms. Allocated memory is still 216.0 MB. Free memory was 194.9 MB in the beginning and 185.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:41,143 INFO L168 Benchmark]: TraceAbstraction took 1115.60 ms. Allocated memory is still 216.0 MB. Free memory was 184.6 MB in the beginning and 136.8 MB in the end (delta: 47.8 MB). Peak memory consumption was 49.1 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:41,144 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 0.54 ms. Allocated memory is still 216.0 MB. Free memory is still 198.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.95 ms. Allocated memory is still 216.0 MB. Free memory was 197.4 MB in the beginning and 195.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.19 ms. Allocated memory is still 216.0 MB. Free memory was 195.9 MB in the beginning and 195.0 MB in the end (delta: 943.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 177.59 ms. Allocated memory is still 216.0 MB. Free memory was 194.9 MB in the beginning and 185.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1115.60 ms. Allocated memory is still 216.0 MB. Free memory was 184.6 MB in the beginning and 136.8 MB in the end (delta: 47.8 MB). Peak memory consumption was 49.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 450, positive: 360, positive conditional: 360, positive unconditional: 0, negative: 90, negative conditional: 90, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 380, positive: 360, positive conditional: 0, positive unconditional: 360, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 133, positive: 123, positive conditional: 0, positive unconditional: 123, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 133, positive: 114, positive conditional: 0, positive unconditional: 114, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 36, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 380, positive: 237, positive conditional: 0, positive unconditional: 237, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 133, unknown conditional: 0, unknown unconditional: 133] , Statistics on independence cache: Total cache size (in pairs): 133, Positive cache size: 123, Positive conditional cache size: 0, Positive unconditional cache size: 123, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Independence queries for same thread: 70 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 450, positive: 360, positive conditional: 360, positive unconditional: 0, negative: 90, negative conditional: 90, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 380, positive: 360, positive conditional: 0, positive unconditional: 360, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 133, positive: 123, positive conditional: 0, positive unconditional: 123, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 133, positive: 114, positive conditional: 0, positive unconditional: 114, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 26, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 380, positive: 237, positive conditional: 0, positive unconditional: 237, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 133, unknown conditional: 0, unknown unconditional: 133] , Statistics on independence cache: Total cache size (in pairs): 133, Positive cache size: 123, Positive conditional cache size: 0, Positive unconditional cache size: 123, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Independence queries for same thread: 70 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 450, positive: 360, positive conditional: 360, positive unconditional: 0, negative: 90, negative conditional: 90, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 380, positive: 360, positive conditional: 0, positive unconditional: 360, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 133, positive: 123, positive conditional: 0, positive unconditional: 123, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 133, positive: 114, positive conditional: 0, positive unconditional: 114, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 65, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 43, negative conditional: 0, negative unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 380, positive: 237, positive conditional: 0, positive unconditional: 237, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 133, unknown conditional: 0, unknown unconditional: 133] , Statistics on independence cache: Total cache size (in pairs): 133, Positive cache size: 123, Positive conditional cache size: 0, Positive unconditional cache size: 123, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Independence queries for same thread: 70 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 450, positive: 360, positive conditional: 360, positive unconditional: 0, negative: 90, negative conditional: 90, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 380, positive: 360, positive conditional: 0, positive unconditional: 360, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 133, positive: 123, positive conditional: 0, positive unconditional: 123, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 133, positive: 114, positive conditional: 0, positive unconditional: 114, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 55, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 380, positive: 237, positive conditional: 0, positive unconditional: 237, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 133, unknown conditional: 0, unknown unconditional: 133] , Statistics on independence cache: Total cache size (in pairs): 133, Positive cache size: 123, Positive conditional cache size: 0, Positive unconditional cache size: 123, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Independence queries for same thread: 70 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 450, positive: 360, positive conditional: 360, positive unconditional: 0, negative: 90, negative conditional: 90, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 380, positive: 360, positive conditional: 0, positive unconditional: 360, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 133, positive: 123, positive conditional: 0, positive unconditional: 123, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 133, positive: 114, positive conditional: 0, positive unconditional: 114, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 27, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 380, positive: 237, positive conditional: 0, positive unconditional: 237, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 133, unknown conditional: 0, unknown unconditional: 133] , Statistics on independence cache: Total cache size (in pairs): 133, Positive cache size: 123, Positive conditional cache size: 0, Positive unconditional cache size: 123, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Independence queries for same thread: 70 - CounterExampleResult [Line: 40]: assertion can be violated assertion can be violated We found a FailurePath: [L25] 0 critical := 0; VAL [critical=0] [L26] FORK 0 fork 0 Process0(); VAL [critical=0] [L37] 1 turn := 1; VAL [critical=0, turn=1] [L27] FORK 0 fork 1 Process1(); VAL [critical=0, turn=1] [L56] 2 flag1 := 1; VAL [critical=0, flag1=1, turn=1] [L57] 2 turn := 0; VAL [critical=0, flag1=1, turn=0] [L58] 2 assume flag0 == 0 || turn == 1; VAL [critical=0, flag0=0, flag1=1, turn=0] [L59] 2 assert critical == 0; VAL [critical=0, flag0=0, flag1=1, turn=0] [L60] 2 critical := 1; VAL [critical=1, flag0=0, flag1=1, turn=0] [L38] 1 flag0 := 1; VAL [critical=1, flag0=1, flag1=1, turn=0] [L39] 1 assume flag1 == 0 || turn == 0; VAL [critical=1, flag0=1, flag1=1, turn=0] [L40] 1 assert critical == 0; VAL [critical=1, flag0=1, flag1=1, turn=0] - CounterExampleResult [Line: 59]: assertion can be violated assertion can be violated We found a FailurePath: [L25] 0 critical := 0; VAL [critical=0] [L26] FORK 0 fork 0 Process0(); VAL [critical=0] [L37] 1 turn := 1; VAL [critical=0, turn=1] [L27] FORK 0 fork 1 Process1(); VAL [critical=0, turn=1] [L56] 2 flag1 := 1; VAL [critical=0, flag1=1, turn=1] [L57] 2 turn := 0; VAL [critical=0, flag1=1, turn=0] [L58] 2 assume flag0 == 0 || turn == 1; VAL [critical=0, flag0=0, flag1=1, turn=0] [L38] 1 flag0 := 1; VAL [critical=0, flag0=1, flag1=1, turn=0] [L39] 1 assume flag1 == 0 || turn == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L40] 1 assert critical == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L41] 1 critical := 1; VAL [critical=1, flag0=1, flag1=1, turn=0] [L59] 2 assert critical == 0; VAL [critical=1, flag0=1, flag1=1, turn=0] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process0 with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 170.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 12.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 154.2ms, PartialOrderReductionTime: 144.5ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process1 with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 96.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 16.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 79.0ms, PartialOrderReductionTime: 77.2ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 109.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 106.9ms, PartialOrderReductionTime: 105.6ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 462.0ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 2.8ms, AutomataDifference: 127.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 76.7ms, PartialOrderReductionTime: 75.5ms, HoareTripleCheckerStatistics: 51 SDtfs, 21 SDslu, 32 SDs, 0 SdLazy, 14 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 22 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.7ms SsaConstructionTime, 18.8ms SatisfiabilityAnalysisTime, 81.5ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 for errors in thread instance: Process0Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 173.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 1.8ms, AutomataDifference: 32.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 47.5ms, PartialOrderReductionTime: 42.7ms, HoareTripleCheckerStatistics: 51 SDtfs, 24 SDslu, 32 SDs, 0 SdLazy, 14 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 14 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.1ms SsaConstructionTime, 7.6ms SatisfiabilityAnalysisTime, 38.7ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 40 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...