/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 01:37:32,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 01:37:32,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 01:37:32,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 01:37:32,426 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-Separate.epf [2021-05-22 01:37:32,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 01:37:32,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 01:37:32,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 01:37:32,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 01:37:32,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 01:37:32,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 01:37:32,465 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 01:37:32,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 01:37:32,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 01:37:32,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 01:37:32,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 01:37:32,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 01:37:32,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 01:37:32,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 01:37:32,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 01:37:32,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 01:37:32,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 01:37:32,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 01:37:32,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 01:37:32,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 01:37:32,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 01:37:32,468 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 01:37:32,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 01:37:32,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 01:37:32,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 01:37:32,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 01:37:32,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 01:37:32,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 01:37:32,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 01:37:32,469 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 01:37:32,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 01:37:32,469 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 01:37:32,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 01:37:32,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 01:37:32,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 01:37:32,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 01:37:32,779 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 01:37:32,780 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 01:37:32,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2021-05-22 01:37:32,781 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2021-05-22 01:37:32,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 01:37:32,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 01:37:32,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 01:37:32,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 01:37:32,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 01:37:32,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 01:37:32,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 01:37:32,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 01:37:32,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 01:37:32,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/1) ... [2021-05-22 01:37:32,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 01:37:32,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 01:37:32,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 01:37:32,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 01:37:32,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (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 [2021-05-22 01:37:32,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-05-22 01:37:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-05-22 01:37:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-05-22 01:37:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 01:37:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 01:37:32,887 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 01:37:32,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 01:37:32,995 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 01:37:32,996 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:37:32 BoogieIcfgContainer [2021-05-22 01:37:32,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 01:37:32,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 01:37:32,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 01:37:32,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 01:37:32,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:37:32" (1/2) ... [2021-05-22 01:37:33,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a08937c and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 01:37:33, skipping insertion in model container [2021-05-22 01:37:33,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:37:32" (2/2) ... [2021-05-22 01:37:33,001 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2021-05-22 01:37:33,006 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 01:37:33,006 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 01:37:33,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 01:37:33,007 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 01:37:33,021 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:37:33,022 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:37:33,022 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:37:33,022 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:37:33,024 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:37:33,024 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:37:33,029 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-05-22 01:37:33,046 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:37:33,061 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:37:33,061 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:37:33,061 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:37:33,061 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:37:33,062 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:37:33,062 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:37:33,062 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:37:33,062 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:37:33,068 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 16 transitions, 40 flow [2021-05-22 01:37:33,075 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-05-22 01:37:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-05-22 01:37:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-22 01:37:33,079 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:37:33,080 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:37:33,080 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:37:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:37:33,084 INFO L82 PathProgramCache]: Analyzing trace with hash 207802977, now seen corresponding path program 1 times [2021-05-22 01:37:33,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:37:33,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561415597] [2021-05-22 01:37:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:37:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:37:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:37:33,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:37:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561415597] [2021-05-22 01:37:33,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561415597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:37:33,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:37:33,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:37:33,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395601075] [2021-05-22 01:37:33,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:37:33,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:37:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:37:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:37:33,215 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-05-22 01:37:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:37:33,244 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-05-22 01:37:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:37:33,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-05-22 01:37:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:37:33,251 INFO L225 Difference]: With dead ends: 26 [2021-05-22 01:37:33,251 INFO L226 Difference]: Without dead ends: 24 [2021-05-22 01:37:33,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:37:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-22 01:37:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-22 01:37:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:37:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-22 01:37:33,276 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 10 [2021-05-22 01:37:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:37:33,276 INFO L482 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-22 01:37:33,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-05-22 01:37:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-22 01:37:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 01:37:33,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:37:33,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-05-22 01:37:33,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 01:37:33,277 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:37:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:37:33,278 INFO L82 PathProgramCache]: Analyzing trace with hash 539347588, now seen corresponding path program 1 times [2021-05-22 01:37:33,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:37:33,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690033938] [2021-05-22 01:37:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:37:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:37:33,288 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:37:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:37:33,295 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:37:33,323 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:37:33,323 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:37:33,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 01:37:33,325 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2021-05-22 01:37:33,327 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:37:33,329 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:37:33,329 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:37:33,329 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:37:33,329 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:37:33,329 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:37:33,329 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:37:33,330 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:37:33,330 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:37:33,331 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 16 transitions, 40 flow [2021-05-22 01:37:33,331 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-05-22 01:37:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-05-22 01:37:33,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:37:33,332 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 01:37:33,333 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 01:37:33,343 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 01:37:33 BasicIcfg [2021-05-22 01:37:33,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 01:37:33,345 INFO L168 Benchmark]: Toolchain (without parser) took 541.69 ms. Allocated memory is still 396.4 MB. Free memory was 375.4 MB in the beginning and 364.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.0 GB. [2021-05-22 01:37:33,345 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 396.4 MB. Free memory was 376.4 MB in the beginning and 376.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 01:37:33,346 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.93 ms. Allocated memory is still 396.4 MB. Free memory was 375.3 MB in the beginning and 373.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 01:37:33,347 INFO L168 Benchmark]: Boogie Preprocessor took 9.84 ms. Allocated memory is still 396.4 MB. Free memory was 373.9 MB in the beginning and 373.0 MB in the end (delta: 893.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-05-22 01:37:33,347 INFO L168 Benchmark]: RCFGBuilder took 161.38 ms. Allocated memory is still 396.4 MB. Free memory was 372.9 MB in the beginning and 363.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-05-22 01:37:33,348 INFO L168 Benchmark]: TraceAbstraction took 346.48 ms. Allocated memory is still 396.4 MB. Free memory was 363.4 MB in the beginning and 364.2 MB in the end (delta: -824.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 01:37:33,351 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 0.14 ms. Allocated memory is still 396.4 MB. Free memory was 376.4 MB in the beginning and 376.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.93 ms. Allocated memory is still 396.4 MB. Free memory was 375.3 MB in the beginning and 373.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.84 ms. Allocated memory is still 396.4 MB. Free memory was 373.9 MB in the beginning and 373.0 MB in the end (delta: 893.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 161.38 ms. Allocated memory is still 396.4 MB. Free memory was 372.9 MB in the beginning and 363.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 346.48 ms. Allocated memory is still 396.4 MB. Free memory was 363.4 MB in the beginning and 364.2 MB in the end (delta: -824.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 res := 0; VAL [res=0] [L18] 0 x := 0; VAL [res=0, x=0] [L20] COND TRUE 0 x < 3 VAL [res=0, x=0] [L21] FORK 0 fork x foo(); VAL [res=0, x=0] [L35] 1 res := y; VAL [res=2, res=0, x=0, y=2] [L22] 0 resOld := res; VAL [res=2, res=0, resOld=0, x=0, y=2] [L23] JOIN 1 join x assign res; VAL [res=2, res=2, resOld=0, x=0, y=2] [L24] COND FALSE 0 !(x > 0) VAL [res=2, res=2, resOld=0, x=0, y=2] [L27] 0 x := x + 1; VAL [res=2, res=2, resOld=0, x=1, y=2] [L20] COND TRUE 0 x < 3 VAL [res=2, res=2, resOld=0, x=1, y=2] [L21] FORK 0 fork x foo(); VAL [res=2, resOld=0, x=1] [L35] 1 res := y; VAL [res=2, res=3, resOld=0, x=1, y=3] [L22] 0 resOld := res; VAL [res=2, res=3, resOld=2, x=1, y=3] [L23] JOIN 1 join x assign res; VAL [res=3, res=3, resOld=2, x=1, y=3] [L24] COND TRUE 0 x > 0 VAL [res=3, res=3, resOld=2, x=1, y=3] [L25] 0 assert resOld == res; VAL [res=3, res=3, resOld=2, x=1, y=3] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 265.6ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 4.8ms, AutomataDifference: 47.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10 SDtfs, 1 SDslu, 7 SDs, 0 SdLazy, 11 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.2ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.4ms SsaConstructionTime, 20.8ms SatisfiabilityAnalysisTime, 38.2ms InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 23 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 for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...