/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-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/multiple_fork_same_id.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:21:21,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:21:21,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:21:22,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 22:21:22,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 22:21:22,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 22:21:22,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 22:21:22,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 22:21:22,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 22:21:22,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 22:21:22,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 22:21:22,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-03-24 22:21:22,064 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-PN-SemanticLbe.epf [2021-03-24 22:21:22,095 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:21:22,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:21:22,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:21:22,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:21:22,099 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:21:22,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:21:22,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:21:22,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:21:22,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:21:22,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:21:22,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:21:22,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:21:22,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:21:22,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:21:22,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:21:22,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:21:22,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:21:22,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:21:22,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:21:22,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:21:22,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:21:22,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:21:22,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:21:22,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:21:22,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:21:22,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:21:22,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:21:22,103 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:21:22,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:21:22,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:21:22,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:21:22,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:21:22,429 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:21:22,430 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:21:22,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/multiple_fork_same_id.bpl [2021-03-24 22:21:22,431 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/multiple_fork_same_id.bpl' [2021-03-24 22:21:22,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:21:22,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:21:22,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:21:22,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:21:22,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:21:22,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:21:22,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:21:22,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:21:22,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:21:22,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... [2021-03-24 22:21:22,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:21:22,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:21:22,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:21:22,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:21:22,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:21:22,557 INFO L124 BoogieDeclarations]: Specification and implementation of procedure increment given in one single declaration [2021-03-24 22:21:22,557 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-03-24 22:21:22,557 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-03-24 22:21:22,557 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 22:21:22,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:21:22,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:21:22,558 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 22:21:22,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:21:22,662 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 22:21:22,663 INFO L202 PluginConnector]: Adding new model multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:21:22 BoogieIcfgContainer [2021-03-24 22:21:22,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:21:22,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:21:22,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:21:22,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:21:22,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:22" (1/2) ... [2021-03-24 22:21:22,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6472db39 and model type multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:21:22, skipping insertion in model container [2021-03-24 22:21:22,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:21:22" (2/2) ... [2021-03-24 22:21:22,669 INFO L111 eAbstractionObserver]: Analyzing ICFG multiple_fork_same_id.bpl [2021-03-24 22:21:22,673 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:21:22,676 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 22:21:22,677 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:21:22,696 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,696 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,696 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,697 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,697 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,697 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,697 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,698 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,698 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,698 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,698 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,699 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,701 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,704 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,706 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:22,712 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-24 22:21:22,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 22:21:22,747 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:21:22,747 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:21:22,747 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:21:22,747 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:21:22,747 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:21:22,747 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:21:22,747 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:21:22,748 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:21:22,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 18 transitions, 60 flow [2021-03-24 22:21:22,774 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2021-03-24 22:21:22,774 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 22:21:22,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 21 events. 0/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 46 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 22:21:22,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 18 transitions, 60 flow [2021-03-24 22:21:22,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 13 transitions, 44 flow [2021-03-24 22:21:22,780 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:21:22,790 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 13 transitions, 44 flow [2021-03-24 22:21:22,793 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 13 transitions, 44 flow [2021-03-24 22:21:22,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 13 transitions, 44 flow [2021-03-24 22:21:22,809 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-24 22:21:22,809 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 22:21:22,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 15 events. 0/15 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 22:21:22,811 INFO L142 LiptonReduction]: Number of co-enabled transitions 72 [2021-03-24 22:21:22,852 INFO L154 LiptonReduction]: Checked pairs total: 24 [2021-03-24 22:21:22,852 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 22:21:22,854 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 75 [2021-03-24 22:21:22,863 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-24 22:21:22,863 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 22:21:22,863 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:22,864 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 22:21:22,864 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:22,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:22,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1636388891, now seen corresponding path program 1 times [2021-03-24 22:21:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:22,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269841143] [2021-03-24 22:21:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:23,080 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:23,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:21:23,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:23,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:21:23,128 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-24 22:21:23,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:21:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:21:23,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269841143] [2021-03-24 22:21:23,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:23,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:21:23,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066391163] [2021-03-24 22:21:23,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 22:21:23,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:23,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 22:21:23,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 22:21:23,169 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 21 [2021-03-24 22:21:23,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 10 transitions, 38 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:21:23,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:23,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 21 [2021-03-24 22:21:23,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:23,258 INFO L129 PetriNetUnfolder]: 4/19 cut-off events. [2021-03-24 22:21:23,258 INFO L130 PetriNetUnfolder]: For 16/17 co-relation queries the response was YES. [2021-03-24 22:21:23,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 19 events. 4/19 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 2/21 useless extension candidates. Maximal degree in co-relation 38. Up to 9 conditions per place. [2021-03-24 22:21:23,261 INFO L132 encePairwiseOnDemand]: 17/21 looper letters, 6 selfloop transitions, 2 changer transitions 1/13 dead transitions. [2021-03-24 22:21:23,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 13 transitions, 68 flow [2021-03-24 22:21:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:21:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:21:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-24 22:21:23,271 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2021-03-24 22:21:23,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-24 22:21:23,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-24 22:21:23,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:23,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-24 22:21:23,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:21:23,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:21:23,282 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:21:23,283 INFO L185 Difference]: Start difference. First operand has 18 places, 10 transitions, 38 flow. Second operand 5 states and 75 transitions. [2021-03-24 22:21:23,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 13 transitions, 68 flow [2021-03-24 22:21:23,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 13 transitions, 52 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 22:21:23,291 INFO L241 Difference]: Finished difference. Result has 17 places, 9 transitions, 29 flow [2021-03-24 22:21:23,292 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=29, PETRI_PLACES=17, PETRI_TRANSITIONS=9} [2021-03-24 22:21:23,293 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2021-03-24 22:21:23,293 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 9 transitions, 29 flow [2021-03-24 22:21:23,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:21:23,293 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:23,294 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 22:21:23,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:21:23,294 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1629179500, now seen corresponding path program 1 times [2021-03-24 22:21:23,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:23,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815578021] [2021-03-24 22:21:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:23,313 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:23,324 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:23,338 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:21:23,338 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:21:23,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 22:21:23,353 INFO L202 PluginConnector]: Adding new model multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:21:23 BasicIcfg [2021-03-24 22:21:23,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:21:23,355 INFO L168 Benchmark]: Toolchain (without parser) took 901.48 ms. Allocated memory is still 350.2 MB. Free memory was 330.7 MB in the beginning and 304.6 MB in the end (delta: 26.2 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.0 GB. [2021-03-24 22:21:23,356 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 350.2 MB. Free memory was 331.7 MB in the beginning and 331.6 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:21:23,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.97 ms. Allocated memory is still 350.2 MB. Free memory was 330.7 MB in the beginning and 329.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 22:21:23,357 INFO L168 Benchmark]: Boogie Preprocessor took 11.17 ms. Allocated memory is still 350.2 MB. Free memory was 329.2 MB in the beginning and 328.4 MB in the end (delta: 826.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:21:23,358 INFO L168 Benchmark]: RCFGBuilder took 174.46 ms. Allocated memory is still 350.2 MB. Free memory was 328.3 MB in the beginning and 320.1 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-24 22:21:23,359 INFO L168 Benchmark]: TraceAbstraction took 688.62 ms. Allocated memory is still 350.2 MB. Free memory was 319.6 MB in the beginning and 304.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.0 GB. [2021-03-24 22:21:23,364 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 0.13 ms. Allocated memory is still 350.2 MB. Free memory was 331.7 MB in the beginning and 331.6 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.97 ms. Allocated memory is still 350.2 MB. Free memory was 330.7 MB in the beginning and 329.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.17 ms. Allocated memory is still 350.2 MB. Free memory was 329.2 MB in the beginning and 328.4 MB in the end (delta: 826.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 174.46 ms. Allocated memory is still 350.2 MB. Free memory was 328.3 MB in the beginning and 320.1 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 688.62 ms. Allocated memory is still 350.2 MB. Free memory was 319.6 MB in the beginning and 304.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 59.8ms, 21 PlacesBefore, 18 PlacesAfterwards, 13 TransitionsBefore, 10 TransitionsAfterwards, 72 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 24 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 24, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - CounterExampleResult [Line: 28]: assertion can be violated assertion can be violated We found a FailurePath: [L19] FORK 0 fork 42 increment(7); VAL [n=7] [L20] FORK 0 fork 42 increment(23); VAL [n=7] [L34] 2 res := n + 1; [L21] FORK 0 fork 42 increment(39); VAL [n=39, res=24] [L24] JOIN 2 join 42 assign x; VAL [n=39, res=24, x=24] [L28] 0 assert x == 8 || x == 40; VAL [n=39, res=24, x=24] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 599.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 131.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 111.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7 SDtfs, 9 SDslu, 4 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, InterpolantAutomatonStates: 5, 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: TRACE_CHECK: 5.9ms SsaConstructionTime, 36.8ms SatisfiabilityAnalysisTime, 125.1ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 35 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...