/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/SpecificationInliningProblem.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 23:55:50,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 23:55:50,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 23:55:50,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-10 23:55:50,119 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 [2021-06-10 23:55:50,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 23:55:50,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 23:55:50,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 23:55:50,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 23:55:50,156 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 23:55:50,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 23:55:50,157 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 23:55:50,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 23:55:50,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 23:55:50,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 23:55:50,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 23:55:50,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 23:55:50,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 23:55:50,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 23:55:50,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 23:55:50,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 23:55:50,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 23:55:50,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 23:55:50,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 23:55:50,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 23:55:50,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 23:55:50,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 23:55:50,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 23:55:50,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 23:55:50,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 23:55:50,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 23:55:50,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 23:55:50,160 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 23:55:50,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 23:55:50,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 23:55:50,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 23:55:50,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 23:55:50,480 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 23:55:50,481 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 23:55:50,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/SpecificationInliningProblem.bpl [2021-06-10 23:55:50,482 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/SpecificationInliningProblem.bpl' [2021-06-10 23:55:50,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 23:55:50,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 23:55:50,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 23:55:50,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 23:55:50,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 23:55:50,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 23:55:50,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 23:55:50,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 23:55:50,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 23:55:50,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/1) ... [2021-06-10 23:55:50,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 23:55:50,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 23:55:50,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 23:55:50,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 23:55:50,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (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 [2021-06-10 23:55:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-06-10 23:55:50,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure pineappleThread given in one single declaration [2021-06-10 23:55:50,619 INFO L130 BoogieDeclarations]: Found specification of procedure pineappleThread [2021-06-10 23:55:50,620 INFO L138 BoogieDeclarations]: Found implementation of procedure pineappleThread [2021-06-10 23:55:50,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 23:55:50,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 23:55:50,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 23:55:50,621 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 23:55:50,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 23:55:50,729 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 23:55:50,730 INFO L202 PluginConnector]: Adding new model SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 11:55:50 BoogieIcfgContainer [2021-06-10 23:55:50,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 23:55:50,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 23:55:50,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 23:55:50,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 23:55:50,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:55:50" (1/2) ... [2021-06-10 23:55:50,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248486d6 and model type SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 11:55:50, skipping insertion in model container [2021-06-10 23:55:50,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 11:55:50" (2/2) ... [2021-06-10 23:55:50,736 INFO L111 eAbstractionObserver]: Analyzing ICFG SpecificationInliningProblem.bpl [2021-06-10 23:55:50,739 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 23:55:50,741 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 23:55:50,742 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 23:55:50,759 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 23:55:50,775 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 23:55:50,793 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 23:55:50,793 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 23:55:50,794 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 23:55:50,794 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 23:55:50,794 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 23:55:50,794 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 23:55:50,794 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 23:55:50,794 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 23:55:50,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 8 transitions, 21 flow [2021-06-10 23:55:50,814 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-06-10 23:55:50,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:55:50,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11 conditions, 7 events. 0/7 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-06-10 23:55:50,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 8 transitions, 21 flow [2021-06-10 23:55:50,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 9 places, 5 transitions, 13 flow [2021-06-10 23:55:50,819 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-10 23:55:50,834 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 9 places, 5 transitions, 13 flow [2021-06-10 23:55:50,840 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 9 places, 5 transitions, 13 flow [2021-06-10 23:55:50,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 9 places, 5 transitions, 13 flow [2021-06-10 23:55:50,846 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-10 23:55:50,846 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:55:50,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9 conditions, 5 events. 0/5 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 0/5 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-06-10 23:55:50,848 INFO L151 LiptonReduction]: Number of co-enabled transitions 4 [2021-06-10 23:55:50,917 INFO L163 LiptonReduction]: Checked pairs total: 2 [2021-06-10 23:55:50,917 INFO L165 LiptonReduction]: Total number of compositions: 1 [2021-06-10 23:55:50,919 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 101 [2021-06-10 23:55:50,949 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 23:55:50,949 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:55:50,949 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:55:50,949 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-06-10 23:55:50,952 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:55:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:55:50,958 INFO L82 PathProgramCache]: Analyzing trace with hash 38015, now seen corresponding path program 1 times [2021-06-10 23:55:50,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:55:50,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977013642] [2021-06-10 23:55:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:55:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:55:51,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:51,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:55:51,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977013642] [2021-06-10 23:55:51,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:55:51,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 23:55:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930630505] [2021-06-10 23:55:51,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 23:55:51,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:55:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 23:55:51,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 23:55:51,099 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 9 [2021-06-10 23:55:51,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 8 places, 4 transitions, 11 flow. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-06-10 23:55:51,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:55:51,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 9 [2021-06-10 23:55:51,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:55:51,145 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-06-10 23:55:51,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:55:51,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12 conditions, 4 events. 0/4 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/5 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 23:55:51,146 INFO L132 encePairwiseOnDemand]: 6/9 looper letters, 1 selfloop transitions, 2 changer transitions 0/4 dead transitions. [2021-06-10 23:55:51,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 4 transitions, 17 flow [2021-06-10 23:55:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 23:55:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 23:55:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 16 transitions. [2021-06-10 23:55:51,155 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2021-06-10 23:55:51,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 16 transitions. [2021-06-10 23:55:51,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 16 transitions. [2021-06-10 23:55:51,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:55:51,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 16 transitions. [2021-06-10 23:55:51,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-06-10 23:55:51,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-06-10 23:55:51,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-06-10 23:55:51,163 INFO L185 Difference]: Start difference. First operand has 8 places, 4 transitions, 11 flow. Second operand 3 states and 16 transitions. [2021-06-10 23:55:51,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 4 transitions, 17 flow [2021-06-10 23:55:51,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 9 places, 4 transitions, 16 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 23:55:51,183 INFO L241 Difference]: Finished difference. Result has 10 places, 4 transitions, 18 flow [2021-06-10 23:55:51,184 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=9, PETRI_DIFFERENCE_MINUEND_FLOW=10, PETRI_DIFFERENCE_MINUEND_PLACES=7, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=18, PETRI_PLACES=10, PETRI_TRANSITIONS=4} [2021-06-10 23:55:51,185 INFO L343 CegarLoopForPetriNet]: 8 programPoint places, 2 predicate places. [2021-06-10 23:55:51,185 INFO L480 AbstractCegarLoop]: Abstraction has has 10 places, 4 transitions, 18 flow [2021-06-10 23:55:51,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-06-10 23:55:51,185 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:55:51,185 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-10 23:55:51,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 23:55:51,185 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:55:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:55:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1178753, now seen corresponding path program 1 times [2021-06-10 23:55:51,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:55:51,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007986749] [2021-06-10 23:55:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:55:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:55:51,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:51,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:51,219 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 23:55:51,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:55:51,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007986749] [2021-06-10 23:55:51,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:55:51,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-10 23:55:51,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658274943] [2021-06-10 23:55:51,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 23:55:51,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:55:51,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 23:55:51,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 23:55:51,230 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 9 [2021-06-10 23:55:51,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 4 transitions, 18 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-06-10 23:55:51,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:55:51,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 9 [2021-06-10 23:55:51,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:55:51,235 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2021-06-10 23:55:51,235 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 23:55:51,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14 conditions, 3 events. 0/3 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/4 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 23:55:51,235 INFO L132 encePairwiseOnDemand]: 6/9 looper letters, 0 selfloop transitions, 0 changer transitions 3/3 dead transitions. [2021-06-10 23:55:51,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 3 transitions, 18 flow [2021-06-10 23:55:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 23:55:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 23:55:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2021-06-10 23:55:51,237 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2021-06-10 23:55:51,237 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 19 transitions. [2021-06-10 23:55:51,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 19 transitions. [2021-06-10 23:55:51,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:55:51,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 19 transitions. [2021-06-10 23:55:51,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-06-10 23:55:51,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-10 23:55:51,238 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-10 23:55:51,238 INFO L185 Difference]: Start difference. First operand has 10 places, 4 transitions, 18 flow. Second operand 4 states and 19 transitions. [2021-06-10 23:55:51,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 3 transitions, 18 flow [2021-06-10 23:55:51,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 9 places, 3 transitions, 12 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-06-10 23:55:51,239 INFO L241 Difference]: Finished difference. Result has 9 places, 0 transitions, 0 flow [2021-06-10 23:55:51,239 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=9, PETRI_DIFFERENCE_MINUEND_FLOW=8, PETRI_DIFFERENCE_MINUEND_PLACES=6, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=9, PETRI_TRANSITIONS=0} [2021-06-10 23:55:51,239 INFO L343 CegarLoopForPetriNet]: 8 programPoint places, 1 predicate places. [2021-06-10 23:55:51,239 INFO L480 AbstractCegarLoop]: Abstraction has has 9 places, 0 transitions, 0 flow [2021-06-10 23:55:51,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-06-10 23:55:51,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 23:55:51,242 INFO L202 PluginConnector]: Adding new model SpecificationInliningProblem.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 11:55:51 BasicIcfg [2021-06-10 23:55:51,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 23:55:51,243 INFO L168 Benchmark]: Toolchain (without parser) took 736.12 ms. Allocated memory is still 396.4 MB. Free memory was 376.7 MB in the beginning and 360.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.0 GB. [2021-06-10 23:55:51,244 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 396.4 MB. Free memory was 377.7 MB in the beginning and 377.6 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 23:55:51,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.45 ms. Allocated memory is still 396.4 MB. Free memory was 376.6 MB in the beginning and 375.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 23:55:51,245 INFO L168 Benchmark]: Boogie Preprocessor took 12.68 ms. Allocated memory is still 396.4 MB. Free memory was 375.1 MB in the beginning and 374.3 MB in the end (delta: 852.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 23:55:51,246 INFO L168 Benchmark]: RCFGBuilder took 182.14 ms. Allocated memory is still 396.4 MB. Free memory was 374.2 MB in the beginning and 366.1 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-10 23:55:51,246 INFO L168 Benchmark]: TraceAbstraction took 510.98 ms. Allocated memory is still 396.4 MB. Free memory was 365.7 MB in the beginning and 360.6 MB in the end (delta: 5.1 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. [2021-06-10 23:55:51,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 396.4 MB. Free memory was 377.7 MB in the beginning and 377.6 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.45 ms. Allocated memory is still 396.4 MB. Free memory was 376.6 MB in the beginning and 375.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.68 ms. Allocated memory is still 396.4 MB. Free memory was 375.1 MB in the beginning and 374.3 MB in the end (delta: 852.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 182.14 ms. Allocated memory is still 396.4 MB. Free memory was 374.2 MB in the beginning and 366.1 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 510.98 ms. Allocated memory is still 396.4 MB. Free memory was 365.7 MB in the beginning and 360.6 MB in the end (delta: 5.1 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 76.8ms, 9 PlacesBefore, 8 PlacesAfterwards, 5 TransitionsBefore, 4 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , Statistics on independence cache: Total cache size (in pairs): 2, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - PositiveResult [Line: 30]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 450.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 100.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 152.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=1, 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.7ms SsaConstructionTime, 15.4ms SatisfiabilityAnalysisTime, 80.4ms InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 27 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...