/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/semi1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 18:53:32,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 18:53:32,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 18:53:32,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 18:53:32,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 18:53:32,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 18:53:32,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 18:53:32,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 18:53:32,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 18:53:32,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 18:53:32,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 18:53:32,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 18:53:32,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 18:53:32,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 18:53:32,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 18:53:32,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 18:53:32,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 18:53:32,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 18:53:32,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 18:53:32,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 18:53:32,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 18:53:32,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 18:53:32,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 18:53:32,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 18:53:32,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 18:53:32,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 18:53:32,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 18:53:32,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 18:53:32,942 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-NoLbe.epf [2021-06-10 18:53:32,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 18:53:32,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 18:53:32,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 18:53:32,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 18:53:32,967 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 18:53:32,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 18:53:32,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 18:53:32,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 18:53:32,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 18:53:32,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 18:53:32,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 18:53:32,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 18:53:32,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 18:53:32,968 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 18:53:32,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 18:53:32,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 18:53:32,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 18:53:32,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 18:53:32,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 18:53:32,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 18:53:32,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 18:53:32,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 18:53:33,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 18:53:33,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 18:53:33,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 18:53:33,223 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 18:53:33,224 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 18:53:33,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/semi1.wvr.bpl [2021-06-10 18:53:33,225 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/semi1.wvr.bpl' [2021-06-10 18:53:33,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 18:53:33,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 18:53:33,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 18:53:33,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 18:53:33,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 18:53:33,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 18:53:33,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 18:53:33,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 18:53:33,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 18:53:33,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/1) ... [2021-06-10 18:53:33,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 18:53:33,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 18:53:33,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 18:53:33,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 18:53:33,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (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 18:53:33,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 18:53:33,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 18:53:33,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 18:53:33,350 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 18:53:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 18:53:33,350 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 18:53:33,350 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 18:53:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 18:53:33,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 18:53:33,351 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 18:53:33,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 18:53:33,452 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 18:53:33,453 INFO L202 PluginConnector]: Adding new model semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 06:53:33 BoogieIcfgContainer [2021-06-10 18:53:33,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 18:53:33,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 18:53:33,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 18:53:33,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 18:53:33,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:53:33" (1/2) ... [2021-06-10 18:53:33,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2428b0c0 and model type semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 06:53:33, skipping insertion in model container [2021-06-10 18:53:33,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 06:53:33" (2/2) ... [2021-06-10 18:53:33,458 INFO L111 eAbstractionObserver]: Analyzing ICFG semi1.wvr.bpl [2021-06-10 18:53:33,461 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 18:53:33,464 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 18:53:33,464 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 18:53:33,482 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-10 18:53:33,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-10 18:53:33,508 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 18:53:33,508 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 18:53:33,508 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 18:53:33,508 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 18:53:33,508 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 18:53:33,508 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 18:53:33,508 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 18:53:33,508 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 18:53:33,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 22 places, 15 transitions, 46 flow [2021-06-10 18:53:33,526 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-10 18:53:33,526 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 18:53:33,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 13 events. 0/13 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 18:53:33,528 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 15 transitions, 46 flow [2021-06-10 18:53:33,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 11 transitions, 34 flow [2021-06-10 18:53:33,533 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-06-10 18:53:33,533 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 18:53:33,533 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:53:33,534 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:53:33,534 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:53:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:53:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash 840438715, now seen corresponding path program 1 times [2021-06-10 18:53:33,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:53:33,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619258181] [2021-06-10 18:53:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:53:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:53:33,638 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:53:33,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:53:33,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:53:33,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 18:53:33,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:53:33,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:53:33,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:53:33,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:53:33,681 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 18:53:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619258181] [2021-06-10 18:53:33,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:53:33,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 18:53:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200323960] [2021-06-10 18:53:33,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 18:53:33,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:53:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 18:53:33,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 18:53:33,714 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 15 [2021-06-10 18:53:33,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 18:53:33,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:53:33,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 15 [2021-06-10 18:53:33,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:53:33,764 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-06-10 18:53:33,764 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-10 18:53:33,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 17 events. 0/17 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 18:53:33,765 INFO L132 encePairwiseOnDemand]: 11/15 looper letters, 2 selfloop transitions, 2 changer transitions 2/13 dead transitions. [2021-06-10 18:53:33,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 50 flow [2021-06-10 18:53:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 18:53:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 18:53:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2021-06-10 18:53:33,772 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7833333333333333 [2021-06-10 18:53:33,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 47 transitions. [2021-06-10 18:53:33,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 47 transitions. [2021-06-10 18:53:33,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:53:33,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 47 transitions. [2021-06-10 18:53:33,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 18:53:33,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 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) [2021-06-10 18:53:33,777 INFO L81 ComplementDD]: Finished complementDD. Result has 5 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) [2021-06-10 18:53:33,779 INFO L185 Difference]: Start difference. First operand has 18 places, 11 transitions, 34 flow. Second operand 4 states and 47 transitions. [2021-06-10 18:53:33,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 50 flow [2021-06-10 18:53:33,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 42 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-10 18:53:33,799 INFO L241 Difference]: Finished difference. Result has 18 places, 11 transitions, 36 flow [2021-06-10 18:53:33,800 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=36, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2021-06-10 18:53:33,800 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, 0 predicate places. [2021-06-10 18:53:33,800 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 36 flow [2021-06-10 18:53:33,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 18:53:33,801 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:53:33,801 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:53:33,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 18:53:33,801 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:53:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:53:33,801 INFO L82 PathProgramCache]: Analyzing trace with hash 104585753, now seen corresponding path program 2 times [2021-06-10 18:53:33,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:53:33,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662377697] [2021-06-10 18:53:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:53:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:53:33,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:53:33,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:53:33,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:53:33,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 18:53:33,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:53:33,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:53:33,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:53:33,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:53:33,852 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 18:53:33,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662377697] [2021-06-10 18:53:33,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:53:33,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 18:53:33,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977607489] [2021-06-10 18:53:33,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 18:53:33,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:53:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 18:53:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 18:53:33,855 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 15 [2021-06-10 18:53:33,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 18:53:33,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:53:33,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 15 [2021-06-10 18:53:33,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:53:33,862 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-06-10 18:53:33,862 INFO L130 PetriNetUnfolder]: For 3/4 co-relation queries the response was YES. [2021-06-10 18:53:33,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 9 events. 0/9 cut-off events. For 3/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 2/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 18:53:33,862 INFO L132 encePairwiseOnDemand]: 11/15 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-06-10 18:53:33,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 9 transitions, 36 flow [2021-06-10 18:53:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 18:53:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 18:53:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-06-10 18:53:33,864 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2021-06-10 18:53:33,864 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-06-10 18:53:33,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-06-10 18:53:33,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:53:33,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-06-10 18:53:33,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 18:53:33,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 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) [2021-06-10 18:53:33,865 INFO L81 ComplementDD]: Finished complementDD. Result has 5 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) [2021-06-10 18:53:33,865 INFO L185 Difference]: Start difference. First operand has 18 places, 11 transitions, 36 flow. Second operand 4 states and 44 transitions. [2021-06-10 18:53:33,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 9 transitions, 36 flow [2021-06-10 18:53:33,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 32 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 18:53:33,866 INFO L241 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2021-06-10 18:53:33,866 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2021-06-10 18:53:33,867 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, -2 predicate places. [2021-06-10 18:53:33,867 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2021-06-10 18:53:33,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 18:53:33,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 18:53:33,870 INFO L202 PluginConnector]: Adding new model semi1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 06:53:33 BasicIcfg [2021-06-10 18:53:33,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 18:53:33,871 INFO L168 Benchmark]: Toolchain (without parser) took 605.28 ms. Allocated memory is still 356.5 MB. Free memory was 336.9 MB in the beginning and 319.2 MB in the end (delta: 17.7 MB). Peak memory consumption was 19.1 MB. Max. memory is 16.0 GB. [2021-06-10 18:53:33,872 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 356.5 MB. Free memory was 338.0 MB in the beginning and 337.9 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 18:53:33,872 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.57 ms. Allocated memory is still 356.5 MB. Free memory was 336.8 MB in the beginning and 335.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 18:53:33,873 INFO L168 Benchmark]: Boogie Preprocessor took 9.78 ms. Allocated memory is still 356.5 MB. Free memory was 335.4 MB in the beginning and 334.6 MB in the end (delta: 835.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 18:53:33,873 INFO L168 Benchmark]: RCFGBuilder took 154.47 ms. Allocated memory is still 356.5 MB. Free memory was 334.5 MB in the beginning and 325.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 18:53:33,874 INFO L168 Benchmark]: TraceAbstraction took 416.25 ms. Allocated memory is still 356.5 MB. Free memory was 324.6 MB in the beginning and 319.2 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.0 GB. [2021-06-10 18:53:33,875 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 0.10 ms. Allocated memory is still 356.5 MB. Free memory was 338.0 MB in the beginning and 337.9 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.57 ms. Allocated memory is still 356.5 MB. Free memory was 336.8 MB in the beginning and 335.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.78 ms. Allocated memory is still 356.5 MB. Free memory was 335.4 MB in the beginning and 334.6 MB in the end (delta: 835.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 154.47 ms. Allocated memory is still 356.5 MB. Free memory was 334.5 MB in the beginning and 325.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 416.25 ms. Allocated memory is still 356.5 MB. Free memory was 324.6 MB in the beginning and 319.2 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 362.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 102.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 17 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=1, InterpolantAutomatonStates: 8, 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: 3.2ms SsaConstructionTime, 16.6ms SatisfiabilityAnalysisTime, 120.9ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 66 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...