/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/chl/exp-term-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 15:49:55,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 15:49:55,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 15:49:55,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 15:49:55,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 15:49:55,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 15:49:55,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 15:49:55,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 15:49:55,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 15:49:55,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 15:49:55,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 15:49:55,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 15:49:55,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 15:49:55,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 15:49:55,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 15:49:55,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 15:49:55,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 15:49:55,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 15:49:55,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 15:49:55,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 15:49:55,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 15:49:55,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 15:49:55,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 15:49:55,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 15:49:55,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 15:49:55,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 15:49:55,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 15:49:55,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 15:49:55,424 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 15:49:55,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 15:49:55,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 15:49:55,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 15:49:55,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 15:49:55,461 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 15:49:55,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 15:49:55,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 15:49:55,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 15:49:55,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 15:49:55,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 15:49:55,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 15:49:55,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 15:49:55,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 15:49:55,462 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 15:49:55,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 15:49:55,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 15:49:55,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 15:49:55,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 15:49:55,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 15:49:55,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 15:49:55,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 15:49:55,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 15:49:55,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 15:49:55,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 15:49:55,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 15:49:55,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 15:49:55,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 15:49:55,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 15:49:55,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 15:49:55,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 15:49:55,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 15:49:55,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 15:49:55,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 15:49:55,785 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 15:49:55,786 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 15:49:55,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-subst.wvr.bpl [2021-06-10 15:49:55,787 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-subst.wvr.bpl' [2021-06-10 15:49:55,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 15:49:55,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 15:49:55,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 15:49:55,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 15:49:55,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 15:49:55,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 15:49:55,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 15:49:55,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 15:49:55,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 15:49:55,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/1) ... [2021-06-10 15:49:55,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 15:49:55,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 15:49:55,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 15:49:55,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 15:49:55,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (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 15:49:55,993 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 15:49:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 15:49:55,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 15:49:55,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 15:49:55,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 15:49:55,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 15:49:55,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 15:49:55,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 15:49:55,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 15:49:55,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-10 15:49:55,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-10 15:49:55,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-10 15:49:55,997 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 15:49:56,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 15:49:56,173 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 15:49:56,175 INFO L202 PluginConnector]: Adding new model exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:49:56 BoogieIcfgContainer [2021-06-10 15:49:56,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 15:49:56,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 15:49:56,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 15:49:56,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 15:49:56,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:55" (1/2) ... [2021-06-10 15:49:56,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed5ef3a and model type exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 03:49:56, skipping insertion in model container [2021-06-10 15:49:56,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:49:56" (2/2) ... [2021-06-10 15:49:56,187 INFO L111 eAbstractionObserver]: Analyzing ICFG exp-term-subst.wvr.bpl [2021-06-10 15:49:56,192 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 15:49:56,196 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 15:49:56,197 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 15:49:56,281 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-10 15:49:56,313 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 15:49:56,347 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 15:49:56,347 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 15:49:56,347 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 15:49:56,347 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 15:49:56,347 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 15:49:56,347 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 15:49:56,347 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 15:49:56,348 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 15:49:56,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-10 15:49:56,400 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-10 15:49:56,400 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 15:49:56,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 15:49:56,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-10 15:49:56,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-10 15:49:56,421 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-10 15:49:56,421 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 15:49:56,422 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:56,423 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:56,423 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:56,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1083414440, now seen corresponding path program 1 times [2021-06-10 15:49:56,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:56,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493173733] [2021-06-10 15:49:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:56,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:56,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:56,827 INFO L142 QuantifierPusher]: treesize reduction 221, result has 32.2 percent of original size [2021-06-10 15:49:56,832 INFO L147 QuantifierPusher]: treesize reduction 9, result has 91.4 percent of original size 96 [2021-06-10 15:49:56,948 INFO L142 QuantifierPusher]: treesize reduction 149, result has 46.8 percent of original size [2021-06-10 15:49:56,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-06-10 15:49:57,149 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-10 15:49:57,169 INFO L142 QuantifierPusher]: treesize reduction 80, result has 53.5 percent of original size [2021-06-10 15:49:57,175 INFO L147 QuantifierPusher]: treesize reduction 6, result has 93.5 percent of original size 86 [2021-06-10 15:49:57,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:57,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:57,272 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 15:49:57,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493173733] [2021-06-10 15:49:57,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:57,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:57,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275965319] [2021-06-10 15:49:57,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:57,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:57,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:57,296 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:57,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 14 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:57,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:57,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:57,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:57,524 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-10 15:49:57,736 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-10 15:49:57,751 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2021-06-10 15:49:57,751 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-06-10 15:49:57,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 40 events. 3/40 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 120 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 50. Up to 7 conditions per place. [2021-06-10 15:49:57,753 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-06-10 15:49:57,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-06-10 15:49:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:57,763 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:57,763 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:57,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:57,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:57,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:57,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 15:49:57,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:57,771 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:57,773 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:57,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-06-10 15:49:57,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-10 15:49:57,777 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-06-10 15:49:57,779 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2021-06-10 15:49:57,780 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-06-10 15:49:57,780 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-06-10 15:49:57,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:57,780 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:57,780 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:57,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 15:49:57,781 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash -207894312, now seen corresponding path program 2 times [2021-06-10 15:49:57,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:57,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438333483] [2021-06-10 15:49:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:57,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:57,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:57,892 INFO L142 QuantifierPusher]: treesize reduction 90, result has 34.8 percent of original size [2021-06-10 15:49:57,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-06-10 15:49:57,959 INFO L142 QuantifierPusher]: treesize reduction 69, result has 47.7 percent of original size [2021-06-10 15:49:57,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-06-10 15:49:58,089 INFO L142 QuantifierPusher]: treesize reduction 97, result has 38.6 percent of original size [2021-06-10 15:49:58,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-06-10 15:49:58,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:58,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:58,145 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 15:49:58,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438333483] [2021-06-10 15:49:58,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:58,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:58,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552551537] [2021-06-10 15:49:58,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:58,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:58,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:58,149 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:58,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:58,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:58,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:58,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:58,310 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-10 15:49:58,461 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-10 15:49:58,475 INFO L129 PetriNetUnfolder]: 2/41 cut-off events. [2021-06-10 15:49:58,475 INFO L130 PetriNetUnfolder]: For 24/27 co-relation queries the response was YES. [2021-06-10 15:49:58,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 41 events. 2/41 cut-off events. For 24/27 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 136 event pairs, 0 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 68. Up to 7 conditions per place. [2021-06-10 15:49:58,476 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-06-10 15:49:58,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 93 flow [2021-06-10 15:49:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:58,484 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:58,484 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:58,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:58,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:58,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:58,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 15:49:58,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:58,488 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:58,488 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:58,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 93 flow [2021-06-10 15:49:58,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 86 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-10 15:49:58,490 INFO L241 Difference]: Finished difference. Result has 29 places, 15 transitions, 59 flow [2021-06-10 15:49:58,490 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=15} [2021-06-10 15:49:58,490 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-10 15:49:58,490 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 15 transitions, 59 flow [2021-06-10 15:49:58,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:58,491 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:58,491 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:58,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 15:49:58,491 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash 816644350, now seen corresponding path program 3 times [2021-06-10 15:49:58,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:58,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995093724] [2021-06-10 15:49:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:58,547 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:58,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:58,554 INFO L142 QuantifierPusher]: treesize reduction 26, result has 52.7 percent of original size [2021-06-10 15:49:58,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-06-10 15:49:58,588 INFO L142 QuantifierPusher]: treesize reduction 11, result has 89.0 percent of original size [2021-06-10 15:49:58,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-06-10 15:49:58,677 INFO L142 QuantifierPusher]: treesize reduction 43, result has 59.8 percent of original size [2021-06-10 15:49:58,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-06-10 15:49:58,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:58,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:58,715 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 15:49:58,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995093724] [2021-06-10 15:49:58,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:58,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:58,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750139809] [2021-06-10 15:49:58,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:58,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:58,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:58,720 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:58,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 15 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:58,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:58,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:58,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:58,886 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-06-10 15:49:58,886 INFO L130 PetriNetUnfolder]: For 42/45 co-relation queries the response was YES. [2021-06-10 15:49:58,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 34 events. 1/34 cut-off events. For 42/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 95 event pairs, 1 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 65. Up to 5 conditions per place. [2021-06-10 15:49:58,887 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-06-10 15:49:58,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 19 transitions, 100 flow [2021-06-10 15:49:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:58,888 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:58,888 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:58,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:58,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:58,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:58,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 15:49:58,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:58,890 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:58,890 INFO L185 Difference]: Start difference. First operand has 29 places, 15 transitions, 59 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:58,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 19 transitions, 100 flow [2021-06-10 15:49:58,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 82 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-06-10 15:49:58,892 INFO L241 Difference]: Finished difference. Result has 31 places, 16 transitions, 70 flow [2021-06-10 15:49:58,892 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=16} [2021-06-10 15:49:58,892 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2021-06-10 15:49:58,892 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 16 transitions, 70 flow [2021-06-10 15:49:58,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:58,892 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:58,892 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:58,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 15:49:58,893 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1228119128, now seen corresponding path program 4 times [2021-06-10 15:49:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:58,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130921531] [2021-06-10 15:49:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:58,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:58,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:58,949 INFO L142 QuantifierPusher]: treesize reduction 149, result has 17.7 percent of original size [2021-06-10 15:49:58,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-06-10 15:49:58,995 INFO L142 QuantifierPusher]: treesize reduction 15, result has 87.2 percent of original size [2021-06-10 15:49:58,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-06-10 15:49:59,092 INFO L142 QuantifierPusher]: treesize reduction 93, result has 54.9 percent of original size [2021-06-10 15:49:59,094 INFO L147 QuantifierPusher]: treesize reduction 13, result has 88.5 percent of original size 100 [2021-06-10 15:49:59,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:59,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:59,164 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 15:49:59,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130921531] [2021-06-10 15:49:59,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:59,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:59,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257931953] [2021-06-10 15:49:59,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:59,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:59,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:59,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:59,166 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:59,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 16 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:59,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:59,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:59,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:59,330 INFO L129 PetriNetUnfolder]: 1/29 cut-off events. [2021-06-10 15:49:59,330 INFO L130 PetriNetUnfolder]: For 34/36 co-relation queries the response was YES. [2021-06-10 15:49:59,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 29 events. 1/29 cut-off events. For 34/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 1 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 63. Up to 5 conditions per place. [2021-06-10 15:49:59,331 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 4/18 dead transitions. [2021-06-10 15:49:59,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 18 transitions, 100 flow [2021-06-10 15:49:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-06-10 15:49:59,333 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8210526315789474 [2021-06-10 15:49:59,334 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-06-10 15:49:59,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-06-10 15:49:59,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:59,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-06-10 15:49:59,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 15:49:59,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:59,335 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:59,335 INFO L185 Difference]: Start difference. First operand has 31 places, 16 transitions, 70 flow. Second operand 5 states and 78 transitions. [2021-06-10 15:49:59,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 18 transitions, 100 flow [2021-06-10 15:49:59,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 18 transitions, 96 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-10 15:49:59,337 INFO L241 Difference]: Finished difference. Result has 34 places, 14 transitions, 57 flow [2021-06-10 15:49:59,337 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=57, PETRI_PLACES=34, PETRI_TRANSITIONS=14} [2021-06-10 15:49:59,337 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2021-06-10 15:49:59,338 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 14 transitions, 57 flow [2021-06-10 15:49:59,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:59,338 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:59,338 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:59,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 15:49:59,338 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:59,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash -456247892, now seen corresponding path program 5 times [2021-06-10 15:49:59,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:59,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214059351] [2021-06-10 15:49:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:59,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:59,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:59,388 INFO L142 QuantifierPusher]: treesize reduction 146, result has 31.1 percent of original size [2021-06-10 15:49:59,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-06-10 15:49:59,448 INFO L142 QuantifierPusher]: treesize reduction 188, result has 41.8 percent of original size [2021-06-10 15:49:59,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-06-10 15:49:59,565 INFO L142 QuantifierPusher]: treesize reduction 165, result has 39.3 percent of original size [2021-06-10 15:49:59,566 INFO L147 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size 101 [2021-06-10 15:49:59,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:59,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:59,623 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 15:49:59,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214059351] [2021-06-10 15:49:59,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:59,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:59,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275978936] [2021-06-10 15:49:59,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:59,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:59,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:59,625 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:59,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 14 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:59,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:59,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:59,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:59,757 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-10 15:49:59,896 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-10 15:49:59,904 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-06-10 15:49:59,904 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-10 15:49:59,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 23 events. 0/23 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 15:49:59,905 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 2/16 dead transitions. [2021-06-10 15:49:59,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 16 transitions, 88 flow [2021-06-10 15:49:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-10 15:49:59,906 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-06-10 15:49:59,906 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-10 15:49:59,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-10 15:49:59,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:59,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-10 15:49:59,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 15:49:59,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:59,908 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:49:59,908 INFO L185 Difference]: Start difference. First operand has 34 places, 14 transitions, 57 flow. Second operand 5 states and 77 transitions. [2021-06-10 15:49:59,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 16 transitions, 88 flow [2021-06-10 15:49:59,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 16 transitions, 60 flow, removed 5 selfloop flow, removed 9 redundant places. [2021-06-10 15:49:59,909 INFO L241 Difference]: Finished difference. Result has 29 places, 14 transitions, 47 flow [2021-06-10 15:49:59,909 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=14} [2021-06-10 15:49:59,910 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-10 15:49:59,910 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 47 flow [2021-06-10 15:49:59,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:49:59,910 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:59,910 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:59,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 15:49:59,910 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:59,911 INFO L82 PathProgramCache]: Analyzing trace with hash -523898182, now seen corresponding path program 6 times [2021-06-10 15:49:59,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:59,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682604022] [2021-06-10 15:49:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:59,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:59,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:59,950 INFO L142 QuantifierPusher]: treesize reduction 73, result has 41.6 percent of original size [2021-06-10 15:49:59,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-06-10 15:50:00,002 INFO L142 QuantifierPusher]: treesize reduction 48, result has 67.1 percent of original size [2021-06-10 15:50:00,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-06-10 15:50:00,095 INFO L142 QuantifierPusher]: treesize reduction 57, result has 55.5 percent of original size [2021-06-10 15:50:00,096 INFO L147 QuantifierPusher]: treesize reduction 3, result has 95.8 percent of original size 68 [2021-06-10 15:50:00,156 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:00,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:00,157 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 15:50:00,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682604022] [2021-06-10 15:50:00,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:50:00,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:50:00,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032600103] [2021-06-10 15:50:00,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:50:00,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:50:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:50:00,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:50:00,158 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:50:00,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 14 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:50:00,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:50:00,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:50:00,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:50:00,308 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-10 15:50:00,454 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-10 15:50:00,457 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-10 15:50:00,458 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-10 15:50:00,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 14 events. 0/14 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 15:50:00,458 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-06-10 15:50:00,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 13 transitions, 55 flow [2021-06-10 15:50:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:50:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:50:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-10 15:50:00,459 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-06-10 15:50:00,459 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-10 15:50:00,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-10 15:50:00,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:50:00,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-10 15:50:00,460 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) [2021-06-10 15:50:00,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:50:00,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 15:50:00,460 INFO L185 Difference]: Start difference. First operand has 29 places, 14 transitions, 47 flow. Second operand 5 states and 75 transitions. [2021-06-10 15:50:00,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 13 transitions, 55 flow [2021-06-10 15:50:00,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-10 15:50:00,461 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-06-10 15:50:00,461 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-06-10 15:50:00,461 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-06-10 15:50:00,462 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-06-10 15:50:00,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 15:50:00,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 15:50:00,465 INFO L202 PluginConnector]: Adding new model exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 03:50:00 BasicIcfg [2021-06-10 15:50:00,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 15:50:00,466 INFO L168 Benchmark]: Toolchain (without parser) took 4592.66 ms. Allocated memory is still 375.4 MB. Free memory was 354.7 MB in the beginning and 182.5 MB in the end (delta: 172.2 MB). Peak memory consumption was 173.7 MB. Max. memory is 16.0 GB. [2021-06-10 15:50:00,466 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 375.4 MB. Free memory is still 355.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:50:00,467 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.01 ms. Allocated memory is still 375.4 MB. Free memory was 354.6 MB in the beginning and 353.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:50:00,467 INFO L168 Benchmark]: Boogie Preprocessor took 16.31 ms. Allocated memory is still 375.4 MB. Free memory was 353.1 MB in the beginning and 352.2 MB in the end (delta: 899.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 15:50:00,468 INFO L168 Benchmark]: RCFGBuilder took 252.95 ms. Allocated memory is still 375.4 MB. Free memory was 352.1 MB in the beginning and 342.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 15:50:00,468 INFO L168 Benchmark]: TraceAbstraction took 4288.22 ms. Allocated memory is still 375.4 MB. Free memory was 341.8 MB in the beginning and 182.5 MB in the end (delta: 159.3 MB). Peak memory consumption was 161.1 MB. Max. memory is 16.0 GB. [2021-06-10 15:50:00,470 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 375.4 MB. Free memory is still 355.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.01 ms. Allocated memory is still 375.4 MB. Free memory was 354.6 MB in the beginning and 353.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.31 ms. Allocated memory is still 375.4 MB. Free memory was 353.1 MB in the beginning and 352.2 MB in the end (delta: 899.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 252.95 ms. Allocated memory is still 375.4 MB. Free memory was 352.1 MB in the beginning and 342.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4288.22 ms. Allocated memory is still 375.4 MB. Free memory was 341.8 MB in the beginning and 182.5 MB in the end (delta: 159.3 MB). Peak memory consumption was 161.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 13.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4135.8ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1766.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 60.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 92 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2808.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=3, InterpolantAutomatonStates: 30, 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: 22.8ms SsaConstructionTime, 113.5ms SatisfiabilityAnalysisTime, 2019.3ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...