/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-11 01:29:17,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-11 01:29:17,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-11 01:29:17,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-11 01:29:17,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-11 01:29:17,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-11 01:29:17,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-11 01:29:17,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-11 01:29:17,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-11 01:29:17,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-11 01:29:17,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-11 01:29:17,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-11 01:29:17,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-11 01:29:17,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-11 01:29:17,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-11 01:29:17,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-11 01:29:17,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-11 01:29:17,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-11 01:29:17,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-11 01:29:17,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-11 01:29:17,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-11 01:29:17,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-11 01:29:17,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-11 01:29:17,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-11 01:29:17,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-11 01:29:17,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-11 01:29:17,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-11 01:29:17,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-11 01:29:17,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-06-11 01:29:17,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-11 01:29:17,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-11 01:29:17,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-11 01:29:17,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-11 01:29:17,962 INFO L138 SettingsManager]: * Use SBE=true [2021-06-11 01:29:17,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-11 01:29:17,962 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-11 01:29:17,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-11 01:29:17,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-11 01:29:17,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-11 01:29:17,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-11 01:29:17,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-11 01:29:17,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-11 01:29:17,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-11 01:29:17,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-11 01:29:17,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-11 01:29:17,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-11 01:29:17,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-11 01:29:17,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-11 01:29:17,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-11 01:29:17,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-11 01:29:17,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 01:29:17,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-11 01:29:17,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-11 01:29:17,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-11 01:29:17,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-11 01:29:17,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-11 01:29:17,966 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-11 01:29:17,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-11 01:29:18,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-11 01:29:18,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-11 01:29:18,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-11 01:29:18,259 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-11 01:29:18,260 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-11 01:29:18,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl [2021-06-11 01:29:18,285 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl' [2021-06-11 01:29:18,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-11 01:29:18,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-11 01:29:18,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-11 01:29:18,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-11 01:29:18,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-11 01:29:18,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-11 01:29:18,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-11 01:29:18,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-11 01:29:18,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-11 01:29:18,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/1) ... [2021-06-11 01:29:18,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-11 01:29:18,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-11 01:29:18,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-11 01:29:18,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-11 01:29:18,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (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 [2021-06-11 01:29:18,439 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-11 01:29:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-11 01:29:18,439 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-11 01:29:18,441 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-11 01:29:18,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-11 01:29:18,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-11 01:29:18,442 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-11 01:29:18,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-11 01:29:18,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-11 01:29:18,442 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-11 01:29:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-11 01:29:18,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-11 01:29:18,444 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-11 01:29:18,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-11 01:29:18,597 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-11 01:29:18,599 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 01:29:18 BoogieIcfgContainer [2021-06-11 01:29:18,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-11 01:29:18,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-11 01:29:18,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-11 01:29:18,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-11 01:29:18,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:18" (1/2) ... [2021-06-11 01:29:18,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3752970a and model type simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.06 01:29:18, skipping insertion in model container [2021-06-11 01:29:18,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 01:29:18" (2/2) ... [2021-06-11 01:29:18,610 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-subst.wvr.bpl [2021-06-11 01:29:18,615 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-11 01:29:18,618 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-11 01:29:18,620 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-11 01:29:18,704 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-11 01:29:18,733 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-11 01:29:18,767 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-11 01:29:18,767 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-11 01:29:18,767 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-11 01:29:18,768 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-11 01:29:18,768 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-11 01:29:18,768 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-11 01:29:18,768 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-11 01:29:18,768 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-11 01:29:18,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-11 01:29:18,814 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-11 01:29:18,814 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-11 01:29:18,816 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. [2021-06-11 01:29:18,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-11 01:29:18,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-11 01:29:18,820 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-11 01:29:18,849 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-06-11 01:29:18,853 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-06-11 01:29:18,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-06-11 01:29:18,860 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-11 01:29:18,861 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-11 01:29:18,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 14 events. 0/14 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 01:29:18,863 INFO L151 LiptonReduction]: Number of co-enabled transitions 48 [2021-06-11 01:29:19,084 INFO L163 LiptonReduction]: Checked pairs total: 18 [2021-06-11 01:29:19,085 INFO L165 LiptonReduction]: Total number of compositions: 4 [2021-06-11 01:29:19,090 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 271 [2021-06-11 01:29:19,103 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-06-11 01:29:19,104 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-11 01:29:19,104 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:19,104 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:19,105 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1899370987, now seen corresponding path program 1 times [2021-06-11 01:29:19,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:19,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814414526] [2021-06-11 01:29:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:19,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:19,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:19,345 INFO L142 QuantifierPusher]: treesize reduction 31, result has 66.7 percent of original size [2021-06-11 01:29:19,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-06-11 01:29:19,416 INFO L142 QuantifierPusher]: treesize reduction 27, result has 78.7 percent of original size [2021-06-11 01:29:19,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-06-11 01:29:19,507 INFO L142 QuantifierPusher]: treesize reduction 42, result has 52.8 percent of original size [2021-06-11 01:29:19,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-06-11 01:29:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:19,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814414526] [2021-06-11 01:29:19,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:19,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:19,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197136921] [2021-06-11 01:29:19,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:19,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:19,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:19,574 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:19,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 38 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) [2021-06-11 01:29:19,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:19,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:19,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:19,767 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-06-11 01:29:19,767 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-06-11 01:29:19,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 29 events. 3/29 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 1 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 42. Up to 7 conditions per place. [2021-06-11 01:29:19,770 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-06-11 01:29:19,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-06-11 01:29:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-11 01:29:19,780 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-06-11 01:29:19,781 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-11 01:29:19,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-11 01:29:19,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:19,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-11 01:29:19,786 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) [2021-06-11 01:29:19,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:19,792 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:19,793 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-06-11 01:29:19,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-06-11 01:29:19,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-11 01:29:19,801 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-06-11 01:29:19,803 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=11} [2021-06-11 01:29:19,804 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-06-11 01:29:19,804 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-06-11 01:29:19,804 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) [2021-06-11 01:29:19,804 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:19,804 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:19,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-11 01:29:19,805 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:19,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1456775317, now seen corresponding path program 2 times [2021-06-11 01:29:19,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:19,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308096798] [2021-06-11 01:29:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:19,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:19,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:19,907 INFO L142 QuantifierPusher]: treesize reduction 51, result has 58.2 percent of original size [2021-06-11 01:29:19,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-06-11 01:29:20,014 INFO L142 QuantifierPusher]: treesize reduction 33, result has 75.0 percent of original size [2021-06-11 01:29:20,017 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-06-11 01:29:20,145 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-11 01:29:20,156 INFO L142 QuantifierPusher]: treesize reduction 67, result has 54.4 percent of original size [2021-06-11 01:29:20,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-06-11 01:29:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308096798] [2021-06-11 01:29:20,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:20,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:20,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144138256] [2021-06-11 01:29:20,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:20,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:20,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:20,205 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:20,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 41 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) [2021-06-11 01:29:20,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:20,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:20,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:20,382 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-06-11 01:29:20,382 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-06-11 01:29:20,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 29 events. 2/29 cut-off events. For 24/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2021-06-11 01:29:20,382 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-06-11 01:29:20,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 85 flow [2021-06-11 01:29:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:20,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-11 01:29:20,398 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-06-11 01:29:20,398 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-11 01:29:20,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-11 01:29:20,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:20,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-11 01:29:20,399 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) [2021-06-11 01:29:20,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:20,400 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:20,401 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-06-11 01:29:20,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 85 flow [2021-06-11 01:29:20,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-11 01:29:20,402 INFO L241 Difference]: Finished difference. Result has 25 places, 11 transitions, 51 flow [2021-06-11 01:29:20,402 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=5, PETRI_FLOW=51, PETRI_PLACES=25, PETRI_TRANSITIONS=11} [2021-06-11 01:29:20,403 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-06-11 01:29:20,403 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 11 transitions, 51 flow [2021-06-11 01:29:20,403 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) [2021-06-11 01:29:20,403 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:20,403 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:20,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-11 01:29:20,404 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash 127869563, now seen corresponding path program 3 times [2021-06-11 01:29:20,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:20,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894289660] [2021-06-11 01:29:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:20,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:20,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:20,497 INFO L142 QuantifierPusher]: treesize reduction 77, result has 31.9 percent of original size [2021-06-11 01:29:20,498 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-06-11 01:29:20,526 INFO L142 QuantifierPusher]: treesize reduction 38, result has 72.1 percent of original size [2021-06-11 01:29:20,532 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-06-11 01:29:20,646 INFO L142 QuantifierPusher]: treesize reduction 76, result has 24.8 percent of original size [2021-06-11 01:29:20,647 INFO L147 QuantifierPusher]: treesize reduction 8, result has 68.0 percent of original size 17 [2021-06-11 01:29:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:20,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894289660] [2021-06-11 01:29:20,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:20,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:20,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914555761] [2021-06-11 01:29:20,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:20,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:20,664 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:20,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 11 transitions, 51 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) [2021-06-11 01:29:20,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:20,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:20,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:20,805 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-06-11 01:29:20,805 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-06-11 01:29:20,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 23 events. 1/23 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-06-11 01:29:20,805 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-06-11 01:29:20,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 93 flow [2021-06-11 01:29:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-11 01:29:20,808 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-06-11 01:29:20,808 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-11 01:29:20,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-11 01:29:20,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:20,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-11 01:29:20,809 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) [2021-06-11 01:29:20,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:20,810 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:20,810 INFO L185 Difference]: Start difference. First operand has 25 places, 11 transitions, 51 flow. Second operand 5 states and 79 transitions. [2021-06-11 01:29:20,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 93 flow [2021-06-11 01:29:20,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 74 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-06-11 01:29:20,812 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-06-11 01:29:20,812 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=12} [2021-06-11 01:29:20,812 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-06-11 01:29:20,813 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 12 transitions, 62 flow [2021-06-11 01:29:20,813 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) [2021-06-11 01:29:20,813 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:20,813 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:20,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-11 01:29:20,813 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:20,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1979317449, now seen corresponding path program 4 times [2021-06-11 01:29:20,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:20,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570226533] [2021-06-11 01:29:20,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:20,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:20,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:20,863 INFO L142 QuantifierPusher]: treesize reduction 118, result has 23.4 percent of original size [2021-06-11 01:29:20,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-06-11 01:29:20,884 INFO L142 QuantifierPusher]: treesize reduction 29, result has 79.1 percent of original size [2021-06-11 01:29:20,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-06-11 01:29:20,963 INFO L142 QuantifierPusher]: treesize reduction 95, result has 38.3 percent of original size [2021-06-11 01:29:20,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-06-11 01:29:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:21,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570226533] [2021-06-11 01:29:21,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:21,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:21,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6079752] [2021-06-11 01:29:21,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:21,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:21,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:21,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:21,003 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:21,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 12 transitions, 62 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) [2021-06-11 01:29:21,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:21,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:21,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:21,146 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-06-11 01:29:21,146 INFO L130 PetriNetUnfolder]: For 34/37 co-relation queries the response was YES. [2021-06-11 01:29:21,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 20 events. 1/20 cut-off events. For 34/37 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 1 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2021-06-11 01:29:21,147 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 4/14 dead transitions. [2021-06-11 01:29:21,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 92 flow [2021-06-11 01:29:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-06-11 01:29:21,158 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2021-06-11 01:29:21,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-06-11 01:29:21,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-06-11 01:29:21,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:21,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-06-11 01:29:21,159 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) [2021-06-11 01:29:21,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:21,160 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:21,160 INFO L185 Difference]: Start difference. First operand has 27 places, 12 transitions, 62 flow. Second operand 5 states and 78 transitions. [2021-06-11 01:29:21,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 92 flow [2021-06-11 01:29:21,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 14 transitions, 88 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-11 01:29:21,162 INFO L241 Difference]: Finished difference. Result has 30 places, 10 transitions, 49 flow [2021-06-11 01:29:21,162 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=30, PETRI_TRANSITIONS=10} [2021-06-11 01:29:21,162 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-06-11 01:29:21,162 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 10 transitions, 49 flow [2021-06-11 01:29:21,162 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) [2021-06-11 01:29:21,162 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:21,162 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:21,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-11 01:29:21,163 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:21,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1484480947, now seen corresponding path program 5 times [2021-06-11 01:29:21,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:21,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912685847] [2021-06-11 01:29:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:21,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:21,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:21,213 INFO L142 QuantifierPusher]: treesize reduction 71, result has 45.8 percent of original size [2021-06-11 01:29:21,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-06-11 01:29:21,263 INFO L142 QuantifierPusher]: treesize reduction 124, result has 38.6 percent of original size [2021-06-11 01:29:21,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-06-11 01:29:21,333 INFO L142 QuantifierPusher]: treesize reduction 81, result has 42.1 percent of original size [2021-06-11 01:29:21,335 INFO L147 QuantifierPusher]: treesize reduction 6, result has 89.8 percent of original size 53 [2021-06-11 01:29:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:21,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912685847] [2021-06-11 01:29:21,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:21,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088058345] [2021-06-11 01:29:21,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:21,369 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:21,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 10 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) [2021-06-11 01:29:21,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:21,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:21,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:21,577 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-11 01:29:21,589 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-11 01:29:21,589 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-11 01:29:21,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 16 events. 0/16 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-11 01:29:21,590 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 2/12 dead transitions. [2021-06-11 01:29:21,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 80 flow [2021-06-11 01:29:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-11 01:29:21,595 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-06-11 01:29:21,595 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-11 01:29:21,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-11 01:29:21,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:21,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-11 01:29:21,597 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) [2021-06-11 01:29:21,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:21,598 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:21,598 INFO L185 Difference]: Start difference. First operand has 30 places, 10 transitions, 49 flow. Second operand 5 states and 77 transitions. [2021-06-11 01:29:21,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 80 flow [2021-06-11 01:29:21,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 47 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-06-11 01:29:21,599 INFO L241 Difference]: Finished difference. Result has 23 places, 10 transitions, 35 flow [2021-06-11 01:29:21,599 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=35, PETRI_PLACES=23, PETRI_TRANSITIONS=10} [2021-06-11 01:29:21,599 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-06-11 01:29:21,599 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 10 transitions, 35 flow [2021-06-11 01:29:21,600 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) [2021-06-11 01:29:21,600 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:21,600 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:21,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-11 01:29:21,600 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1092737289, now seen corresponding path program 6 times [2021-06-11 01:29:21,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:21,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780287321] [2021-06-11 01:29:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:21,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:21,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:21,667 INFO L142 QuantifierPusher]: treesize reduction 107, result has 34.0 percent of original size [2021-06-11 01:29:21,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-06-11 01:29:21,714 INFO L142 QuantifierPusher]: treesize reduction 135, result has 42.3 percent of original size [2021-06-11 01:29:21,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-06-11 01:29:21,760 INFO L142 QuantifierPusher]: treesize reduction 104, result has 36.6 percent of original size [2021-06-11 01:29:21,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-06-11 01:29:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:21,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780287321] [2021-06-11 01:29:21,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:21,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:21,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152249094] [2021-06-11 01:29:21,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:21,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:21,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:21,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:21,807 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:21,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 10 transitions, 35 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) [2021-06-11 01:29:21,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:21,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:21,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:21,964 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-06-11 01:29:21,964 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-11 01:29:21,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 10 events. 0/10 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 01:29:21,965 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-06-11 01:29:21,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 44 flow [2021-06-11 01:29:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-11 01:29:21,965 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-06-11 01:29:21,965 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-11 01:29:21,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-11 01:29:21,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:21,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-11 01:29:21,966 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) [2021-06-11 01:29:21,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:21,967 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2021-06-11 01:29:21,967 INFO L185 Difference]: Start difference. First operand has 23 places, 10 transitions, 35 flow. Second operand 5 states and 75 transitions. [2021-06-11 01:29:21,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 44 flow [2021-06-11 01:29:21,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-11 01:29:21,967 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-06-11 01:29:21,967 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=5, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-06-11 01:29:21,968 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-06-11 01:29:21,968 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-06-11 01:29:21,968 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) [2021-06-11 01:29:21,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-11 01:29:21,971 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.06 01:29:21 BasicIcfg [2021-06-11 01:29:21,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-11 01:29:21,972 INFO L168 Benchmark]: Toolchain (without parser) took 3653.72 ms. Allocated memory is still 348.1 MB. Free memory was 328.4 MB in the beginning and 261.5 MB in the end (delta: 66.8 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.0 GB. [2021-06-11 01:29:21,972 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 348.1 MB. Free memory was 329.5 MB in the beginning and 329.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 01:29:21,973 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.81 ms. Allocated memory is still 348.1 MB. Free memory was 328.3 MB in the beginning and 326.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-11 01:29:21,973 INFO L168 Benchmark]: Boogie Preprocessor took 20.06 ms. Allocated memory is still 348.1 MB. Free memory was 326.8 MB in the beginning and 325.9 MB in the end (delta: 969.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 01:29:21,973 INFO L168 Benchmark]: RCFGBuilder took 232.08 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 315.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-11 01:29:21,974 INFO L168 Benchmark]: TraceAbstraction took 3370.21 ms. Allocated memory is still 348.1 MB. Free memory was 315.3 MB in the beginning and 261.5 MB in the end (delta: 53.8 MB). Peak memory consumption was 53.6 MB. Max. memory is 16.0 GB. [2021-06-11 01:29:21,976 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 348.1 MB. Free memory was 329.5 MB in the beginning and 329.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.81 ms. Allocated memory is still 348.1 MB. Free memory was 328.3 MB in the beginning and 326.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.06 ms. Allocated memory is still 348.1 MB. Free memory was 326.8 MB in the beginning and 325.9 MB in the end (delta: 969.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 232.08 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 315.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3370.21 ms. Allocated memory is still 348.1 MB. Free memory was 315.3 MB in the beginning and 261.5 MB in the end (delta: 53.8 MB). Peak memory consumption was 53.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 232.2ms, 24 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 18 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 18, unknown conditional: 0, unknown unconditional: 18] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - 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: 6.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3205.1ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1138.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 329.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1776.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred 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: 7.9ms SsaConstructionTime, 106.3ms SatisfiabilityAnalysisTime, 1456.6ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1388 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...