/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/collitem-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 23:35:28,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 23:35:28,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 23:35:28,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 23:35:28,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 23:35:28,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 23:35:28,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 23:35:28,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 23:35:28,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 23:35:28,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 23:35:28,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 23:35:28,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 23:35:28,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 23:35:28,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 23:35:28,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 23:35:28,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 23:35:28,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 23:35:28,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 23:35:28,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 23:35:28,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 23:35:28,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 23:35:28,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 23:35:28,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 23:35:28,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 23:35:28,734 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 23:35:28,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 23:35:28,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 23:35:28,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 23:35:28,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 23:35:28,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 23:35:28,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 23:35:28,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 23:35:28,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 23:35:28,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 23:35:28,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 23:35:28,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 23:35:28,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-24 23:35:28,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 23:35:28,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 23:35:28,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 23:35:28,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 23:35:28,786 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 23:35:28,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 23:35:28,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 23:35:28,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 23:35:28,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 23:35:28,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 23:35:28,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 23:35:28,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 23:35:28,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 23:35:28,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 23:35:28,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 23:35:28,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 23:35:28,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 23:35:28,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 23:35:28,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 23:35:28,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 23:35:28,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 23:35:28,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 23:35:28,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 23:35:28,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 23:35:28,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 23:35:28,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 23:35:28,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 23:35:28,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 23:35:28,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 23:35:29,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 23:35:29,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 23:35:29,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 23:35:29,082 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 23:35:29,083 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 23:35:29,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl [2021-03-24 23:35:29,084 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl' [2021-03-24 23:35:29,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 23:35:29,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 23:35:29,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 23:35:29,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 23:35:29,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 23:35:29,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 23:35:29,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 23:35:29,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 23:35:29,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 23:35:29,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... [2021-03-24 23:35:29,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 23:35:29,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 23:35:29,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 23:35:29,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 23:35:29,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 23:35:29,212 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 23:35:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 23:35:29,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 23:35:29,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 23:35:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 23:35:29,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 23:35:29,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 23:35:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 23:35:29,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 23:35:29,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 23:35:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 23:35:29,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 23:35:29,214 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 23:35:29,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 23:35:29,443 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 23:35:29,444 INFO L202 PluginConnector]: Adding new model collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:35:29 BoogieIcfgContainer [2021-03-24 23:35:29,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 23:35:29,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 23:35:29,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 23:35:29,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 23:35:29,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:35:29" (1/2) ... [2021-03-24 23:35:29,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c51862d and model type collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 11:35:29, skipping insertion in model container [2021-03-24 23:35:29,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:35:29" (2/2) ... [2021-03-24 23:35:29,450 INFO L111 eAbstractionObserver]: Analyzing ICFG collitem-trans.wvr.bpl [2021-03-24 23:35:29,454 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 23:35:29,457 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 23:35:29,458 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 23:35:29,486 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-24 23:35:29,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 23:35:29,525 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 23:35:29,525 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 23:35:29,525 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 23:35:29,525 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 23:35:29,526 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 23:35:29,526 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 23:35:29,526 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 23:35:29,526 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 23:35:29,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 23:35:29,594 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 23:35:29,594 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 23:35:29,596 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. [2021-03-24 23:35:29,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 23:35:29,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-24 23:35:29,600 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 23:35:29,622 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 23:35:29,632 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 23:35:29,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-24 23:35:29,645 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 23:35:29,646 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 23:35:29,646 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 14 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. [2021-03-24 23:35:29,647 INFO L142 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-24 23:35:29,807 INFO L154 LiptonReduction]: Checked pairs total: 18 [2021-03-24 23:35:29,807 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 23:35:29,809 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 210 [2021-03-24 23:35:29,825 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-24 23:35:29,825 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 23:35:29,825 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:35:29,826 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:35:29,826 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:35:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:35:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1809114803, now seen corresponding path program 1 times [2021-03-24 23:35:29,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:35:29,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043547504] [2021-03-24 23:35:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:35:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:35:30,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:30,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:35:30,431 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 114 [2021-03-24 23:35:30,434 INFO L142 QuantifierPusher]: treesize reduction 2787, result has 23.2 percent of original size [2021-03-24 23:35:30,448 INFO L147 QuantifierPusher]: treesize reduction 385, result has 54.4 percent of original size 459 [2021-03-24 23:35:30,673 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 39 [2021-03-24 23:35:30,733 INFO L142 QuantifierPusher]: treesize reduction 1339, result has 34.0 percent of original size [2021-03-24 23:35:30,743 INFO L147 QuantifierPusher]: treesize reduction 55, result has 92.0 percent of original size 635 [2021-03-24 23:35:30,999 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 53 [2021-03-24 23:35:31,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:31,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 23:35:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:35:31,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043547504] [2021-03-24 23:35:31,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:35:31,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 23:35:31,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729525543] [2021-03-24 23:35:31,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 23:35:31,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:35:31,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 23:35:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 23:35:31,062 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 23:35:31,064 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) [2021-03-24 23:35:31,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:35:31,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 23:35:31,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:35:31,312 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-03-24 23:35:31,312 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-24 23:35:31,314 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 6. Compared 81 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. [2021-03-24 23:35:31,315 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-03-24 23:35:31,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-03-24 23:35:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 23:35:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 23:35:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 23:35:31,324 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 23:35:31,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 23:35:31,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 23:35:31,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:35:31,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 23:35:31,334 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) [2021-03-24 23:35:31,337 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) [2021-03-24 23:35:31,337 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) [2021-03-24 23:35:31,339 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-03-24 23:35:31,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-03-24 23:35:31,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 23:35:31,343 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-03-24 23:35:31,344 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} [2021-03-24 23:35:31,345 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-24 23:35:31,345 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-03-24 23:35:31,345 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) [2021-03-24 23:35:31,345 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:35:31,345 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:35:31,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 23:35:31,345 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:35:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:35:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash 840283623, now seen corresponding path program 2 times [2021-03-24 23:35:31,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:35:31,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445353108] [2021-03-24 23:35:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:35:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:35:31,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:31,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:35:31,663 INFO L142 QuantifierPusher]: treesize reduction 9033, result has 20.9 percent of original size [2021-03-24 23:35:31,689 INFO L147 QuantifierPusher]: treesize reduction 123, result has 94.8 percent of original size 2264 [2021-03-24 23:35:32,256 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 49 [2021-03-24 23:35:32,267 INFO L142 QuantifierPusher]: treesize reduction 825, result has 45.8 percent of original size [2021-03-24 23:35:32,272 INFO L147 QuantifierPusher]: treesize reduction 336, result has 51.7 percent of original size 360 [2021-03-24 23:35:32,428 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2021-03-24 23:35:32,440 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:32,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 23:35:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:35:32,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445353108] [2021-03-24 23:35:32,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:35:32,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 23:35:32,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16733547] [2021-03-24 23:35:32,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 23:35:32,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:35:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 23:35:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 23:35:32,466 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 23:35:32,466 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) [2021-03-24 23:35:32,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:35:32,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 23:35:32,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:35:32,637 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2021-03-24 23:35:32,835 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-03-24 23:35:32,847 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-03-24 23:35:32,848 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-03-24 23:35:32,848 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. [2021-03-24 23:35:32,849 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-24 23:35:32,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 85 flow [2021-03-24 23:35:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 23:35:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 23:35:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 23:35:32,852 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 23:35:32,852 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 23:35:32,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 23:35:32,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:35:32,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 23:35:32,853 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) [2021-03-24 23:35:32,854 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) [2021-03-24 23:35:32,854 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) [2021-03-24 23:35:32,854 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-03-24 23:35:32,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 85 flow [2021-03-24 23:35:32,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-24 23:35:32,856 INFO L241 Difference]: Finished difference. Result has 25 places, 11 transitions, 51 flow [2021-03-24 23:35:32,856 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} [2021-03-24 23:35:32,856 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-03-24 23:35:32,857 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 11 transitions, 51 flow [2021-03-24 23:35:32,857 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) [2021-03-24 23:35:32,857 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:35:32,857 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:35:32,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 23:35:32,857 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:35:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:35:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash -31273989, now seen corresponding path program 3 times [2021-03-24 23:35:32,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:35:32,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131123132] [2021-03-24 23:35:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:35:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:35:32,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:32,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:35:32,976 INFO L142 QuantifierPusher]: treesize reduction 1977, result has 27.9 percent of original size [2021-03-24 23:35:32,980 INFO L147 QuantifierPusher]: treesize reduction 166, result has 78.3 percent of original size 598 [2021-03-24 23:35:33,144 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 33 [2021-03-24 23:35:33,225 INFO L142 QuantifierPusher]: treesize reduction 18199, result has 7.9 percent of original size [2021-03-24 23:35:33,238 INFO L147 QuantifierPusher]: treesize reduction 336, result has 78.5 percent of original size 1227 [2021-03-24 23:35:33,605 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 45 [2021-03-24 23:35:33,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:33,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 23:35:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:35:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131123132] [2021-03-24 23:35:33,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:35:33,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 23:35:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622613057] [2021-03-24 23:35:33,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 23:35:33,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:35:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 23:35:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 23:35:33,630 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 23:35:33,630 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) [2021-03-24 23:35:33,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:35:33,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 23:35:33,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:35:33,819 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-03-24 23:35:33,819 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-24 23:35:33,819 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. [2021-03-24 23:35:33,819 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-03-24 23:35:33,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 93 flow [2021-03-24 23:35:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 23:35:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 23:35:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 23:35:33,822 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 23:35:33,822 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 23:35:33,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 23:35:33,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:35:33,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 23:35:33,824 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) [2021-03-24 23:35:33,824 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) [2021-03-24 23:35:33,825 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) [2021-03-24 23:35:33,825 INFO L185 Difference]: Start difference. First operand has 25 places, 11 transitions, 51 flow. Second operand 5 states and 79 transitions. [2021-03-24 23:35:33,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 93 flow [2021-03-24 23:35:33,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 74 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-24 23:35:33,827 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-03-24 23:35:33,827 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} [2021-03-24 23:35:33,827 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-03-24 23:35:33,827 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 12 transitions, 62 flow [2021-03-24 23:35:33,827 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) [2021-03-24 23:35:33,828 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:35:33,828 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:35:33,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 23:35:33,828 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:35:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:35:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash -15909717, now seen corresponding path program 4 times [2021-03-24 23:35:33,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:35:33,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420681385] [2021-03-24 23:35:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:35:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:35:33,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:33,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:35:33,955 INFO L142 QuantifierPusher]: treesize reduction 28376, result has 3.6 percent of original size [2021-03-24 23:35:33,961 INFO L147 QuantifierPusher]: treesize reduction 140, result has 86.7 percent of original size 913 [2021-03-24 23:35:34,113 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 35 [2021-03-24 23:35:34,129 INFO L142 QuantifierPusher]: treesize reduction 979, result has 29.2 percent of original size [2021-03-24 23:35:34,137 INFO L147 QuantifierPusher]: treesize reduction 268, result has 33.5 percent of original size 135 [2021-03-24 23:35:34,261 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-03-24 23:35:34,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:34,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 23:35:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:35:34,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420681385] [2021-03-24 23:35:34,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:35:34,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 23:35:34,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333598637] [2021-03-24 23:35:34,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 23:35:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:35:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 23:35:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 23:35:34,286 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 23:35:34,286 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) [2021-03-24 23:35:34,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:35:34,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 23:35:34,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:35:34,449 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-24 23:35:34,449 INFO L130 PetriNetUnfolder]: For 34/37 co-relation queries the response was YES. [2021-03-24 23:35:34,450 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. [2021-03-24 23:35:34,451 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 4/14 dead transitions. [2021-03-24 23:35:34,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 92 flow [2021-03-24 23:35:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 23:35:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 23:35:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-03-24 23:35:34,456 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2021-03-24 23:35:34,456 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-03-24 23:35:34,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-03-24 23:35:34,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:35:34,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-03-24 23:35:34,459 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) [2021-03-24 23:35:34,461 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) [2021-03-24 23:35:34,462 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) [2021-03-24 23:35:34,462 INFO L185 Difference]: Start difference. First operand has 27 places, 12 transitions, 62 flow. Second operand 5 states and 78 transitions. [2021-03-24 23:35:34,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 92 flow [2021-03-24 23:35:34,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 14 transitions, 88 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 23:35:34,463 INFO L241 Difference]: Finished difference. Result has 30 places, 10 transitions, 49 flow [2021-03-24 23:35:34,464 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} [2021-03-24 23:35:34,464 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-03-24 23:35:34,464 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 10 transitions, 49 flow [2021-03-24 23:35:34,464 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) [2021-03-24 23:35:34,464 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:35:34,464 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:35:34,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 23:35:34,465 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:35:34,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:35:34,465 INFO L82 PathProgramCache]: Analyzing trace with hash 815259183, now seen corresponding path program 5 times [2021-03-24 23:35:34,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:35:34,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520547027] [2021-03-24 23:35:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:35:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:35:34,561 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:34,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:35:34,612 INFO L142 QuantifierPusher]: treesize reduction 9632, result has 18.3 percent of original size [2021-03-24 23:35:34,626 INFO L147 QuantifierPusher]: treesize reduction 312, result has 85.6 percent of original size 1848 [2021-03-24 23:35:35,101 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 50 [2021-03-24 23:35:35,119 INFO L142 QuantifierPusher]: treesize reduction 1376, result has 40.8 percent of original size [2021-03-24 23:35:35,125 INFO L147 QuantifierPusher]: treesize reduction 184, result has 80.6 percent of original size 766 [2021-03-24 23:35:35,399 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 56 [2021-03-24 23:35:35,400 INFO L142 QuantifierPusher]: treesize reduction 16, result has 59.0 percent of original size [2021-03-24 23:35:35,400 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 23:35:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:35:35,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520547027] [2021-03-24 23:35:35,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:35:35,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 23:35:35,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983935186] [2021-03-24 23:35:35,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 23:35:35,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:35:35,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 23:35:35,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 23:35:35,417 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 23:35:35,418 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) [2021-03-24 23:35:35,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:35:35,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 23:35:35,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:35:35,663 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-03-24 23:35:35,940 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2021-03-24 23:35:35,947 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 23:35:35,948 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 23:35:35,948 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. [2021-03-24 23:35:35,948 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 2/12 dead transitions. [2021-03-24 23:35:35,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 80 flow [2021-03-24 23:35:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 23:35:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 23:35:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-24 23:35:35,949 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-03-24 23:35:35,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-24 23:35:35,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-24 23:35:35,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:35:35,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-24 23:35:35,950 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) [2021-03-24 23:35:35,951 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) [2021-03-24 23:35:35,951 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) [2021-03-24 23:35:35,951 INFO L185 Difference]: Start difference. First operand has 30 places, 10 transitions, 49 flow. Second operand 5 states and 77 transitions. [2021-03-24 23:35:35,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 80 flow [2021-03-24 23:35:35,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 47 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-03-24 23:35:35,952 INFO L241 Difference]: Finished difference. Result has 23 places, 10 transitions, 35 flow [2021-03-24 23:35:35,952 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} [2021-03-24 23:35:35,953 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-03-24 23:35:35,953 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 10 transitions, 35 flow [2021-03-24 23:35:35,953 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) [2021-03-24 23:35:35,953 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:35:35,953 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:35:35,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 23:35:35,953 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:35:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:35:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -902489877, now seen corresponding path program 6 times [2021-03-24 23:35:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:35:35,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361432450] [2021-03-24 23:35:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:35:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:35:35,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:35,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:35:36,059 INFO L142 QuantifierPusher]: treesize reduction 26263, result has 10.8 percent of original size [2021-03-24 23:35:36,069 INFO L147 QuantifierPusher]: treesize reduction 2159, result has 31.8 percent of original size 1007 [2021-03-24 23:35:36,311 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 37 [2021-03-24 23:35:36,327 INFO L142 QuantifierPusher]: treesize reduction 1093, result has 20.9 percent of original size [2021-03-24 23:35:36,329 INFO L147 QuantifierPusher]: treesize reduction 144, result has 50.2 percent of original size 145 [2021-03-24 23:35:36,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:35:36,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 23:35:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:35:36,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361432450] [2021-03-24 23:35:36,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:35:36,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 23:35:36,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634437331] [2021-03-24 23:35:36,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 23:35:36,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:35:36,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 23:35:36,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 23:35:36,414 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 23:35:36,414 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) [2021-03-24 23:35:36,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:35:36,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 23:35:36,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:35:36,548 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 23:35:36,548 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-24 23:35:36,548 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. [2021-03-24 23:35:36,549 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-24 23:35:36,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 44 flow [2021-03-24 23:35:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 23:35:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 23:35:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-24 23:35:36,549 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-03-24 23:35:36,549 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-24 23:35:36,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-24 23:35:36,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:35:36,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-24 23:35:36,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:35:36,550 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) [2021-03-24 23:35:36,550 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) [2021-03-24 23:35:36,550 INFO L185 Difference]: Start difference. First operand has 23 places, 10 transitions, 35 flow. Second operand 5 states and 75 transitions. [2021-03-24 23:35:36,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 44 flow [2021-03-24 23:35:36,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 23:35:36,551 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-24 23:35:36,551 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} [2021-03-24 23:35:36,551 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-24 23:35:36,551 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-24 23:35:36,552 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) [2021-03-24 23:35:36,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 23:35:36,555 INFO L202 PluginConnector]: Adding new model collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 11:35:36 BasicIcfg [2021-03-24 23:35:36,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 23:35:36,556 INFO L168 Benchmark]: Toolchain (without parser) took 7448.29 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 236.8 MB in the beginning and 421.1 MB in the end (delta: -184.3 MB). Peak memory consumption was 84.4 MB. Max. memory is 16.0 GB. [2021-03-24 23:35:36,556 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 23:35:36,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.23 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 23:35:36,557 INFO L168 Benchmark]: Boogie Preprocessor took 14.36 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 23:35:36,557 INFO L168 Benchmark]: RCFGBuilder took 295.44 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 233.9 MB in the end (delta: 223.1 kB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. [2021-03-24 23:35:36,558 INFO L168 Benchmark]: TraceAbstraction took 7109.50 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 233.2 MB in the beginning and 421.1 MB in the end (delta: -188.0 MB). Peak memory consumption was 80.1 MB. Max. memory is 16.0 GB. [2021-03-24 23:35:36,560 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.23 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.36 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 295.44 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 233.9 MB in the end (delta: 223.1 kB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 7109.50 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 233.2 MB in the beginning and 421.1 MB in the end (delta: -188.0 MB). Peak memory consumption was 80.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 175.5ms, 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): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 68]: 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: 4.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 7031.6ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1733.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 294.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 115.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4603.5ms 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: 14.0ms SsaConstructionTime, 220.3ms SatisfiabilityAnalysisTime, 4601.1ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1801 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...