/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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 17:42:45,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 17:42:45,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 17:42:45,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 17:42:45,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 17:42:45,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 17:42:45,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 17:42:45,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 17:42:45,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 17:42:45,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 17:42:45,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 17:42:45,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 17:42:45,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 17:42:45,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 17:42:45,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 17:42:45,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 17:42:45,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 17:42:45,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 17:42:45,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 17:42:45,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 17:42:45,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 17:42:45,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 17:42:45,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 17:42:45,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 17:42:45,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 17:42:45,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 17:42:45,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 17:42:45,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 17:42:45,752 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-VariableLbe.epf [2021-03-24 17:42:45,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 17:42:45,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 17:42:45,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 17:42:45,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 17:42:45,785 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 17:42:45,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 17:42:45,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 17:42:45,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 17:42:45,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 17:42:45,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 17:42:45,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 17:42:45,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 17:42:45,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 17:42:45,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 17:42:45,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 17:42:45,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 17:42:45,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 17:42:45,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 17:42:45,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 17:42:45,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 17:42:45,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 17:42:45,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 17:42:45,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 17:42:45,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 17:42:45,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 17:42:45,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 17:42:45,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 17:42:45,788 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 17:42:45,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 17:42:45,788 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 17:42:46,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 17:42:46,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 17:42:46,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 17:42:46,058 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 17:42:46,059 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 17:42:46,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-03-24 17:42:46,060 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-03-24 17:42:46,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 17:42:46,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 17:42:46,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 17:42:46,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 17:42:46,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 17:42:46,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 17:42:46,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 17:42:46,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 17:42:46,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 17:42:46,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/1) ... [2021-03-24 17:42:46,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 17:42:46,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 17:42:46,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 17:42:46,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 17:42:46,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (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 17:42:46,203 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 17:42:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 17:42:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 17:42:46,205 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 17:42:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 17:42:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 17:42:46,206 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 17:42:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 17:42:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 17:42:46,207 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 17:42:46,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 17:42:46,361 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 17:42:46,362 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 05:42:46 BoogieIcfgContainer [2021-03-24 17:42:46,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 17:42:46,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 17:42:46,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 17:42:46,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 17:42:46,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 05:42:46" (1/2) ... [2021-03-24 17:42:46,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c067098 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 05:42:46, skipping insertion in model container [2021-03-24 17:42:46,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 05:42:46" (2/2) ... [2021-03-24 17:42:46,368 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-03-24 17:42:46,372 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 17:42:46,375 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 17:42:46,375 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 17:42:46,402 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-24 17:42:46,417 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 17:42:46,433 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 17:42:46,434 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 17:42:46,434 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 17:42:46,434 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 17:42:46,434 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 17:42:46,434 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 17:42:46,434 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 17:42:46,434 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 17:42:46,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 86 flow [2021-03-24 17:42:46,465 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-03-24 17:42:46,465 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 17:42:46,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 0/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 17:42:46,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 86 flow [2021-03-24 17:42:46,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 74 flow [2021-03-24 17:42:46,471 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 17:42:46,479 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 31 transitions, 74 flow [2021-03-24 17:42:46,481 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 31 transitions, 74 flow [2021-03-24 17:42:46,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 74 flow [2021-03-24 17:42:46,495 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-24 17:42:46,511 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 17:42:46,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 0/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 17:42:46,514 INFO L142 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-24 17:42:46,672 INFO L154 LiptonReduction]: Checked pairs total: 1036 [2021-03-24 17:42:46,672 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-24 17:42:46,674 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 204 [2021-03-24 17:42:46,689 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-24 17:42:46,689 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 17:42:46,690 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:46,690 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:46,691 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1128452291, now seen corresponding path program 1 times [2021-03-24 17:42:46,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:46,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166112712] [2021-03-24 17:42:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:46,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:46,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:46,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:46,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:46,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:46,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:46,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:46,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:46,951 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-24 17:42:46,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:46,981 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 17:42:46,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166112712] [2021-03-24 17:42:46,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:46,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 17:42:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455465510] [2021-03-24 17:42:46,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 17:42:46,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:47,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 17:42:47,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-24 17:42:47,011 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 41 [2021-03-24 17:42:47,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 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 17:42:47,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:47,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 41 [2021-03-24 17:42:47,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:47,175 INFO L129 PetriNetUnfolder]: 1/49 cut-off events. [2021-03-24 17:42:47,175 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-24 17:42:47,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 49 events. 1/49 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 0 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-03-24 17:42:47,178 INFO L132 encePairwiseOnDemand]: 35/41 looper letters, 7 selfloop transitions, 7 changer transitions 2/35 dead transitions. [2021-03-24 17:42:47,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 114 flow [2021-03-24 17:42:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 17:42:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 17:42:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 265 transitions. [2021-03-24 17:42:47,195 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8079268292682927 [2021-03-24 17:42:47,196 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 265 transitions. [2021-03-24 17:42:47,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 265 transitions. [2021-03-24 17:42:47,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:47,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 265 transitions. [2021-03-24 17:42:47,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 33.125) internal successors, (265), 8 states have internal predecessors, (265), 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 17:42:47,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:47,221 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:47,223 INFO L185 Difference]: Start difference. First operand has 32 places, 25 transitions, 62 flow. Second operand 8 states and 265 transitions. [2021-03-24 17:42:47,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 114 flow [2021-03-24 17:42:47,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 17:42:47,231 INFO L241 Difference]: Finished difference. Result has 38 places, 30 transitions, 92 flow [2021-03-24 17:42:47,233 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2021-03-24 17:42:47,233 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2021-03-24 17:42:47,234 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 92 flow [2021-03-24 17:42:47,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 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 17:42:47,234 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:47,234 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:47,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 17:42:47,235 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:47,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1588229989, now seen corresponding path program 2 times [2021-03-24 17:42:47,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:47,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94079982] [2021-03-24 17:42:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:47,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,373 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-24 17:42:47,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,383 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 17:42:47,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94079982] [2021-03-24 17:42:47,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:47,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 17:42:47,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14865155] [2021-03-24 17:42:47,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 17:42:47,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:47,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 17:42:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-24 17:42:47,387 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 41 [2021-03-24 17:42:47,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 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 17:42:47,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:47,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 41 [2021-03-24 17:42:47,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:47,489 INFO L129 PetriNetUnfolder]: 1/43 cut-off events. [2021-03-24 17:42:47,489 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-24 17:42:47,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 43 events. 1/43 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 73. Up to 5 conditions per place. [2021-03-24 17:42:47,490 INFO L132 encePairwiseOnDemand]: 35/41 looper letters, 4 selfloop transitions, 6 changer transitions 4/33 dead transitions. [2021-03-24 17:42:47,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 134 flow [2021-03-24 17:42:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 17:42:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 17:42:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 262 transitions. [2021-03-24 17:42:47,497 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2021-03-24 17:42:47,497 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 262 transitions. [2021-03-24 17:42:47,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 262 transitions. [2021-03-24 17:42:47,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:47,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 262 transitions. [2021-03-24 17:42:47,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 32.75) internal successors, (262), 8 states have internal predecessors, (262), 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 17:42:47,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:47,507 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:47,507 INFO L185 Difference]: Start difference. First operand has 38 places, 30 transitions, 92 flow. Second operand 8 states and 262 transitions. [2021-03-24 17:42:47,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 134 flow [2021-03-24 17:42:47,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 130 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-24 17:42:47,511 INFO L241 Difference]: Finished difference. Result has 43 places, 27 transitions, 91 flow [2021-03-24 17:42:47,511 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=91, PETRI_PLACES=43, PETRI_TRANSITIONS=27} [2021-03-24 17:42:47,511 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2021-03-24 17:42:47,511 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 27 transitions, 91 flow [2021-03-24 17:42:47,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 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 17:42:47,512 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:47,512 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:47,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 17:42:47,512 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash 951639229, now seen corresponding path program 3 times [2021-03-24 17:42:47,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:47,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259061772] [2021-03-24 17:42:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:47,532 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,532 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:47,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 17:42:47,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 17:42:47,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 17:42:47,545 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 17:42:47,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:47,563 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 17:42:47,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259061772] [2021-03-24 17:42:47,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:47,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 17:42:47,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661229559] [2021-03-24 17:42:47,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 17:42:47,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 17:42:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-24 17:42:47,567 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:47,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 27 transitions, 91 flow. Second operand has 7 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 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 17:42:47,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:47,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:47,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:47,699 INFO L129 PetriNetUnfolder]: 17/122 cut-off events. [2021-03-24 17:42:47,700 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2021-03-24 17:42:47,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 122 events. 17/122 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 500 event pairs, 3 based on Foata normal form. 2/123 useless extension candidates. Maximal degree in co-relation 228. Up to 14 conditions per place. [2021-03-24 17:42:47,702 INFO L132 encePairwiseOnDemand]: 32/41 looper letters, 14 selfloop transitions, 13 changer transitions 4/49 dead transitions. [2021-03-24 17:42:47,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 197 flow [2021-03-24 17:42:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 17:42:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 17:42:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2021-03-24 17:42:47,704 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7452574525745257 [2021-03-24 17:42:47,704 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 275 transitions. [2021-03-24 17:42:47,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 275 transitions. [2021-03-24 17:42:47,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:47,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 275 transitions. [2021-03-24 17:42:47,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 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 17:42:47,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:47,708 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:47,708 INFO L185 Difference]: Start difference. First operand has 43 places, 27 transitions, 91 flow. Second operand 9 states and 275 transitions. [2021-03-24 17:42:47,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 197 flow [2021-03-24 17:42:47,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 174 flow, removed 2 selfloop flow, removed 10 redundant places. [2021-03-24 17:42:47,713 INFO L241 Difference]: Finished difference. Result has 43 places, 39 transitions, 150 flow [2021-03-24 17:42:47,713 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=150, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2021-03-24 17:42:47,713 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2021-03-24 17:42:47,713 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 150 flow [2021-03-24 17:42:47,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 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 17:42:47,714 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:47,714 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:47,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 17:42:47,714 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:47,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2016059739, now seen corresponding path program 4 times [2021-03-24 17:42:47,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:47,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327338568] [2021-03-24 17:42:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:47,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:47,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:47,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:47,746 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 17:42:47,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327338568] [2021-03-24 17:42:47,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:47,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 17:42:47,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240267566] [2021-03-24 17:42:47,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 17:42:47,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:47,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 17:42:47,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 17:42:47,748 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 41 [2021-03-24 17:42:47,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 17:42:47,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:47,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 41 [2021-03-24 17:42:47,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:47,766 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2021-03-24 17:42:47,766 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-24 17:42:47,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 75 events. 3/75 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 248 event pairs, 0 based on Foata normal form. 3/77 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2021-03-24 17:42:47,767 INFO L132 encePairwiseOnDemand]: 38/41 looper letters, 2 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2021-03-24 17:42:47,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 143 flow [2021-03-24 17:42:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 17:42:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 17:42:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2021-03-24 17:42:47,768 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8943089430894309 [2021-03-24 17:42:47,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2021-03-24 17:42:47,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2021-03-24 17:42:47,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:47,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2021-03-24 17:42:47,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 17:42:47,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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 17:42:47,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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 17:42:47,770 INFO L185 Difference]: Start difference. First operand has 43 places, 39 transitions, 150 flow. Second operand 3 states and 110 transitions. [2021-03-24 17:42:47,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 143 flow [2021-03-24 17:42:47,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 139 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-24 17:42:47,777 INFO L241 Difference]: Finished difference. Result has 43 places, 36 transitions, 139 flow [2021-03-24 17:42:47,777 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2021-03-24 17:42:47,777 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2021-03-24 17:42:47,778 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 139 flow [2021-03-24 17:42:47,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 17:42:47,778 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:47,778 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:47,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 17:42:47,778 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:47,779 INFO L82 PathProgramCache]: Analyzing trace with hash -870352115, now seen corresponding path program 5 times [2021-03-24 17:42:47,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:47,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704276985] [2021-03-24 17:42:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:47,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:47,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:47,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:47,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:47,871 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 17:42:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704276985] [2021-03-24 17:42:47,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:47,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 17:42:47,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118953056] [2021-03-24 17:42:47,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 17:42:47,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 17:42:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-24 17:42:47,874 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:47,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 139 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:47,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:47,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:47,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:48,020 INFO L129 PetriNetUnfolder]: 21/167 cut-off events. [2021-03-24 17:42:48,020 INFO L130 PetriNetUnfolder]: For 84/88 co-relation queries the response was YES. [2021-03-24 17:42:48,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 167 events. 21/167 cut-off events. For 84/88 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 805 event pairs, 0 based on Foata normal form. 1/167 useless extension candidates. Maximal degree in co-relation 151. Up to 23 conditions per place. [2021-03-24 17:42:48,022 INFO L132 encePairwiseOnDemand]: 32/41 looper letters, 21 selfloop transitions, 17 changer transitions 2/58 dead transitions. [2021-03-24 17:42:48,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 315 flow [2021-03-24 17:42:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 17:42:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 17:42:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2021-03-24 17:42:48,023 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7425474254742548 [2021-03-24 17:42:48,023 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 274 transitions. [2021-03-24 17:42:48,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 274 transitions. [2021-03-24 17:42:48,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:48,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 274 transitions. [2021-03-24 17:42:48,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.444444444444443) internal successors, (274), 9 states have internal predecessors, (274), 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 17:42:48,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,025 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,025 INFO L185 Difference]: Start difference. First operand has 43 places, 36 transitions, 139 flow. Second operand 9 states and 274 transitions. [2021-03-24 17:42:48,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 315 flow [2021-03-24 17:42:48,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 17:42:48,028 INFO L241 Difference]: Finished difference. Result has 54 places, 46 transitions, 254 flow [2021-03-24 17:42:48,028 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=254, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2021-03-24 17:42:48,028 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2021-03-24 17:42:48,028 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 254 flow [2021-03-24 17:42:48,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,029 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:48,029 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:48,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 17:42:48,029 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:48,029 INFO L82 PathProgramCache]: Analyzing trace with hash 764224061, now seen corresponding path program 6 times [2021-03-24 17:42:48,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:48,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606299644] [2021-03-24 17:42:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:48,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,070 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,088 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,114 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,125 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 17:42:48,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606299644] [2021-03-24 17:42:48,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:48,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 17:42:48,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126248602] [2021-03-24 17:42:48,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 17:42:48,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:48,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 17:42:48,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-24 17:42:48,128 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:48,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 254 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:48,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:48,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:48,311 INFO L129 PetriNetUnfolder]: 24/176 cut-off events. [2021-03-24 17:42:48,312 INFO L130 PetriNetUnfolder]: For 279/283 co-relation queries the response was YES. [2021-03-24 17:42:48,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 176 events. 24/176 cut-off events. For 279/283 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 894 event pairs, 7 based on Foata normal form. 3/174 useless extension candidates. Maximal degree in co-relation 226. Up to 25 conditions per place. [2021-03-24 17:42:48,313 INFO L132 encePairwiseOnDemand]: 32/41 looper letters, 23 selfloop transitions, 17 changer transitions 0/58 dead transitions. [2021-03-24 17:42:48,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 408 flow [2021-03-24 17:42:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 17:42:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 17:42:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 276 transitions. [2021-03-24 17:42:48,315 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7479674796747967 [2021-03-24 17:42:48,315 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 276 transitions. [2021-03-24 17:42:48,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 276 transitions. [2021-03-24 17:42:48,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:48,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 276 transitions. [2021-03-24 17:42:48,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.666666666666668) internal successors, (276), 9 states have internal predecessors, (276), 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 17:42:48,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,317 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,317 INFO L185 Difference]: Start difference. First operand has 54 places, 46 transitions, 254 flow. Second operand 9 states and 276 transitions. [2021-03-24 17:42:48,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 408 flow [2021-03-24 17:42:48,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 398 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 17:42:48,320 INFO L241 Difference]: Finished difference. Result has 62 places, 52 transitions, 338 flow [2021-03-24 17:42:48,321 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2021-03-24 17:42:48,321 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 30 predicate places. [2021-03-24 17:42:48,321 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 338 flow [2021-03-24 17:42:48,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,321 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:48,321 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:48,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 17:42:48,322 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2035215915, now seen corresponding path program 7 times [2021-03-24 17:42:48,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:48,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625001331] [2021-03-24 17:42:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:48,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,335 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 17:42:48,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625001331] [2021-03-24 17:42:48,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:48,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 17:42:48,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069041017] [2021-03-24 17:42:48,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 17:42:48,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:48,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 17:42:48,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 17:42:48,336 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 41 [2021-03-24 17:42:48,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 338 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 17:42:48,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:48,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 41 [2021-03-24 17:42:48,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:48,350 INFO L129 PetriNetUnfolder]: 13/143 cut-off events. [2021-03-24 17:42:48,351 INFO L130 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2021-03-24 17:42:48,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 143 events. 13/143 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 702 event pairs, 1 based on Foata normal form. 5/148 useless extension candidates. Maximal degree in co-relation 257. Up to 18 conditions per place. [2021-03-24 17:42:48,352 INFO L132 encePairwiseOnDemand]: 38/41 looper letters, 2 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2021-03-24 17:42:48,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 51 transitions, 335 flow [2021-03-24 17:42:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 17:42:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 17:42:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-03-24 17:42:48,353 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8699186991869918 [2021-03-24 17:42:48,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-03-24 17:42:48,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-03-24 17:42:48,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:48,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-03-24 17:42:48,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 17:42:48,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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 17:42:48,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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 17:42:48,354 INFO L185 Difference]: Start difference. First operand has 62 places, 52 transitions, 338 flow. Second operand 3 states and 107 transitions. [2021-03-24 17:42:48,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 51 transitions, 335 flow [2021-03-24 17:42:48,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 311 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-03-24 17:42:48,357 INFO L241 Difference]: Finished difference. Result has 62 places, 51 transitions, 311 flow [2021-03-24 17:42:48,357 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2021-03-24 17:42:48,357 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 30 predicate places. [2021-03-24 17:42:48,357 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 311 flow [2021-03-24 17:42:48,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 17:42:48,358 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:48,358 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:48,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 17:42:48,358 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1677413295, now seen corresponding path program 8 times [2021-03-24 17:42:48,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:48,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114726634] [2021-03-24 17:42:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:48,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,384 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,411 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 17:42:48,430 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,431 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 17:42:48,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114726634] [2021-03-24 17:42:48,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:48,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 17:42:48,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940551621] [2021-03-24 17:42:48,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 17:42:48,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:48,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 17:42:48,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-24 17:42:48,433 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:48,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:48,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:48,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:48,564 INFO L129 PetriNetUnfolder]: 19/162 cut-off events. [2021-03-24 17:42:48,565 INFO L130 PetriNetUnfolder]: For 288/288 co-relation queries the response was YES. [2021-03-24 17:42:48,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 162 events. 19/162 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 795 event pairs, 6 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 355. Up to 23 conditions per place. [2021-03-24 17:42:48,566 INFO L132 encePairwiseOnDemand]: 32/41 looper letters, 22 selfloop transitions, 17 changer transitions 0/57 dead transitions. [2021-03-24 17:42:48,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 430 flow [2021-03-24 17:42:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 17:42:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 17:42:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2021-03-24 17:42:48,567 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7452574525745257 [2021-03-24 17:42:48,567 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 275 transitions. [2021-03-24 17:42:48,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 275 transitions. [2021-03-24 17:42:48,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:48,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 275 transitions. [2021-03-24 17:42:48,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 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 17:42:48,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,569 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,569 INFO L185 Difference]: Start difference. First operand has 62 places, 51 transitions, 311 flow. Second operand 9 states and 275 transitions. [2021-03-24 17:42:48,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 430 flow [2021-03-24 17:42:48,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 17:42:48,572 INFO L241 Difference]: Finished difference. Result has 71 places, 55 transitions, 391 flow [2021-03-24 17:42:48,572 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=391, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2021-03-24 17:42:48,573 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2021-03-24 17:42:48,573 INFO L480 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 391 flow [2021-03-24 17:42:48,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,573 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:48,573 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:48,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 17:42:48,573 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1603753741, now seen corresponding path program 9 times [2021-03-24 17:42:48,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:48,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386534764] [2021-03-24 17:42:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:48,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,611 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,619 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-24 17:42:48,620 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 17:42:48,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,629 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 17:42:48,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386534764] [2021-03-24 17:42:48,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:48,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 17:42:48,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047534394] [2021-03-24 17:42:48,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 17:42:48,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:48,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 17:42:48,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-24 17:42:48,630 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:48,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:48,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:48,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:48,754 INFO L129 PetriNetUnfolder]: 15/152 cut-off events. [2021-03-24 17:42:48,754 INFO L130 PetriNetUnfolder]: For 353/357 co-relation queries the response was YES. [2021-03-24 17:42:48,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 152 events. 15/152 cut-off events. For 353/357 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 743 event pairs, 6 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 415. Up to 23 conditions per place. [2021-03-24 17:42:48,755 INFO L132 encePairwiseOnDemand]: 33/41 looper letters, 21 selfloop transitions, 12 changer transitions 4/55 dead transitions. [2021-03-24 17:42:48,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 55 transitions, 453 flow [2021-03-24 17:42:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 17:42:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 17:42:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2021-03-24 17:42:48,756 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7398373983739838 [2021-03-24 17:42:48,756 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 273 transitions. [2021-03-24 17:42:48,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 273 transitions. [2021-03-24 17:42:48,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:48,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 273 transitions. [2021-03-24 17:42:48,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 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 17:42:48,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,758 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,758 INFO L185 Difference]: Start difference. First operand has 71 places, 55 transitions, 391 flow. Second operand 9 states and 273 transitions. [2021-03-24 17:42:48,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 55 transitions, 453 flow [2021-03-24 17:42:48,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 55 transitions, 428 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-03-24 17:42:48,762 INFO L241 Difference]: Finished difference. Result has 75 places, 49 transitions, 324 flow [2021-03-24 17:42:48,762 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=324, PETRI_PLACES=75, PETRI_TRANSITIONS=49} [2021-03-24 17:42:48,762 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2021-03-24 17:42:48,762 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 49 transitions, 324 flow [2021-03-24 17:42:48,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,762 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:48,762 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:48,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 17:42:48,763 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1151885551, now seen corresponding path program 10 times [2021-03-24 17:42:48,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:48,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567207715] [2021-03-24 17:42:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:48,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,778 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,793 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,807 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-24 17:42:48,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,815 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,816 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 17:42:48,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567207715] [2021-03-24 17:42:48,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:48,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 17:42:48,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028111798] [2021-03-24 17:42:48,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 17:42:48,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:48,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 17:42:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-24 17:42:48,818 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:48,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 49 transitions, 324 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:48,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:48,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:48,920 INFO L129 PetriNetUnfolder]: 13/120 cut-off events. [2021-03-24 17:42:48,920 INFO L130 PetriNetUnfolder]: For 260/260 co-relation queries the response was YES. [2021-03-24 17:42:48,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 120 events. 13/120 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 497 event pairs, 6 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 369. Up to 23 conditions per place. [2021-03-24 17:42:48,921 INFO L132 encePairwiseOnDemand]: 34/41 looper letters, 16 selfloop transitions, 7 changer transitions 6/47 dead transitions. [2021-03-24 17:42:48,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 47 transitions, 356 flow [2021-03-24 17:42:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 17:42:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 17:42:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2021-03-24 17:42:48,923 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2021-03-24 17:42:48,923 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 267 transitions. [2021-03-24 17:42:48,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 267 transitions. [2021-03-24 17:42:48,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:48,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 267 transitions. [2021-03-24 17:42:48,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 29.666666666666668) internal successors, (267), 9 states have internal predecessors, (267), 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 17:42:48,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,924 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:48,925 INFO L185 Difference]: Start difference. First operand has 75 places, 49 transitions, 324 flow. Second operand 9 states and 267 transitions. [2021-03-24 17:42:48,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 47 transitions, 356 flow [2021-03-24 17:42:48,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 47 transitions, 328 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-03-24 17:42:48,927 INFO L241 Difference]: Finished difference. Result has 71 places, 39 transitions, 218 flow [2021-03-24 17:42:48,928 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=218, PETRI_PLACES=71, PETRI_TRANSITIONS=39} [2021-03-24 17:42:48,928 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2021-03-24 17:42:48,928 INFO L480 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 218 flow [2021-03-24 17:42:48,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:48,928 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:48,929 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:48,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 17:42:48,929 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash 24646747, now seen corresponding path program 11 times [2021-03-24 17:42:48,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:48,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302849080] [2021-03-24 17:42:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:48,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,950 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:48,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:48,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:48,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 17:42:49,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:49,004 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 17:42:49,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302849080] [2021-03-24 17:42:49,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:49,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 17:42:49,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670914798] [2021-03-24 17:42:49,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 17:42:49,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 17:42:49,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-24 17:42:49,006 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:49,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 39 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:49,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:49,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:49,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:49,097 INFO L129 PetriNetUnfolder]: 12/107 cut-off events. [2021-03-24 17:42:49,097 INFO L130 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2021-03-24 17:42:49,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 107 events. 12/107 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 407 event pairs, 3 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 308. Up to 30 conditions per place. [2021-03-24 17:42:49,098 INFO L132 encePairwiseOnDemand]: 32/41 looper letters, 13 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2021-03-24 17:42:49,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 43 transitions, 293 flow [2021-03-24 17:42:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 17:42:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 17:42:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2021-03-24 17:42:49,099 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7225609756097561 [2021-03-24 17:42:49,099 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 237 transitions. [2021-03-24 17:42:49,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 237 transitions. [2021-03-24 17:42:49,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:49,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 237 transitions. [2021-03-24 17:42:49,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 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 17:42:49,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:49,102 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:49,102 INFO L185 Difference]: Start difference. First operand has 71 places, 39 transitions, 218 flow. Second operand 8 states and 237 transitions. [2021-03-24 17:42:49,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 43 transitions, 293 flow [2021-03-24 17:42:49,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 43 transitions, 243 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-03-24 17:42:49,104 INFO L241 Difference]: Finished difference. Result has 59 places, 41 transitions, 220 flow [2021-03-24 17:42:49,104 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=220, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2021-03-24 17:42:49,104 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2021-03-24 17:42:49,105 INFO L480 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 220 flow [2021-03-24 17:42:49,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:49,105 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:49,105 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:49,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 17:42:49,105 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:49,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1234686595, now seen corresponding path program 12 times [2021-03-24 17:42:49,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:49,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297579631] [2021-03-24 17:42:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:49,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,127 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:49,127 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 17:42:49,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 17:42:49,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,133 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 17:42:49,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 17:42:49,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:49,152 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 17:42:49,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297579631] [2021-03-24 17:42:49,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:49,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 17:42:49,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140974031] [2021-03-24 17:42:49,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 17:42:49,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:49,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 17:42:49,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-24 17:42:49,157 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:49,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 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 17:42:49,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:49,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:49,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:49,216 INFO L129 PetriNetUnfolder]: 9/81 cut-off events. [2021-03-24 17:42:49,216 INFO L130 PetriNetUnfolder]: For 128/133 co-relation queries the response was YES. [2021-03-24 17:42:49,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 81 events. 9/81 cut-off events. For 128/133 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 248 event pairs, 1 based on Foata normal form. 5/86 useless extension candidates. Maximal degree in co-relation 245. Up to 13 conditions per place. [2021-03-24 17:42:49,217 INFO L132 encePairwiseOnDemand]: 33/41 looper letters, 6 selfloop transitions, 11 changer transitions 7/42 dead transitions. [2021-03-24 17:42:49,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 42 transitions, 283 flow [2021-03-24 17:42:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 17:42:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 17:42:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2021-03-24 17:42:49,218 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7100271002710027 [2021-03-24 17:42:49,218 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 262 transitions. [2021-03-24 17:42:49,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 262 transitions. [2021-03-24 17:42:49,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:49,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 262 transitions. [2021-03-24 17:42:49,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 29.11111111111111) internal successors, (262), 9 states have internal predecessors, (262), 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 17:42:49,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:49,220 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 17:42:49,220 INFO L185 Difference]: Start difference. First operand has 59 places, 41 transitions, 220 flow. Second operand 9 states and 262 transitions. [2021-03-24 17:42:49,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 42 transitions, 283 flow [2021-03-24 17:42:49,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 42 transitions, 260 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-24 17:42:49,222 INFO L241 Difference]: Finished difference. Result has 62 places, 35 transitions, 192 flow [2021-03-24 17:42:49,222 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=192, PETRI_PLACES=62, PETRI_TRANSITIONS=35} [2021-03-24 17:42:49,222 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 30 predicate places. [2021-03-24 17:42:49,223 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 35 transitions, 192 flow [2021-03-24 17:42:49,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 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 17:42:49,223 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:49,223 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:49,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 17:42:49,223 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -648108935, now seen corresponding path program 13 times [2021-03-24 17:42:49,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:49,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709954410] [2021-03-24 17:42:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:49,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:49,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,269 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-24 17:42:49,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 17:42:49,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:49,278 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 17:42:49,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709954410] [2021-03-24 17:42:49,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:49,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 17:42:49,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428272644] [2021-03-24 17:42:49,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 17:42:49,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 17:42:49,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-24 17:42:49,280 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:49,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 35 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:49,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:49,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:49,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:49,360 INFO L129 PetriNetUnfolder]: 2/50 cut-off events. [2021-03-24 17:42:49,360 INFO L130 PetriNetUnfolder]: For 77/79 co-relation queries the response was YES. [2021-03-24 17:42:49,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 50 events. 2/50 cut-off events. For 77/79 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2021-03-24 17:42:49,360 INFO L132 encePairwiseOnDemand]: 33/41 looper letters, 5 selfloop transitions, 6 changer transitions 4/33 dead transitions. [2021-03-24 17:42:49,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 33 transitions, 205 flow [2021-03-24 17:42:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 17:42:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 17:42:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2021-03-24 17:42:49,361 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2021-03-24 17:42:49,362 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 230 transitions. [2021-03-24 17:42:49,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 230 transitions. [2021-03-24 17:42:49,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:49,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 230 transitions. [2021-03-24 17:42:49,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 28.75) internal successors, (230), 8 states have internal predecessors, (230), 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 17:42:49,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:49,363 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:49,363 INFO L185 Difference]: Start difference. First operand has 62 places, 35 transitions, 192 flow. Second operand 8 states and 230 transitions. [2021-03-24 17:42:49,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 33 transitions, 205 flow [2021-03-24 17:42:49,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 33 transitions, 170 flow, removed 1 selfloop flow, removed 10 redundant places. [2021-03-24 17:42:49,365 INFO L241 Difference]: Finished difference. Result has 57 places, 29 transitions, 128 flow [2021-03-24 17:42:49,365 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=128, PETRI_PLACES=57, PETRI_TRANSITIONS=29} [2021-03-24 17:42:49,365 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2021-03-24 17:42:49,365 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 29 transitions, 128 flow [2021-03-24 17:42:49,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:49,365 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 17:42:49,365 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 17:42:49,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-24 17:42:49,366 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 17:42:49,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 17:42:49,366 INFO L82 PathProgramCache]: Analyzing trace with hash 652109069, now seen corresponding path program 14 times [2021-03-24 17:42:49,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 17:42:49,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805762684] [2021-03-24 17:42:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 17:42:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 17:42:49,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:49,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,411 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-24 17:42:49,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 17:42:49,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 17:42:49,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 17:42:49,423 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 17:42:49,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805762684] [2021-03-24 17:42:49,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 17:42:49,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 17:42:49,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430380437] [2021-03-24 17:42:49,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 17:42:49,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 17:42:49,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 17:42:49,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-24 17:42:49,424 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-24 17:42:49,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 29 transitions, 128 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:49,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 17:42:49,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-24 17:42:49,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 17:42:49,503 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-24 17:42:49,503 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-03-24 17:42:49,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 18 events. 0/18 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 1/19 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 17:42:49,503 INFO L132 encePairwiseOnDemand]: 34/41 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2021-03-24 17:42:49,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 18 transitions, 91 flow [2021-03-24 17:42:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 17:42:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 17:42:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2021-03-24 17:42:49,504 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2021-03-24 17:42:49,504 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 224 transitions. [2021-03-24 17:42:49,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 224 transitions. [2021-03-24 17:42:49,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 17:42:49,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 224 transitions. [2021-03-24 17:42:49,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 17:42:49,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:49,506 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 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 17:42:49,506 INFO L185 Difference]: Start difference. First operand has 57 places, 29 transitions, 128 flow. Second operand 8 states and 224 transitions. [2021-03-24 17:42:49,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 18 transitions, 91 flow [2021-03-24 17:42:49,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 18 transitions, 68 flow, removed 1 selfloop flow, removed 12 redundant places. [2021-03-24 17:42:49,506 INFO L241 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2021-03-24 17:42:49,507 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2021-03-24 17:42:49,507 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2021-03-24 17:42:49,507 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2021-03-24 17:42:49,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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 17:42:49,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-24 17:42:49,510 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 05:42:49 BasicIcfg [2021-03-24 17:42:49,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 17:42:49,511 INFO L168 Benchmark]: Toolchain (without parser) took 3421.82 ms. Allocated memory was 255.9 MB in the beginning and 337.6 MB in the end (delta: 81.8 MB). Free memory was 236.5 MB in the beginning and 266.3 MB in the end (delta: -29.8 MB). Peak memory consumption was 52.5 MB. Max. memory is 16.0 GB. [2021-03-24 17:42:49,511 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 17:42:49,512 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.66 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 17:42:49,512 INFO L168 Benchmark]: Boogie Preprocessor took 11.47 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 924.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 17:42:49,512 INFO L168 Benchmark]: RCFGBuilder took 233.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 239.5 MB in the end (delta: -5.5 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-03-24 17:42:49,512 INFO L168 Benchmark]: TraceAbstraction took 3147.30 ms. Allocated memory was 255.9 MB in the beginning and 337.6 MB in the end (delta: 81.8 MB). Free memory was 239.0 MB in the beginning and 266.3 MB in the end (delta: -27.2 MB). Peak memory consumption was 53.9 MB. Max. memory is 16.0 GB. [2021-03-24 17:42:49,513 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 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.66 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.47 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 924.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 233.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 239.5 MB in the end (delta: -5.5 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3147.30 ms. Allocated memory was 255.9 MB in the beginning and 337.6 MB in the end (delta: 81.8 MB). Free memory was 239.0 MB in the beginning and 266.3 MB in the end (delta: -27.2 MB). Peak memory consumption was 53.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 190.8ms, 38 PlacesBefore, 32 PlacesAfterwards, 31 TransitionsBefore, 25 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 3 FixpointIterations, 4 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 1036 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 514, positive: 416, positive conditional: 0, positive unconditional: 416, negative: 98, negative conditional: 0, negative unconditional: 98, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 101, positive: 85, positive conditional: 0, positive unconditional: 85, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 101, positive: 85, positive conditional: 0, positive unconditional: 85, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 514, positive: 331, positive conditional: 0, positive unconditional: 331, negative: 82, negative conditional: 0, negative unconditional: 82, unknown: 101, unknown conditional: 0, unknown unconditional: 101] , Statistics on independence cache: Total cache size (in pairs): 73, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - PositiveResult [Line: 60]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3077.7ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1626.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 247.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 77 SDtfs, 253 SDslu, 85 SDs, 0 SdLazy, 559 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 348.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1124.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=391occurred in iteration=8, InterpolantAutomatonStates: 109, 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: 32.2ms SsaConstructionTime, 104.6ms SatisfiabilityAnalysisTime, 896.5ms InterpolantComputationTime, 350 NumberOfCodeBlocks, 350 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 336 ConstructedInterpolants, 0 QuantifiedInterpolants, 1442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...