/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/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:39:19,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:39:19,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:39:19,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:39:19,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:39:19,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:39:19,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:39:19,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:39:19,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:39:19,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:39:19,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:39:19,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:39:19,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:39:19,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:39:19,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:39:19,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:39:19,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:39:19,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:39:19,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:39:19,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:39:19,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:39:19,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:39:19,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:39:19,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:39:19,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 13:39:19,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:39:19,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:39:19,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:39:19,199 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 13:39:19,222 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:39:19,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:39:19,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:39:19,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:39:19,226 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:39:19,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:39:19,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:39:19,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:39:19,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:39:19,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:39:19,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:39:19,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:39:19,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:39:19,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:39:19,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:39:19,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:39:19,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:39:19,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:39:19,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:39:19,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:39:19,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:39:19,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:39:19,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:39:19,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:39:19,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:39:19,482 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 13:39:19,482 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 13:39:19,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-03-24 13:39:19,483 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-03-24 13:39:19,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:39:19,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 13:39:19,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:39:19,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:39:19,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:39:19,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:39:19,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:39:19,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:39:19,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:39:19,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/1) ... [2021-03-24 13:39:19,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:39:19,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:39:19,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:39:19,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:39:19,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (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 13:39:19,587 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-03-24 13:39:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-03-24 13:39:19,588 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-03-24 13:39:19,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-03-24 13:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-03-24 13:39:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-03-24 13:39:19,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-03-24 13:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-03-24 13:39:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-03-24 13:39:19,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-03-24 13:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-03-24 13:39:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-03-24 13:39:19,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 13:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:39:19,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:39:19,590 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 13:39:19,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:39:19,678 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 13:39:19,679 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:39:19 BoogieIcfgContainer [2021-03-24 13:39:19,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:39:19,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:39:19,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:39:19,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:39:19,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:39:19" (1/2) ... [2021-03-24 13:39:19,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8abbb18 and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:39:19, skipping insertion in model container [2021-03-24 13:39:19,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:39:19" (2/2) ... [2021-03-24 13:39:19,683 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-03-24 13:39:19,686 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:39:19,688 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:39:19,689 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:39:19,739 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-03-24 13:39:19,750 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-24 13:39:19,762 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:39:19,762 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:39:19,763 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:39:19,763 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:39:19,763 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:39:19,763 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:39:19,763 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:39:19,763 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:39:19,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions, 138 flow [2021-03-24 13:39:19,807 INFO L129 PetriNetUnfolder]: 17/47 cut-off events. [2021-03-24 13:39:19,807 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 13:39:19,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 47 events. 17/47 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 122 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2021-03-24 13:39:19,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 35 transitions, 138 flow [2021-03-24 13:39:19,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 118 flow [2021-03-24 13:39:19,813 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:39:19,819 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 29 transitions, 118 flow [2021-03-24 13:39:19,833 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 29 transitions, 118 flow [2021-03-24 13:39:19,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 118 flow [2021-03-24 13:39:19,861 INFO L129 PetriNetUnfolder]: 17/45 cut-off events. [2021-03-24 13:39:19,861 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 13:39:19,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 45 events. 17/45 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 108 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2021-03-24 13:39:19,864 INFO L142 LiptonReduction]: Number of co-enabled transitions 216 [2021-03-24 13:39:19,897 INFO L154 LiptonReduction]: Checked pairs total: 66 [2021-03-24 13:39:19,897 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 13:39:19,899 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 86 [2021-03-24 13:39:19,908 INFO L129 PetriNetUnfolder]: 17/40 cut-off events. [2021-03-24 13:39:19,908 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 13:39:19,908 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:19,909 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:19,909 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1888322031, now seen corresponding path program 1 times [2021-03-24 13:39:19,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:19,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733034060] [2021-03-24 13:39:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:19,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:19,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:19,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:19,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:39:19,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:19,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:19,997 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 13:39:19,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733034060] [2021-03-24 13:39:19,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:19,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:39:19,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040130237] [2021-03-24 13:39:20,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:39:20,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:39:20,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:39:20,012 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-03-24 13:39:20,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 13:39:20,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-03-24 13:39:20,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:20,027 INFO L129 PetriNetUnfolder]: 14/37 cut-off events. [2021-03-24 13:39:20,027 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-03-24 13:39:20,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 37 events. 14/37 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 35. Up to 12 conditions per place. [2021-03-24 13:39:20,028 INFO L132 encePairwiseOnDemand]: 37/39 looper letters, 3 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2021-03-24 13:39:20,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 113 flow [2021-03-24 13:39:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:39:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:39:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-03-24 13:39:20,035 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-03-24 13:39:20,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:20,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,038 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 13:39:20,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 13:39:20,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 13:39:20,042 INFO L185 Difference]: Start difference. First operand has 26 places, 25 transitions, 110 flow. Second operand 3 states and 107 transitions. [2021-03-24 13:39:20,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 113 flow [2021-03-24 13:39:20,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 75 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-24 13:39:20,050 INFO L241 Difference]: Finished difference. Result has 20 places, 24 transitions, 69 flow [2021-03-24 13:39:20,051 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=20, PETRI_TRANSITIONS=24} [2021-03-24 13:39:20,052 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2021-03-24 13:39:20,052 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 24 transitions, 69 flow [2021-03-24 13:39:20,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 13:39:20,052 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:20,052 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:20,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:39:20,052 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:20,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash -153583415, now seen corresponding path program 1 times [2021-03-24 13:39:20,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:20,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659220871] [2021-03-24 13:39:20,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:20,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,078 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:39:20,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,085 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 13:39:20,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659220871] [2021-03-24 13:39:20,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:20,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:39:20,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21644656] [2021-03-24 13:39:20,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:39:20,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:39:20,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:39:20,092 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-03-24 13:39:20,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 24 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 13:39:20,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-03-24 13:39:20,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:20,109 INFO L129 PetriNetUnfolder]: 6/25 cut-off events. [2021-03-24 13:39:20,109 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-24 13:39:20,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 25 events. 6/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 3/28 useless extension candidates. Maximal degree in co-relation 30. Up to 6 conditions per place. [2021-03-24 13:39:20,110 INFO L132 encePairwiseOnDemand]: 36/39 looper letters, 2 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2021-03-24 13:39:20,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 69 flow [2021-03-24 13:39:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:39:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:39:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-03-24 13:39:20,113 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-03-24 13:39:20,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:20,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,114 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 13:39:20,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 13:39:20,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 13:39:20,115 INFO L185 Difference]: Start difference. First operand has 20 places, 24 transitions, 69 flow. Second operand 3 states and 107 transitions. [2021-03-24 13:39:20,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 69 flow [2021-03-24 13:39:20,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 68 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:39:20,116 INFO L241 Difference]: Finished difference. Result has 21 places, 22 transitions, 64 flow [2021-03-24 13:39:20,116 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=22} [2021-03-24 13:39:20,117 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2021-03-24 13:39:20,117 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 22 transitions, 64 flow [2021-03-24 13:39:20,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 13:39:20,117 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:20,117 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:20,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:39:20,117 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1587378979, now seen corresponding path program 1 times [2021-03-24 13:39:20,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:20,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195145828] [2021-03-24 13:39:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:20,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:39:20,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,142 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 13:39:20,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195145828] [2021-03-24 13:39:20,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:20,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:39:20,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102672893] [2021-03-24 13:39:20,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:39:20,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:39:20,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:39:20,145 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-03-24 13:39:20,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 13:39:20,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-03-24 13:39:20,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:20,164 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-24 13:39:20,164 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:39:20,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 0/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 3/16 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 13:39:20,164 INFO L132 encePairwiseOnDemand]: 35/39 looper letters, 1 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2021-03-24 13:39:20,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 41 flow [2021-03-24 13:39:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:39:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:39:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-03-24 13:39:20,169 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-03-24 13:39:20,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:20,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-03-24 13:39:20,170 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 13:39:20,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 13:39:20,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 13:39:20,171 INFO L185 Difference]: Start difference. First operand has 21 places, 22 transitions, 64 flow. Second operand 3 states and 107 transitions. [2021-03-24 13:39:20,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 41 flow [2021-03-24 13:39:20,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 13 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:39:20,172 INFO L241 Difference]: Finished difference. Result has 22 places, 13 transitions, 38 flow [2021-03-24 13:39:20,172 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=22, PETRI_TRANSITIONS=13} [2021-03-24 13:39:20,172 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2021-03-24 13:39:20,172 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 13 transitions, 38 flow [2021-03-24 13:39:20,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 13:39:20,172 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:20,172 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:20,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 13:39:20,172 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash -136113801, now seen corresponding path program 1 times [2021-03-24 13:39:20,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:20,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143638496] [2021-03-24 13:39:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:20,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:20,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:20,254 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:20,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:20,277 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:20,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:20,298 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 13:39:20,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143638496] [2021-03-24 13:39:20,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:20,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:20,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899772198] [2021-03-24 13:39:20,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:20,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:20,300 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:20,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 13 transitions, 38 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:20,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:20,364 INFO L129 PetriNetUnfolder]: 15/65 cut-off events. [2021-03-24 13:39:20,365 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:39:20,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 65 events. 15/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 249 event pairs, 5 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 107. Up to 17 conditions per place. [2021-03-24 13:39:20,367 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 9 selfloop transitions, 3 changer transitions 1/21 dead transitions. [2021-03-24 13:39:20,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 80 flow [2021-03-24 13:39:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:20,368 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:20,368 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:20,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:20,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,372 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,372 INFO L185 Difference]: Start difference. First operand has 22 places, 13 transitions, 38 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:20,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 80 flow [2021-03-24 13:39:20,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 21 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:39:20,374 INFO L241 Difference]: Finished difference. Result has 30 places, 15 transitions, 60 flow [2021-03-24 13:39:20,374 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=60, PETRI_PLACES=30, PETRI_TRANSITIONS=15} [2021-03-24 13:39:20,374 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2021-03-24 13:39:20,374 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 15 transitions, 60 flow [2021-03-24 13:39:20,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,376 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:20,377 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:20,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 13:39:20,377 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -816343229, now seen corresponding path program 2 times [2021-03-24 13:39:20,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:20,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881329197] [2021-03-24 13:39:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:20,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:20,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,429 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:20,443 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:20,444 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:20,466 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:20,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:20,483 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 13:39:20,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881329197] [2021-03-24 13:39:20,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:20,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:20,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813638266] [2021-03-24 13:39:20,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:20,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:20,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:20,488 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:20,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 15 transitions, 60 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:20,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:20,532 INFO L129 PetriNetUnfolder]: 11/87 cut-off events. [2021-03-24 13:39:20,532 INFO L130 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2021-03-24 13:39:20,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 87 events. 11/87 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 436 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 194. Up to 22 conditions per place. [2021-03-24 13:39:20,534 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 5 changer transitions 2/26 dead transitions. [2021-03-24 13:39:20,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 149 flow [2021-03-24 13:39:20,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:20,535 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:20,535 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:20,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:20,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,537 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,537 INFO L185 Difference]: Start difference. First operand has 30 places, 15 transitions, 60 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:20,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 149 flow [2021-03-24 13:39:20,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 139 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 13:39:20,539 INFO L241 Difference]: Finished difference. Result has 36 places, 19 transitions, 108 flow [2021-03-24 13:39:20,539 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=19} [2021-03-24 13:39:20,539 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2021-03-24 13:39:20,539 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 19 transitions, 108 flow [2021-03-24 13:39:20,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,539 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:20,539 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:20,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 13:39:20,540 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:20,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1390381937, now seen corresponding path program 3 times [2021-03-24 13:39:20,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:20,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362713909] [2021-03-24 13:39:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:20,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,577 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:20,583 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 13:39:20,584 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 13:39:20,592 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:20,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:20,605 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:20,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:20,617 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 13:39:20,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362713909] [2021-03-24 13:39:20,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:20,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:20,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754291543] [2021-03-24 13:39:20,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:20,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:20,619 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:20,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 19 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:20,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:20,675 INFO L129 PetriNetUnfolder]: 10/95 cut-off events. [2021-03-24 13:39:20,675 INFO L130 PetriNetUnfolder]: For 171/177 co-relation queries the response was YES. [2021-03-24 13:39:20,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 95 events. 10/95 cut-off events. For 171/177 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 509 event pairs, 2 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 262. Up to 25 conditions per place. [2021-03-24 13:39:20,676 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 12 selfloop transitions, 9 changer transitions 1/30 dead transitions. [2021-03-24 13:39:20,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 225 flow [2021-03-24 13:39:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:20,678 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:20,678 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:20,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:20,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,687 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,687 INFO L185 Difference]: Start difference. First operand has 36 places, 19 transitions, 108 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:20,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 225 flow [2021-03-24 13:39:20,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 215 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 13:39:20,689 INFO L241 Difference]: Finished difference. Result has 42 places, 24 transitions, 189 flow [2021-03-24 13:39:20,689 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=42, PETRI_TRANSITIONS=24} [2021-03-24 13:39:20,689 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2021-03-24 13:39:20,689 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 24 transitions, 189 flow [2021-03-24 13:39:20,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,689 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:20,689 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:20,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 13:39:20,690 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:20,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1130172361, now seen corresponding path program 4 times [2021-03-24 13:39:20,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:20,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566767888] [2021-03-24 13:39:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:20,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:20,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:20,737 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:20,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:20,749 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:20,750 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:20,762 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 13:39:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566767888] [2021-03-24 13:39:20,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:20,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:20,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014233306] [2021-03-24 13:39:20,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:20,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:20,765 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:20,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 24 transitions, 189 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:20,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:20,800 INFO L129 PetriNetUnfolder]: 8/101 cut-off events. [2021-03-24 13:39:20,800 INFO L130 PetriNetUnfolder]: For 315/323 co-relation queries the response was YES. [2021-03-24 13:39:20,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 101 events. 8/101 cut-off events. For 315/323 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 580 event pairs, 6 based on Foata normal form. 1/100 useless extension candidates. Maximal degree in co-relation 322. Up to 23 conditions per place. [2021-03-24 13:39:20,802 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 11 changer transitions 2/34 dead transitions. [2021-03-24 13:39:20,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 320 flow [2021-03-24 13:39:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:20,803 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:20,803 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:20,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:20,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,804 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,804 INFO L185 Difference]: Start difference. First operand has 42 places, 24 transitions, 189 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 320 flow [2021-03-24 13:39:20,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 303 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-03-24 13:39:20,811 INFO L241 Difference]: Finished difference. Result has 48 places, 26 transitions, 241 flow [2021-03-24 13:39:20,811 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=48, PETRI_TRANSITIONS=26} [2021-03-24 13:39:20,811 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2021-03-24 13:39:20,811 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 26 transitions, 241 flow [2021-03-24 13:39:20,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,812 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:20,812 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:20,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 13:39:20,812 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:20,812 INFO L82 PathProgramCache]: Analyzing trace with hash 892919981, now seen corresponding path program 5 times [2021-03-24 13:39:20,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:20,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48827666] [2021-03-24 13:39:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:20,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:20,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:20,852 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:20,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:20,864 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:20,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:20,875 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 13:39:20,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48827666] [2021-03-24 13:39:20,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:20,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:20,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046645687] [2021-03-24 13:39:20,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:20,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:20,877 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:20,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 26 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:20,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:20,913 INFO L129 PetriNetUnfolder]: 7/99 cut-off events. [2021-03-24 13:39:20,913 INFO L130 PetriNetUnfolder]: For 450/460 co-relation queries the response was YES. [2021-03-24 13:39:20,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 99 events. 7/99 cut-off events. For 450/460 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 567 event pairs, 5 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 361. Up to 22 conditions per place. [2021-03-24 13:39:20,913 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 12 changer transitions 4/35 dead transitions. [2021-03-24 13:39:20,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 35 transitions, 379 flow [2021-03-24 13:39:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:20,914 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:20,914 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:20,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:20,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:20,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,916 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:20,916 INFO L185 Difference]: Start difference. First operand has 48 places, 26 transitions, 241 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:20,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 35 transitions, 379 flow [2021-03-24 13:39:20,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 35 transitions, 349 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-03-24 13:39:20,918 INFO L241 Difference]: Finished difference. Result has 53 places, 27 transitions, 279 flow [2021-03-24 13:39:20,918 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=53, PETRI_TRANSITIONS=27} [2021-03-24 13:39:20,918 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2021-03-24 13:39:20,918 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 27 transitions, 279 flow [2021-03-24 13:39:20,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,919 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:20,919 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:20,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 13:39:20,919 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2125071045, now seen corresponding path program 6 times [2021-03-24 13:39:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:20,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722429231] [2021-03-24 13:39:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:20,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:20,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:20,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:20,945 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 13:39:20,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 13:39:20,953 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:20,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:20,965 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:20,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:20,976 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 13:39:20,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722429231] [2021-03-24 13:39:20,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:20,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:20,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511432995] [2021-03-24 13:39:20,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:20,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:20,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:20,977 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:20,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 27 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:20,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:20,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:20,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,013 INFO L129 PetriNetUnfolder]: 6/90 cut-off events. [2021-03-24 13:39:21,013 INFO L130 PetriNetUnfolder]: For 574/600 co-relation queries the response was YES. [2021-03-24 13:39:21,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 90 events. 6/90 cut-off events. For 574/600 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 499 event pairs, 6 based on Foata normal form. 6/93 useless extension candidates. Maximal degree in co-relation 361. Up to 23 conditions per place. [2021-03-24 13:39:21,014 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 10 selfloop transitions, 14 changer transitions 1/33 dead transitions. [2021-03-24 13:39:21,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 33 transitions, 389 flow [2021-03-24 13:39:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:21,015 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:21,015 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:21,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,016 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,016 INFO L185 Difference]: Start difference. First operand has 53 places, 27 transitions, 279 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:21,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 33 transitions, 389 flow [2021-03-24 13:39:21,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 33 transitions, 343 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-03-24 13:39:21,019 INFO L241 Difference]: Finished difference. Result has 56 places, 29 transitions, 325 flow [2021-03-24 13:39:21,019 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=56, PETRI_TRANSITIONS=29} [2021-03-24 13:39:21,019 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2021-03-24 13:39:21,019 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 325 flow [2021-03-24 13:39:21,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,019 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,019 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 13:39:21,019 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,020 INFO L82 PathProgramCache]: Analyzing trace with hash -452147191, now seen corresponding path program 7 times [2021-03-24 13:39:21,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431384042] [2021-03-24 13:39:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,036 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,041 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 13:39:21,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 13:39:21,049 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:21,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:21,060 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,071 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 13:39:21,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431384042] [2021-03-24 13:39:21,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927947073] [2021-03-24 13:39:21,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,072 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 29 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,114 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-03-24 13:39:21,115 INFO L130 PetriNetUnfolder]: For 536/565 co-relation queries the response was YES. [2021-03-24 13:39:21,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 87 events. 6/87 cut-off events. For 536/565 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 456 event pairs, 6 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 355. Up to 23 conditions per place. [2021-03-24 13:39:21,115 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 8 selfloop transitions, 12 changer transitions 4/32 dead transitions. [2021-03-24 13:39:21,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 32 transitions, 403 flow [2021-03-24 13:39:21,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-24 13:39:21,116 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-03-24 13:39:21,116 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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 13:39:21,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,117 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,117 INFO L185 Difference]: Start difference. First operand has 56 places, 29 transitions, 325 flow. Second operand 6 states and 187 transitions. [2021-03-24 13:39:21,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 32 transitions, 403 flow [2021-03-24 13:39:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 32 transitions, 383 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-03-24 13:39:21,120 INFO L241 Difference]: Finished difference. Result has 60 places, 27 transitions, 313 flow [2021-03-24 13:39:21,120 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=60, PETRI_TRANSITIONS=27} [2021-03-24 13:39:21,120 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2021-03-24 13:39:21,120 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 27 transitions, 313 flow [2021-03-24 13:39:21,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,120 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,120 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 13:39:21,120 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,121 INFO L82 PathProgramCache]: Analyzing trace with hash -455715067, now seen corresponding path program 8 times [2021-03-24 13:39:21,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570578628] [2021-03-24 13:39:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:21,141 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:21,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:21,151 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,160 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 13:39:21,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570578628] [2021-03-24 13:39:21,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931668116] [2021-03-24 13:39:21,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,162 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 27 transitions, 313 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,194 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2021-03-24 13:39:21,194 INFO L130 PetriNetUnfolder]: For 489/509 co-relation queries the response was YES. [2021-03-24 13:39:21,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 83 events. 5/83 cut-off events. For 489/509 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 425 event pairs, 5 based on Foata normal form. 6/87 useless extension candidates. Maximal degree in co-relation 339. Up to 18 conditions per place. [2021-03-24 13:39:21,194 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 10 selfloop transitions, 10 changer transitions 2/30 dead transitions. [2021-03-24 13:39:21,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 30 transitions, 390 flow [2021-03-24 13:39:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-24 13:39:21,195 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-03-24 13:39:21,195 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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 13:39:21,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,196 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,196 INFO L185 Difference]: Start difference. First operand has 60 places, 27 transitions, 313 flow. Second operand 6 states and 187 transitions. [2021-03-24 13:39:21,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 30 transitions, 390 flow [2021-03-24 13:39:21,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 30 transitions, 308 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-03-24 13:39:21,199 INFO L241 Difference]: Finished difference. Result has 54 places, 27 transitions, 270 flow [2021-03-24 13:39:21,199 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=54, PETRI_TRANSITIONS=27} [2021-03-24 13:39:21,199 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2021-03-24 13:39:21,199 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 27 transitions, 270 flow [2021-03-24 13:39:21,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,199 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,199 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 13:39:21,199 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2128638921, now seen corresponding path program 9 times [2021-03-24 13:39:21,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695771918] [2021-03-24 13:39:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:21,249 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:21,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:21,259 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,260 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,270 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 13:39:21,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695771918] [2021-03-24 13:39:21,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636116929] [2021-03-24 13:39:21,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,271 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 27 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,308 INFO L129 PetriNetUnfolder]: 5/77 cut-off events. [2021-03-24 13:39:21,308 INFO L130 PetriNetUnfolder]: For 292/306 co-relation queries the response was YES. [2021-03-24 13:39:21,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 77 events. 5/77 cut-off events. For 292/306 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 375 event pairs, 5 based on Foata normal form. 5/80 useless extension candidates. Maximal degree in co-relation 293. Up to 18 conditions per place. [2021-03-24 13:39:21,309 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 9 changer transitions 3/31 dead transitions. [2021-03-24 13:39:21,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 31 transitions, 350 flow [2021-03-24 13:39:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:21,310 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:21,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:21,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,311 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,311 INFO L185 Difference]: Start difference. First operand has 54 places, 27 transitions, 270 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:21,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 31 transitions, 350 flow [2021-03-24 13:39:21,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 31 transitions, 322 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-03-24 13:39:21,313 INFO L241 Difference]: Finished difference. Result has 55 places, 26 transitions, 263 flow [2021-03-24 13:39:21,313 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=55, PETRI_TRANSITIONS=26} [2021-03-24 13:39:21,313 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2021-03-24 13:39:21,313 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 26 transitions, 263 flow [2021-03-24 13:39:21,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,313 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,313 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 13:39:21,313 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2084936939, now seen corresponding path program 10 times [2021-03-24 13:39:21,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810451851] [2021-03-24 13:39:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,327 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 13:39:21,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 13:39:21,334 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:21,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:21,344 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,354 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 13:39:21,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810451851] [2021-03-24 13:39:21,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598619464] [2021-03-24 13:39:21,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,355 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 26 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,380 INFO L129 PetriNetUnfolder]: 5/67 cut-off events. [2021-03-24 13:39:21,380 INFO L130 PetriNetUnfolder]: For 232/232 co-relation queries the response was YES. [2021-03-24 13:39:21,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 67 events. 5/67 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 311 event pairs, 1 based on Foata normal form. 1/67 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2021-03-24 13:39:21,381 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 8 changer transitions 2/31 dead transitions. [2021-03-24 13:39:21,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 31 transitions, 345 flow [2021-03-24 13:39:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:21,382 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:21,382 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:21,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,383 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,383 INFO L185 Difference]: Start difference. First operand has 55 places, 26 transitions, 263 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 31 transitions, 345 flow [2021-03-24 13:39:21,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 31 transitions, 323 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-03-24 13:39:21,384 INFO L241 Difference]: Finished difference. Result has 58 places, 25 transitions, 252 flow [2021-03-24 13:39:21,384 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=58, PETRI_TRANSITIONS=25} [2021-03-24 13:39:21,385 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 32 predicate places. [2021-03-24 13:39:21,385 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 25 transitions, 252 flow [2021-03-24 13:39:21,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,385 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,385 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-24 13:39:21,385 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1473450575, now seen corresponding path program 11 times [2021-03-24 13:39:21,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034561336] [2021-03-24 13:39:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,398 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 13:39:21,399 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 13:39:21,406 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:21,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:21,419 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,432 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 13:39:21,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034561336] [2021-03-24 13:39:21,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619619157] [2021-03-24 13:39:21,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,433 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 25 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,462 INFO L129 PetriNetUnfolder]: 3/78 cut-off events. [2021-03-24 13:39:21,462 INFO L130 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2021-03-24 13:39:21,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 78 events. 3/78 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 385 event pairs, 1 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 286. Up to 18 conditions per place. [2021-03-24 13:39:21,462 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 8 changer transitions 2/34 dead transitions. [2021-03-24 13:39:21,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 34 transitions, 404 flow [2021-03-24 13:39:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:21,463 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:21,463 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:21,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,464 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,464 INFO L185 Difference]: Start difference. First operand has 58 places, 25 transitions, 252 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:21,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 34 transitions, 404 flow [2021-03-24 13:39:21,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 34 transitions, 359 flow, removed 11 selfloop flow, removed 5 redundant places. [2021-03-24 13:39:21,466 INFO L241 Difference]: Finished difference. Result has 60 places, 27 transitions, 277 flow [2021-03-24 13:39:21,466 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=60, PETRI_TRANSITIONS=27} [2021-03-24 13:39:21,466 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2021-03-24 13:39:21,466 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 27 transitions, 277 flow [2021-03-24 13:39:21,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,466 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,466 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-24 13:39:21,466 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash 476805071, now seen corresponding path program 12 times [2021-03-24 13:39:21,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352870396] [2021-03-24 13:39:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,478 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:21,478 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:21,489 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:21,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:21,499 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,500 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,509 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 13:39:21,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352870396] [2021-03-24 13:39:21,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880045917] [2021-03-24 13:39:21,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,510 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 27 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,540 INFO L129 PetriNetUnfolder]: 1/91 cut-off events. [2021-03-24 13:39:21,540 INFO L130 PetriNetUnfolder]: For 360/363 co-relation queries the response was YES. [2021-03-24 13:39:21,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 91 events. 1/91 cut-off events. For 360/363 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 519 event pairs, 1 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 341. Up to 20 conditions per place. [2021-03-24 13:39:21,541 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 10 changer transitions 2/36 dead transitions. [2021-03-24 13:39:21,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 36 transitions, 442 flow [2021-03-24 13:39:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:21,542 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:21,542 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:21,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,543 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,543 INFO L185 Difference]: Start difference. First operand has 60 places, 27 transitions, 277 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:21,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 36 transitions, 442 flow [2021-03-24 13:39:21,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 36 transitions, 420 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-03-24 13:39:21,545 INFO L241 Difference]: Finished difference. Result has 64 places, 29 transitions, 334 flow [2021-03-24 13:39:21,545 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=64, PETRI_TRANSITIONS=29} [2021-03-24 13:39:21,545 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2021-03-24 13:39:21,545 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 29 transitions, 334 flow [2021-03-24 13:39:21,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,545 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,545 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-24 13:39:21,546 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1221507569, now seen corresponding path program 13 times [2021-03-24 13:39:21,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607877195] [2021-03-24 13:39:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,558 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:21,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:21,573 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:21,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:21,583 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,584 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,593 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 13:39:21,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607877195] [2021-03-24 13:39:21,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731809071] [2021-03-24 13:39:21,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,594 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 29 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,619 INFO L129 PetriNetUnfolder]: 1/84 cut-off events. [2021-03-24 13:39:21,619 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2021-03-24 13:39:21,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 84 events. 1/84 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 458 event pairs, 0 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 344. Up to 19 conditions per place. [2021-03-24 13:39:21,619 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 18 selfloop transitions, 10 changer transitions 2/38 dead transitions. [2021-03-24 13:39:21,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 38 transitions, 506 flow [2021-03-24 13:39:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:21,620 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:21,620 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:21,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,621 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,621 INFO L185 Difference]: Start difference. First operand has 64 places, 29 transitions, 334 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:21,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 38 transitions, 506 flow [2021-03-24 13:39:21,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 38 transitions, 485 flow, removed 7 selfloop flow, removed 3 redundant places. [2021-03-24 13:39:21,623 INFO L241 Difference]: Finished difference. Result has 69 places, 31 transitions, 389 flow [2021-03-24 13:39:21,624 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=69, PETRI_TRANSITIONS=31} [2021-03-24 13:39:21,624 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 43 predicate places. [2021-03-24 13:39:21,624 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 31 transitions, 389 flow [2021-03-24 13:39:21,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,624 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,624 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-24 13:39:21,624 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2080382099, now seen corresponding path program 14 times [2021-03-24 13:39:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234986910] [2021-03-24 13:39:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,635 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:21,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:21,647 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:21,647 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:21,657 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,672 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 13:39:21,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234986910] [2021-03-24 13:39:21,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109142592] [2021-03-24 13:39:21,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,674 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 31 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,699 INFO L129 PetriNetUnfolder]: 1/77 cut-off events. [2021-03-24 13:39:21,699 INFO L130 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2021-03-24 13:39:21,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 77 events. 1/77 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 396 event pairs, 0 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 338. Up to 19 conditions per place. [2021-03-24 13:39:21,699 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 9 changer transitions 3/36 dead transitions. [2021-03-24 13:39:21,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 36 transitions, 504 flow [2021-03-24 13:39:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-24 13:39:21,700 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-03-24 13:39:21,700 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-24 13:39:21,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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 13:39:21,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,701 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,701 INFO L185 Difference]: Start difference. First operand has 69 places, 31 transitions, 389 flow. Second operand 6 states and 187 transitions. [2021-03-24 13:39:21,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 36 transitions, 504 flow [2021-03-24 13:39:21,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 36 transitions, 485 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-03-24 13:39:21,704 INFO L241 Difference]: Finished difference. Result has 72 places, 30 transitions, 392 flow [2021-03-24 13:39:21,704 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=72, PETRI_TRANSITIONS=30} [2021-03-24 13:39:21,704 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2021-03-24 13:39:21,704 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 30 transitions, 392 flow [2021-03-24 13:39:21,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,704 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,704 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-24 13:39:21,704 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash -618143921, now seen corresponding path program 15 times [2021-03-24 13:39:21,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472294368] [2021-03-24 13:39:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,720 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,720 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:21,730 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:21,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:21,743 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,754 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 13:39:21,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472294368] [2021-03-24 13:39:21,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950487898] [2021-03-24 13:39:21,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,755 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 30 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,787 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-03-24 13:39:21,787 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2021-03-24 13:39:21,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 83 events. 0/83 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 447 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-03-24 13:39:21,787 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 18 selfloop transitions, 10 changer transitions 2/38 dead transitions. [2021-03-24 13:39:21,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 38 transitions, 571 flow [2021-03-24 13:39:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:21,788 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:21,788 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:21,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,789 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,789 INFO L185 Difference]: Start difference. First operand has 72 places, 30 transitions, 392 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:21,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 38 transitions, 571 flow [2021-03-24 13:39:21,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 38 transitions, 539 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-03-24 13:39:21,792 INFO L241 Difference]: Finished difference. Result has 75 places, 33 transitions, 467 flow [2021-03-24 13:39:21,792 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=75, PETRI_TRANSITIONS=33} [2021-03-24 13:39:21,792 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2021-03-24 13:39:21,792 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 33 transitions, 467 flow [2021-03-24 13:39:21,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,792 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,792 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-24 13:39:21,792 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash -79698959, now seen corresponding path program 16 times [2021-03-24 13:39:21,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894986672] [2021-03-24 13:39:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:21,811 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:21,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:21,821 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,831 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 13:39:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894986672] [2021-03-24 13:39:21,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177038737] [2021-03-24 13:39:21,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,832 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 33 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,859 INFO L129 PetriNetUnfolder]: 0/76 cut-off events. [2021-03-24 13:39:21,859 INFO L130 PetriNetUnfolder]: For 519/521 co-relation queries the response was YES. [2021-03-24 13:39:21,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 76 events. 0/76 cut-off events. For 519/521 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 390 event pairs, 0 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-03-24 13:39:21,859 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 11 changer transitions 2/37 dead transitions. [2021-03-24 13:39:21,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 37 transitions, 564 flow [2021-03-24 13:39:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:21,860 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:21,860 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:21,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:21,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,861 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,861 INFO L185 Difference]: Start difference. First operand has 75 places, 33 transitions, 467 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:21,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 37 transitions, 564 flow [2021-03-24 13:39:21,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 37 transitions, 551 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-03-24 13:39:21,864 INFO L241 Difference]: Finished difference. Result has 78 places, 32 transitions, 466 flow [2021-03-24 13:39:21,864 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=78, PETRI_TRANSITIONS=32} [2021-03-24 13:39:21,864 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 52 predicate places. [2021-03-24 13:39:21,864 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 32 transitions, 466 flow [2021-03-24 13:39:21,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,864 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,865 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-24 13:39:21,865 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1798042665, now seen corresponding path program 17 times [2021-03-24 13:39:21,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585719208] [2021-03-24 13:39:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,876 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:21,882 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:21,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:21,892 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,902 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 13:39:21,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585719208] [2021-03-24 13:39:21,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477892986] [2021-03-24 13:39:21,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,903 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 32 transitions, 466 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:21,938 INFO L129 PetriNetUnfolder]: 0/69 cut-off events. [2021-03-24 13:39:21,938 INFO L130 PetriNetUnfolder]: For 582/588 co-relation queries the response was YES. [2021-03-24 13:39:21,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 69 events. 0/69 cut-off events. For 582/588 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 332 event pairs, 0 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-03-24 13:39:21,938 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 14 selfloop transitions, 8 changer transitions 4/34 dead transitions. [2021-03-24 13:39:21,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 34 transitions, 540 flow [2021-03-24 13:39:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-03-24 13:39:21,939 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-03-24 13:39:21,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-03-24 13:39:21,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-03-24 13:39:21,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:21,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-03-24 13:39:21,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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 13:39:21,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,940 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:21,940 INFO L185 Difference]: Start difference. First operand has 78 places, 32 transitions, 466 flow. Second operand 6 states and 186 transitions. [2021-03-24 13:39:21,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 34 transitions, 540 flow [2021-03-24 13:39:21,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 34 transitions, 501 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-03-24 13:39:21,942 INFO L241 Difference]: Finished difference. Result has 78 places, 29 transitions, 400 flow [2021-03-24 13:39:21,942 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=78, PETRI_TRANSITIONS=29} [2021-03-24 13:39:21,943 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 52 predicate places. [2021-03-24 13:39:21,943 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 29 transitions, 400 flow [2021-03-24 13:39:21,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,943 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:21,943 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:21,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-24 13:39:21,943 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1632985331, now seen corresponding path program 18 times [2021-03-24 13:39:21,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:21,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871838104] [2021-03-24 13:39:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:21,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:21,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:21,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:21,964 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 13:39:21,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 13:39:21,971 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:21,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:21,980 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:21,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:21,988 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 13:39:21,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871838104] [2021-03-24 13:39:21,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:21,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:21,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270445400] [2021-03-24 13:39:21,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:21,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:21,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:21,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:21,990 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:21,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 29 transitions, 400 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:21,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:21,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:21,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:22,021 INFO L129 PetriNetUnfolder]: 0/60 cut-off events. [2021-03-24 13:39:22,021 INFO L130 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2021-03-24 13:39:22,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 60 events. 0/60 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 264 event pairs, 0 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-03-24 13:39:22,021 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 15 selfloop transitions, 8 changer transitions 2/33 dead transitions. [2021-03-24 13:39:22,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 33 transitions, 485 flow [2021-03-24 13:39:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 13:39:22,022 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 13:39:22,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 13:39:22,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 13:39:22,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:22,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 13:39:22,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 13:39:22,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,023 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,023 INFO L185 Difference]: Start difference. First operand has 78 places, 29 transitions, 400 flow. Second operand 6 states and 188 transitions. [2021-03-24 13:39:22,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 33 transitions, 485 flow [2021-03-24 13:39:22,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 33 transitions, 446 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-03-24 13:39:22,025 INFO L241 Difference]: Finished difference. Result has 77 places, 29 transitions, 389 flow [2021-03-24 13:39:22,025 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=77, PETRI_TRANSITIONS=29} [2021-03-24 13:39:22,025 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2021-03-24 13:39:22,025 INFO L480 AbstractCegarLoop]: Abstraction has has 77 places, 29 transitions, 389 flow [2021-03-24 13:39:22,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,026 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:22,026 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:22,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-24 13:39:22,026 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:22,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:22,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1346663061, now seen corresponding path program 19 times [2021-03-24 13:39:22,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:22,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516501802] [2021-03-24 13:39:22,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:22,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:22,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:22,037 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 13:39:22,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 13:39:22,044 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:22,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:22,053 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:22,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:22,062 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 13:39:22,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516501802] [2021-03-24 13:39:22,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:22,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:22,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697540367] [2021-03-24 13:39:22,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:22,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:22,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:22,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:22,063 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:22,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 29 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:22,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:22,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:22,084 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-03-24 13:39:22,085 INFO L130 PetriNetUnfolder]: For 353/353 co-relation queries the response was YES. [2021-03-24 13:39:22,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 53 events. 0/53 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 208 event pairs, 0 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-03-24 13:39:22,085 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 7 changer transitions 3/31 dead transitions. [2021-03-24 13:39:22,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 31 transitions, 443 flow [2021-03-24 13:39:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-24 13:39:22,086 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-03-24 13:39:22,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-24 13:39:22,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-24 13:39:22,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:22,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-24 13:39:22,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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 13:39:22,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,087 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,087 INFO L185 Difference]: Start difference. First operand has 77 places, 29 transitions, 389 flow. Second operand 6 states and 187 transitions. [2021-03-24 13:39:22,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 31 transitions, 443 flow [2021-03-24 13:39:22,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 31 transitions, 433 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 13:39:22,089 INFO L241 Difference]: Finished difference. Result has 80 places, 26 transitions, 345 flow [2021-03-24 13:39:22,089 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=80, PETRI_TRANSITIONS=26} [2021-03-24 13:39:22,089 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2021-03-24 13:39:22,089 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 26 transitions, 345 flow [2021-03-24 13:39:22,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,089 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:22,089 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:22,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-24 13:39:22,089 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash -897088213, now seen corresponding path program 20 times [2021-03-24 13:39:22,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:22,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090958899] [2021-03-24 13:39:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:22,096 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:22,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:22,100 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:22,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:22,110 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 13:39:22,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 13:39:22,120 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:22,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:22,130 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 13:39:22,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090958899] [2021-03-24 13:39:22,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:22,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:22,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277400976] [2021-03-24 13:39:22,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:22,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:22,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:22,131 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:22,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 26 transitions, 345 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:22,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:22,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:22,150 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-24 13:39:22,151 INFO L130 PetriNetUnfolder]: For 306/306 co-relation queries the response was YES. [2021-03-24 13:39:22,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 45 events. 0/45 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 0 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-03-24 13:39:22,151 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 9 selfloop transitions, 7 changer transitions 3/27 dead transitions. [2021-03-24 13:39:22,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 27 transitions, 387 flow [2021-03-24 13:39:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-03-24 13:39:22,152 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-03-24 13:39:22,152 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-03-24 13:39:22,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-03-24 13:39:22,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:22,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-03-24 13:39:22,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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 13:39:22,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,152 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,153 INFO L185 Difference]: Start difference. First operand has 80 places, 26 transitions, 345 flow. Second operand 6 states and 186 transitions. [2021-03-24 13:39:22,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 27 transitions, 387 flow [2021-03-24 13:39:22,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 27 transitions, 366 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-24 13:39:22,154 INFO L241 Difference]: Finished difference. Result has 79 places, 23 transitions, 286 flow [2021-03-24 13:39:22,154 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=79, PETRI_TRANSITIONS=23} [2021-03-24 13:39:22,154 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 53 predicate places. [2021-03-24 13:39:22,154 INFO L480 AbstractCegarLoop]: Abstraction has has 79 places, 23 transitions, 286 flow [2021-03-24 13:39:22,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,155 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:22,155 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:22,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-24 13:39:22,155 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1445521453, now seen corresponding path program 21 times [2021-03-24 13:39:22,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:22,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872938194] [2021-03-24 13:39:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:22,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:22,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,162 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:22,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:22,170 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:22,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:22,179 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:22,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:22,188 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 13:39:22,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872938194] [2021-03-24 13:39:22,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:22,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:22,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196468810] [2021-03-24 13:39:22,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:22,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:22,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:22,189 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:22,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 23 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:22,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:22,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:22,219 INFO L129 PetriNetUnfolder]: 0/37 cut-off events. [2021-03-24 13:39:22,219 INFO L130 PetriNetUnfolder]: For 244/246 co-relation queries the response was YES. [2021-03-24 13:39:22,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 37 events. 0/37 cut-off events. For 244/246 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 2/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 13:39:22,219 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 8 selfloop transitions, 4 changer transitions 4/24 dead transitions. [2021-03-24 13:39:22,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 24 transitions, 322 flow [2021-03-24 13:39:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-03-24 13:39:22,220 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-03-24 13:39:22,220 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-03-24 13:39:22,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-03-24 13:39:22,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:22,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-03-24 13:39:22,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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 13:39:22,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,221 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,221 INFO L185 Difference]: Start difference. First operand has 79 places, 23 transitions, 286 flow. Second operand 6 states and 186 transitions. [2021-03-24 13:39:22,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 24 transitions, 322 flow [2021-03-24 13:39:22,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 24 transitions, 267 flow, removed 4 selfloop flow, removed 11 redundant places. [2021-03-24 13:39:22,222 INFO L241 Difference]: Finished difference. Result has 68 places, 19 transitions, 187 flow [2021-03-24 13:39:22,222 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=68, PETRI_TRANSITIONS=19} [2021-03-24 13:39:22,222 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2021-03-24 13:39:22,222 INFO L480 AbstractCegarLoop]: Abstraction has has 68 places, 19 transitions, 187 flow [2021-03-24 13:39:22,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,222 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:22,222 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:22,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-24 13:39:22,223 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash 244298485, now seen corresponding path program 22 times [2021-03-24 13:39:22,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:22,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799737506] [2021-03-24 13:39:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:22,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:22,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:22,232 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 13:39:22,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 13:39:22,240 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:22,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:22,250 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:22,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:22,258 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 13:39:22,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799737506] [2021-03-24 13:39:22,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:22,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:22,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442356573] [2021-03-24 13:39:22,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:22,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:22,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:22,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:22,259 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:22,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 19 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:22,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:22,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:22,283 INFO L129 PetriNetUnfolder]: 0/28 cut-off events. [2021-03-24 13:39:22,283 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2021-03-24 13:39:22,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 28 events. 0/28 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 52 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 13:39:22,283 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 5 selfloop transitions, 3 changer transitions 3/19 dead transitions. [2021-03-24 13:39:22,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 19 transitions, 209 flow [2021-03-24 13:39:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2021-03-24 13:39:22,284 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.782051282051282 [2021-03-24 13:39:22,284 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 183 transitions. [2021-03-24 13:39:22,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 183 transitions. [2021-03-24 13:39:22,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:22,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 183 transitions. [2021-03-24 13:39:22,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 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 13:39:22,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,285 INFO L185 Difference]: Start difference. First operand has 68 places, 19 transitions, 187 flow. Second operand 6 states and 183 transitions. [2021-03-24 13:39:22,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 19 transitions, 209 flow [2021-03-24 13:39:22,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 19 transitions, 162 flow, removed 3 selfloop flow, removed 12 redundant places. [2021-03-24 13:39:22,286 INFO L241 Difference]: Finished difference. Result has 55 places, 16 transitions, 111 flow [2021-03-24 13:39:22,286 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=55, PETRI_TRANSITIONS=16} [2021-03-24 13:39:22,286 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2021-03-24 13:39:22,286 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 16 transitions, 111 flow [2021-03-24 13:39:22,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,286 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:22,286 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:22,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-24 13:39:22,286 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:22,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1958479669, now seen corresponding path program 23 times [2021-03-24 13:39:22,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:22,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245700033] [2021-03-24 13:39:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:22,292 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:22,292 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:22,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:22,302 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:22,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:22,310 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:22,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:22,319 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 13:39:22,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245700033] [2021-03-24 13:39:22,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:22,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:22,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343142255] [2021-03-24 13:39:22,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:22,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:22,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:22,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:22,320 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:22,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 16 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:22,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:22,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:22,342 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-24 13:39:22,342 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2021-03-24 13:39:22,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 20 events. 0/20 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 13:39:22,342 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 3 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-24 13:39:22,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 16 transitions, 127 flow [2021-03-24 13:39:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:22,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2021-03-24 13:39:22,343 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2021-03-24 13:39:22,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2021-03-24 13:39:22,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2021-03-24 13:39:22,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:22,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2021-03-24 13:39:22,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 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 13:39:22,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,344 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,344 INFO L185 Difference]: Start difference. First operand has 55 places, 16 transitions, 111 flow. Second operand 6 states and 182 transitions. [2021-03-24 13:39:22,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 16 transitions, 127 flow [2021-03-24 13:39:22,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 16 transitions, 100 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-03-24 13:39:22,344 INFO L241 Difference]: Finished difference. Result has 48 places, 13 transitions, 61 flow [2021-03-24 13:39:22,344 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=61, PETRI_PLACES=48, PETRI_TRANSITIONS=13} [2021-03-24 13:39:22,344 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2021-03-24 13:39:22,344 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 13 transitions, 61 flow [2021-03-24 13:39:22,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,345 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:39:22,345 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:39:22,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-24 13:39:22,345 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:39:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:39:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1484748849, now seen corresponding path program 24 times [2021-03-24 13:39:22,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:39:22,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707514055] [2021-03-24 13:39:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:39:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:39:22,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:39:22,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:39:22,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:39:22,355 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:39:22,360 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 13:39:22,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 13:39:22,372 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 13:39:22,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 13:39:22,380 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 13:39:22,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707514055] [2021-03-24 13:39:22,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:39:22,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 13:39:22,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285102545] [2021-03-24 13:39:22,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 13:39:22,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:39:22,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 13:39:22,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 13:39:22,381 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 13:39:22,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 13 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:39:22,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 13:39:22,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:39:22,399 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-24 13:39:22,399 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-24 13:39:22,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 12 events. 0/12 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 13:39:22,399 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-03-24 13:39:22,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 12 transitions, 65 flow [2021-03-24 13:39:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:39:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:39:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2021-03-24 13:39:22,400 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7649572649572649 [2021-03-24 13:39:22,400 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 179 transitions. [2021-03-24 13:39:22,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 179 transitions. [2021-03-24 13:39:22,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:39:22,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 179 transitions. [2021-03-24 13:39:22,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,400 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 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 13:39:22,400 INFO L185 Difference]: Start difference. First operand has 48 places, 13 transitions, 61 flow. Second operand 6 states and 179 transitions. [2021-03-24 13:39:22,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 12 transitions, 65 flow [2021-03-24 13:39:22,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 12 transitions, 51 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-03-24 13:39:22,401 INFO L241 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2021-03-24 13:39:22,401 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2021-03-24 13:39:22,401 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2021-03-24 13:39:22,401 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2021-03-24 13:39:22,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 13:39:22,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-24 13:39:22,404 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:39:22 BasicIcfg [2021-03-24 13:39:22,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:39:22,405 INFO L168 Benchmark]: Toolchain (without parser) took 2897.98 ms. Allocated memory was 255.9 MB in the beginning and 438.3 MB in the end (delta: 182.5 MB). Free memory was 236.6 MB in the beginning and 354.4 MB in the end (delta: -117.8 MB). Peak memory consumption was 65.0 MB. Max. memory is 16.0 GB. [2021-03-24 13:39:22,405 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 178.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:39:22,405 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.60 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: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 13:39:22,405 INFO L168 Benchmark]: Boogie Preprocessor took 9.22 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 809.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:39:22,405 INFO L168 Benchmark]: RCFGBuilder took 142.60 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 240.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.0 GB. [2021-03-24 13:39:22,405 INFO L168 Benchmark]: TraceAbstraction took 2723.97 ms. Allocated memory was 255.9 MB in the beginning and 438.3 MB in the end (delta: 182.5 MB). Free memory was 240.3 MB in the beginning and 354.4 MB in the end (delta: -114.1 MB). Peak memory consumption was 67.6 MB. Max. memory is 16.0 GB. [2021-03-24 13:39:22,405 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 178.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.60 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: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.22 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 809.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 142.60 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 240.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2723.97 ms. Allocated memory was 255.9 MB in the beginning and 438.3 MB in the end (delta: 182.5 MB). Free memory was 240.3 MB in the beginning and 354.4 MB in the end (delta: -114.1 MB). Peak memory consumption was 67.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 64.1ms, 30 PlacesBefore, 26 PlacesAfterwards, 29 TransitionsBefore, 25 TransitionsAfterwards, 216 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 66 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 66, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 60, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 60, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 66, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 60, unknown conditional: 0, unknown unconditional: 60] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2641.8ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1015.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 138.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 197 SDtfs, 247 SDslu, 128 SDs, 0 SdLazy, 358 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 206.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1031.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=467occurred in iteration=18, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.5ms SsaConstructionTime, 55.5ms SatisfiabilityAnalysisTime, 1248.1ms InterpolantComputationTime, 351 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 324 ConstructedInterpolants, 0 QuantifiedInterpolants, 4346 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 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...