/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/time-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-11 01:29:46,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-11 01:29:46,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-11 01:29:47,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-11 01:29:47,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-11 01:29:47,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-11 01:29:47,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-11 01:29:47,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-11 01:29:47,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-11 01:29:47,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-11 01:29:47,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-11 01:29:47,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-11 01:29:47,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-11 01:29:47,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-11 01:29:47,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-11 01:29:47,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-11 01:29:47,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-11 01:29:47,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-11 01:29:47,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-11 01:29:47,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-11 01:29:47,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-06-11 01:29:47,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-11 01:29:47,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-11 01:29:47,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-11 01:29:47,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-11 01:29:47,136 INFO L138 SettingsManager]: * Use SBE=true [2021-06-11 01:29:47,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-11 01:29:47,137 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-11 01:29:47,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-11 01:29:47,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-11 01:29:47,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-11 01:29:47,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-11 01:29:47,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-11 01:29:47,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-11 01:29:47,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-11 01:29:47,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-11 01:29:47,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-11 01:29:47,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-11 01:29:47,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-11 01:29:47,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-11 01:29:47,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-11 01:29:47,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-11 01:29:47,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 01:29:47,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-11 01:29:47,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-11 01:29:47,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-11 01:29:47,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-11 01:29:47,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-11 01:29:47,140 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-11 01:29:47,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-11 01:29:47,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-11 01:29:47,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-11 01:29:47,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-11 01:29:47,459 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-11 01:29:47,460 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-11 01:29:47,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/time-subst.wvr.bpl [2021-06-11 01:29:47,460 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/time-subst.wvr.bpl' [2021-06-11 01:29:47,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-11 01:29:47,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-11 01:29:47,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-11 01:29:47,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-11 01:29:47,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-11 01:29:47,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-11 01:29:47,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-11 01:29:47,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-11 01:29:47,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-11 01:29:47,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... [2021-06-11 01:29:47,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-11 01:29:47,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-11 01:29:47,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-11 01:29:47,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-11 01:29:47,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 01:29:47,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-11 01:29:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-11 01:29:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-11 01:29:47,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-11 01:29:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-11 01:29:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-11 01:29:47,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-11 01:29:47,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-11 01:29:47,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-11 01:29:47,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-11 01:29:47,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-11 01:29:47,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-11 01:29:47,590 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-11 01:29:47,787 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-11 01:29:47,787 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-11 01:29:47,788 INFO L202 PluginConnector]: Adding new model time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 01:29:47 BoogieIcfgContainer [2021-06-11 01:29:47,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-11 01:29:47,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-11 01:29:47,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-11 01:29:47,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-11 01:29:47,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 01:29:47" (1/2) ... [2021-06-11 01:29:47,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a984bc and model type time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.06 01:29:47, skipping insertion in model container [2021-06-11 01:29:47,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 01:29:47" (2/2) ... [2021-06-11 01:29:47,795 INFO L111 eAbstractionObserver]: Analyzing ICFG time-subst.wvr.bpl [2021-06-11 01:29:47,799 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-11 01:29:47,802 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-11 01:29:47,803 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-11 01:29:47,864 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-11 01:29:47,880 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-11 01:29:47,897 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-11 01:29:47,897 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-11 01:29:47,897 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-11 01:29:47,897 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-11 01:29:47,897 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-11 01:29:47,897 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-11 01:29:47,897 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-11 01:29:47,897 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-11 01:29:47,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-11 01:29:47,929 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-11 01:29:47,929 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-11 01:29:47,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 01:29:47,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-11 01:29:47,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-11 01:29:47,935 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-11 01:29:47,945 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-06-11 01:29:47,948 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-06-11 01:29:47,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-06-11 01:29:47,972 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-11 01:29:47,972 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-11 01:29:47,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 14 events. 0/14 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 01:29:47,974 INFO L151 LiptonReduction]: Number of co-enabled transitions 48 [2021-06-11 01:29:48,209 INFO L163 LiptonReduction]: Checked pairs total: 18 [2021-06-11 01:29:48,209 INFO L165 LiptonReduction]: Total number of compositions: 4 [2021-06-11 01:29:48,211 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 277 [2021-06-11 01:29:48,236 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-06-11 01:29:48,237 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-11 01:29:48,237 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:48,237 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:48,238 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1090334259, now seen corresponding path program 1 times [2021-06-11 01:29:48,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:48,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544979365] [2021-06-11 01:29:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:48,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:48,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:48,445 INFO L142 QuantifierPusher]: treesize reduction 49, result has 40.2 percent of original size [2021-06-11 01:29:48,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-06-11 01:29:48,473 INFO L142 QuantifierPusher]: treesize reduction 9, result has 83.6 percent of original size [2021-06-11 01:29:48,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-06-11 01:29:48,541 INFO L142 QuantifierPusher]: treesize reduction 13, result has 81.7 percent of original size [2021-06-11 01:29:48,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-06-11 01:29:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:48,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544979365] [2021-06-11 01:29:48,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:48,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:48,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000033969] [2021-06-11 01:29:48,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:48,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:48,658 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:48,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 38 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:48,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:48,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:48,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:48,821 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-06-11 01:29:48,821 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-06-11 01:29:48,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 29 events. 3/29 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 1 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 42. Up to 7 conditions per place. [2021-06-11 01:29:48,823 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-06-11 01:29:48,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-06-11 01:29:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-11 01:29:48,833 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-06-11 01:29:48,833 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-11 01:29:48,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-11 01:29:48,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:48,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-11 01:29:48,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:48,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:48,847 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:48,849 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-06-11 01:29:48,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-06-11 01:29:48,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-11 01:29:48,854 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-06-11 01:29:48,855 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=11} [2021-06-11 01:29:48,856 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-06-11 01:29:48,856 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-06-11 01:29:48,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:48,856 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:48,857 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:48,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-11 01:29:48,857 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:48,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1561745357, now seen corresponding path program 2 times [2021-06-11 01:29:48,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:48,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224496602] [2021-06-11 01:29:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:48,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:48,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:48,992 INFO L142 QuantifierPusher]: treesize reduction 88, result has 34.8 percent of original size [2021-06-11 01:29:48,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-06-11 01:29:49,023 INFO L142 QuantifierPusher]: treesize reduction 20, result has 83.1 percent of original size [2021-06-11 01:29:49,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-06-11 01:29:49,108 INFO L142 QuantifierPusher]: treesize reduction 8, result has 86.7 percent of original size [2021-06-11 01:29:49,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-06-11 01:29:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:49,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224496602] [2021-06-11 01:29:49,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:49,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:49,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371170445] [2021-06-11 01:29:49,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:49,155 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:49,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 41 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:49,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:49,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:49,340 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-06-11 01:29:49,340 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-06-11 01:29:49,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 29 events. 2/29 cut-off events. For 24/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 78 event pairs, 0 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2021-06-11 01:29:49,341 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-06-11 01:29:49,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 85 flow [2021-06-11 01:29:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-11 01:29:49,344 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-06-11 01:29:49,344 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-11 01:29:49,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-11 01:29:49,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:49,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-11 01:29:49,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,346 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,346 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-06-11 01:29:49,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 85 flow [2021-06-11 01:29:49,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-11 01:29:49,347 INFO L241 Difference]: Finished difference. Result has 25 places, 11 transitions, 51 flow [2021-06-11 01:29:49,348 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=51, PETRI_PLACES=25, PETRI_TRANSITIONS=11} [2021-06-11 01:29:49,348 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-06-11 01:29:49,348 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 11 transitions, 51 flow [2021-06-11 01:29:49,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,350 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:49,350 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:49,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-11 01:29:49,350 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:49,351 INFO L82 PathProgramCache]: Analyzing trace with hash 687506555, now seen corresponding path program 3 times [2021-06-11 01:29:49,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:49,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295261199] [2021-06-11 01:29:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:49,462 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:49,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:49,472 INFO L142 QuantifierPusher]: treesize reduction 116, result has 22.1 percent of original size [2021-06-11 01:29:49,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-06-11 01:29:49,501 INFO L142 QuantifierPusher]: treesize reduction 107, result has 43.7 percent of original size [2021-06-11 01:29:49,507 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-06-11 01:29:49,587 INFO L142 QuantifierPusher]: treesize reduction 143, result has 48.9 percent of original size [2021-06-11 01:29:49,592 INFO L147 QuantifierPusher]: treesize reduction 16, result has 88.3 percent of original size 121 [2021-06-11 01:29:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295261199] [2021-06-11 01:29:49,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:49,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:49,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570950014] [2021-06-11 01:29:49,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:49,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:49,677 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:49,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 11 transitions, 51 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:49,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:49,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:49,818 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-06-11 01:29:49,818 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-06-11 01:29:49,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 23 events. 1/23 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-06-11 01:29:49,819 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-06-11 01:29:49,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 93 flow [2021-06-11 01:29:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-11 01:29:49,820 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-06-11 01:29:49,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-11 01:29:49,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-11 01:29:49,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:49,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-11 01:29:49,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,823 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,823 INFO L185 Difference]: Start difference. First operand has 25 places, 11 transitions, 51 flow. Second operand 5 states and 79 transitions. [2021-06-11 01:29:49,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 93 flow [2021-06-11 01:29:49,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 74 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-06-11 01:29:49,825 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-06-11 01:29:49,825 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=12} [2021-06-11 01:29:49,825 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-06-11 01:29:49,825 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 12 transitions, 62 flow [2021-06-11 01:29:49,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:49,826 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:49,826 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:49,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-11 01:29:49,826 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:49,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:49,827 INFO L82 PathProgramCache]: Analyzing trace with hash 702870827, now seen corresponding path program 4 times [2021-06-11 01:29:49,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:49,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686308515] [2021-06-11 01:29:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:49,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:49,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:49,881 INFO L142 QuantifierPusher]: treesize reduction 25, result has 56.9 percent of original size [2021-06-11 01:29:49,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-06-11 01:29:49,900 INFO L142 QuantifierPusher]: treesize reduction 41, result has 59.0 percent of original size [2021-06-11 01:29:49,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-06-11 01:29:49,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:49,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-06-11 01:29:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:50,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686308515] [2021-06-11 01:29:50,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:50,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:50,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875941726] [2021-06-11 01:29:50,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:50,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:50,002 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:50,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 12 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:50,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:50,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:50,183 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-06-11 01:29:50,183 INFO L130 PetriNetUnfolder]: For 34/37 co-relation queries the response was YES. [2021-06-11 01:29:50,184 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 20 events. 1/20 cut-off events. For 34/37 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 1 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2021-06-11 01:29:50,184 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 4/14 dead transitions. [2021-06-11 01:29:50,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 92 flow [2021-06-11 01:29:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-06-11 01:29:50,186 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2021-06-11 01:29:50,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-06-11 01:29:50,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-06-11 01:29:50,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:50,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-06-11 01:29:50,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,188 INFO L185 Difference]: Start difference. First operand has 27 places, 12 transitions, 62 flow. Second operand 5 states and 78 transitions. [2021-06-11 01:29:50,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 92 flow [2021-06-11 01:29:50,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 14 transitions, 88 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-11 01:29:50,189 INFO L241 Difference]: Finished difference. Result has 30 places, 10 transitions, 49 flow [2021-06-11 01:29:50,190 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=30, PETRI_TRANSITIONS=10} [2021-06-11 01:29:50,190 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-06-11 01:29:50,190 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 10 transitions, 49 flow [2021-06-11 01:29:50,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,190 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:50,196 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:50,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-11 01:29:50,197 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:50,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1534039727, now seen corresponding path program 5 times [2021-06-11 01:29:50,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:50,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825393712] [2021-06-11 01:29:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:50,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:50,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:50,270 INFO L142 QuantifierPusher]: treesize reduction 136, result has 43.3 percent of original size [2021-06-11 01:29:50,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-06-11 01:29:50,328 INFO L142 QuantifierPusher]: treesize reduction 65, result has 75.3 percent of original size [2021-06-11 01:29:50,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 198 [2021-06-11 01:29:50,469 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-06-11 01:29:50,485 INFO L142 QuantifierPusher]: treesize reduction 33, result has 73.6 percent of original size [2021-06-11 01:29:50,487 INFO L147 QuantifierPusher]: treesize reduction 12, result has 87.0 percent of original size 80 [2021-06-11 01:29:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:50,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825393712] [2021-06-11 01:29:50,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:50,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:50,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448675894] [2021-06-11 01:29:50,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:50,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:50,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:50,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:50,578 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:50,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 10 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:50,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:50,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:50,771 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-11 01:29:50,777 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-11 01:29:50,777 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-11 01:29:50,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 16 events. 0/16 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-11 01:29:50,778 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 2/12 dead transitions. [2021-06-11 01:29:50,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 80 flow [2021-06-11 01:29:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-11 01:29:50,779 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-06-11 01:29:50,780 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-11 01:29:50,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-11 01:29:50,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:50,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-11 01:29:50,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,781 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,781 INFO L185 Difference]: Start difference. First operand has 30 places, 10 transitions, 49 flow. Second operand 5 states and 77 transitions. [2021-06-11 01:29:50,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 80 flow [2021-06-11 01:29:50,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 47 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-06-11 01:29:50,783 INFO L241 Difference]: Finished difference. Result has 23 places, 10 transitions, 35 flow [2021-06-11 01:29:50,783 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=35, PETRI_PLACES=23, PETRI_TRANSITIONS=10} [2021-06-11 01:29:50,783 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-06-11 01:29:50,783 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 10 transitions, 35 flow [2021-06-11 01:29:50,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,783 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 01:29:50,783 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 01:29:50,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-11 01:29:50,784 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 01:29:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 01:29:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash -183709333, now seen corresponding path program 6 times [2021-06-11 01:29:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 01:29:50,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005343266] [2021-06-11 01:29:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 01:29:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 01:29:50,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 01:29:50,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 01:29:50,814 INFO L142 QuantifierPusher]: treesize reduction 71, result has 47.8 percent of original size [2021-06-11 01:29:50,815 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-06-11 01:29:50,852 INFO L142 QuantifierPusher]: treesize reduction 42, result has 71.0 percent of original size [2021-06-11 01:29:50,854 INFO L147 QuantifierPusher]: treesize reduction 6, result has 94.2 percent of original size 97 [2021-06-11 01:29:50,900 INFO L142 QuantifierPusher]: treesize reduction 6, result has 91.0 percent of original size [2021-06-11 01:29:50,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-06-11 01:29:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 01:29:50,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005343266] [2021-06-11 01:29:50,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 01:29:50,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-11 01:29:50,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11115742] [2021-06-11 01:29:50,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-11 01:29:50,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 01:29:50,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-11 01:29:50,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-11 01:29:50,948 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-06-11 01:29:50,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 10 transitions, 35 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:50,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 01:29:50,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-06-11 01:29:50,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 01:29:51,061 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-06-11 01:29:51,061 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-11 01:29:51,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 10 events. 0/10 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 01:29:51,061 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-06-11 01:29:51,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 44 flow [2021-06-11 01:29:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-11 01:29:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-11 01:29:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-11 01:29:51,068 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-06-11 01:29:51,069 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-11 01:29:51,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-11 01:29:51,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 01:29:51,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-11 01:29:51,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:51,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:51,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:51,070 INFO L185 Difference]: Start difference. First operand has 23 places, 10 transitions, 35 flow. Second operand 5 states and 75 transitions. [2021-06-11 01:29:51,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 44 flow [2021-06-11 01:29:51,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-11 01:29:51,071 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-06-11 01:29:51,071 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-06-11 01:29:51,071 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-06-11 01:29:51,071 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-06-11 01:29:51,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 01:29:51,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-11 01:29:51,074 INFO L202 PluginConnector]: Adding new model time-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.06 01:29:51 BasicIcfg [2021-06-11 01:29:51,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-11 01:29:51,075 INFO L168 Benchmark]: Toolchain (without parser) took 3571.60 ms. Allocated memory is still 390.1 MB. Free memory was 369.3 MB in the beginning and 227.6 MB in the end (delta: 141.7 MB). Peak memory consumption was 143.8 MB. Max. memory is 16.0 GB. [2021-06-11 01:29:51,075 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 390.1 MB. Free memory is still 370.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 01:29:51,076 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.53 ms. Allocated memory is still 390.1 MB. Free memory was 369.1 MB in the beginning and 367.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 01:29:51,076 INFO L168 Benchmark]: Boogie Preprocessor took 13.30 ms. Allocated memory is still 390.1 MB. Free memory was 367.8 MB in the beginning and 366.9 MB in the end (delta: 884.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-11 01:29:51,080 INFO L168 Benchmark]: RCFGBuilder took 248.63 ms. Allocated memory is still 390.1 MB. Free memory was 366.8 MB in the beginning and 355.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-11 01:29:51,081 INFO L168 Benchmark]: TraceAbstraction took 3284.18 ms. Allocated memory is still 390.1 MB. Free memory was 354.4 MB in the beginning and 227.6 MB in the end (delta: 126.9 MB). Peak memory consumption was 127.0 MB. Max. memory is 16.0 GB. [2021-06-11 01:29:51,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 390.1 MB. Free memory is still 370.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.53 ms. Allocated memory is still 390.1 MB. Free memory was 369.1 MB in the beginning and 367.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.30 ms. Allocated memory is still 390.1 MB. Free memory was 367.8 MB in the beginning and 366.9 MB in the end (delta: 884.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 248.63 ms. Allocated memory is still 390.1 MB. Free memory was 366.8 MB in the beginning and 355.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3284.18 ms. Allocated memory is still 390.1 MB. Free memory was 354.4 MB in the beginning and 227.6 MB in the end (delta: 126.9 MB). Peak memory consumption was 127.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 261.1ms, 24 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 18 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 18, unknown conditional: 0, unknown unconditional: 18] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 56]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3178.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1066.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 330.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1753.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=3, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.4ms SsaConstructionTime, 112.8ms SatisfiabilityAnalysisTime, 1509.3ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1596 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...