/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-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 19:01:27,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 19:01:27,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 19:01:28,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 19:01:28,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 19:01:28,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 19:01:28,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 19:01:28,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 19:01:28,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 19:01:28,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 19:01:28,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 19:01:28,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 19:01:28,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 19:01:28,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 19:01:28,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 19:01:28,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 19:01:28,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 19:01:28,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 19:01:28,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 19:01:28,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 19:01:28,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 19:01:28,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 19:01:28,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 19:01:28,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 19:01:28,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 19:01:28,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 19:01:28,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 19:01:28,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 19:01:28,029 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-RepeatedSemanticLbe.epf [2021-03-25 19:01:28,046 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 19:01:28,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 19:01:28,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 19:01:28,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 19:01:28,048 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 19:01:28,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 19:01:28,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 19:01:28,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 19:01:28,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 19:01:28,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 19:01:28,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 19:01:28,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 19:01:28,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 19:01:28,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 19:01:28,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 19:01:28,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 19:01:28,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 19:01:28,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 19:01:28,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 19:01:28,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 19:01:28,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 19:01:28,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 19:01:28,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 19:01:28,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 19:01:28,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 19:01:28,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 19:01:28,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 19:01:28,051 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 19:01:28,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 19:01:28,051 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 19:01:28,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 19:01:28,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 19:01:28,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 19:01:28,280 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 19:01:28,281 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 19:01:28,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-trans.wvr.bpl [2021-03-25 19:01:28,282 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-trans.wvr.bpl' [2021-03-25 19:01:28,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 19:01:28,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 19:01:28,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 19:01:28,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 19:01:28,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 19:01:28,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 19:01:28,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 19:01:28,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 19:01:28,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 19:01:28,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/1) ... [2021-03-25 19:01:28,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 19:01:28,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 19:01:28,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 19:01:28,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 19:01:28,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (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 [2021-03-25 19:01:28,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-25 19:01:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-25 19:01:28,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-25 19:01:28,403 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-25 19:01:28,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-25 19:01:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-25 19:01:28,403 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 19:01:28,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 19:01:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 19:01:28,403 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-25 19:01:28,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-25 19:01:28,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-25 19:01:28,405 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 19:01:28,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 19:01:28,592 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 19:01:28,593 INFO L202 PluginConnector]: Adding new model container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:01:28 BoogieIcfgContainer [2021-03-25 19:01:28,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 19:01:28,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 19:01:28,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 19:01:28,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 19:01:28,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:01:28" (1/2) ... [2021-03-25 19:01:28,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3518a33f and model type container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:01:28, skipping insertion in model container [2021-03-25 19:01:28,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:01:28" (2/2) ... [2021-03-25 19:01:28,598 INFO L111 eAbstractionObserver]: Analyzing ICFG container-trans.wvr.bpl [2021-03-25 19:01:28,601 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 19:01:28,620 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 19:01:28,621 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 19:01:28,658 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-25 19:01:28,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-25 19:01:28,712 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 19:01:28,712 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 19:01:28,712 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 19:01:28,712 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 19:01:28,713 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 19:01:28,713 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 19:01:28,713 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 19:01:28,713 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 19:01:28,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-25 19:01:28,739 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-25 19:01:28,740 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 19:01:28,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 19:01:28,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-25 19:01:28,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-25 19:01:28,744 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 19:01:28,761 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-25 19:01:28,768 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-25 19:01:28,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-25 19:01:28,780 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-25 19:01:28,780 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 19:01:28,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 14 events. 0/14 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 19:01:28,782 INFO L142 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-25 19:01:28,869 INFO L154 LiptonReduction]: Checked pairs total: 18 [2021-03-25 19:01:28,870 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-25 19:01:28,871 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 127 [2021-03-25 19:01:28,892 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-25 19:01:28,892 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 19:01:28,892 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 19:01:28,893 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 19:01:28,893 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 19:01:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 19:01:28,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1809114803, now seen corresponding path program 1 times [2021-03-25 19:01:28,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 19:01:28,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371639226] [2021-03-25 19:01:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 19:01:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 19:01:29,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:29,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 19:01:29,336 INFO L142 QuantifierPusher]: treesize reduction 2652, result has 27.0 percent of original size [2021-03-25 19:01:29,351 INFO L147 QuantifierPusher]: treesize reduction 477, result has 51.5 percent of original size 506 [2021-03-25 19:01:29,532 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2021-03-25 19:01:29,559 INFO L142 QuantifierPusher]: treesize reduction 1323, result has 34.8 percent of original size [2021-03-25 19:01:29,565 INFO L147 QuantifierPusher]: treesize reduction 160, result has 77.3 percent of original size 546 [2021-03-25 19:01:29,748 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 50 [2021-03-25 19:01:29,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:29,750 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-25 19:01:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 19:01:29,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371639226] [2021-03-25 19:01:29,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 19:01:29,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 19:01:29,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822462821] [2021-03-25 19:01:29,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 19:01:29,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 19:01:29,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 19:01:29,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 19:01:29,791 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-25 19:01:29,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 38 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:29,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 19:01:29,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-25 19:01:29,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 19:01:30,002 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-25 19:01:30,017 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-03-25 19:01:30,017 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-25 19:01:30,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 29 events. 3/29 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 1 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 42. Up to 7 conditions per place. [2021-03-25 19:01:30,019 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-03-25 19:01:30,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-03-25 19:01:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 19:01:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 19:01:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-25 19:01:30,028 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-25 19:01:30,028 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-25 19:01:30,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-25 19:01:30,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 19:01:30,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-25 19:01:30,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:30,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:30,040 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:30,041 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-03-25 19:01:30,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-03-25 19:01:30,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-25 19:01:30,049 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-03-25 19:01:30,050 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=11} [2021-03-25 19:01:30,051 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-25 19:01:30,051 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 19:01:30,051 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 11 transitions, 41 flow [2021-03-25 19:01:30,052 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 11 transitions, 41 flow [2021-03-25 19:01:30,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 11 transitions, 41 flow [2021-03-25 19:01:30,059 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2021-03-25 19:01:30,059 INFO L130 PetriNetUnfolder]: For 4/5 co-relation queries the response was YES. [2021-03-25 19:01:30,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 19 events. 0/19 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 19:01:30,060 INFO L142 LiptonReduction]: Number of co-enabled transitions 18 [2021-03-25 19:01:30,062 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 19:01:30,062 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 19:01:30,062 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 11 [2021-03-25 19:01:30,064 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 41 flow [2021-03-25 19:01:30,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:30,064 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 19:01:30,064 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 19:01:30,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 19:01:30,065 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 19:01:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 19:01:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash 840283623, now seen corresponding path program 2 times [2021-03-25 19:01:30,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 19:01:30,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406265025] [2021-03-25 19:01:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 19:01:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 19:01:30,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:30,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 19:01:30,304 INFO L142 QuantifierPusher]: treesize reduction 9309, result has 18.5 percent of original size [2021-03-25 19:01:30,317 INFO L147 QuantifierPusher]: treesize reduction 210, result has 90.1 percent of original size 1903 [2021-03-25 19:01:30,680 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 42 [2021-03-25 19:01:30,690 INFO L142 QuantifierPusher]: treesize reduction 1153, result has 24.2 percent of original size [2021-03-25 19:01:30,696 INFO L147 QuantifierPusher]: treesize reduction 8, result has 97.8 percent of original size 360 [2021-03-25 19:01:30,811 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 55 [2021-03-25 19:01:30,815 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:30,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-25 19:01:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 19:01:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406265025] [2021-03-25 19:01:30,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 19:01:30,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 19:01:30,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546008688] [2021-03-25 19:01:30,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 19:01:30,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 19:01:30,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 19:01:30,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 19:01:30,839 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-25 19:01:30,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 41 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:30,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 19:01:30,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-25 19:01:30,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 19:01:31,013 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-03-25 19:01:31,014 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-03-25 19:01:31,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 29 events. 2/29 cut-off events. For 24/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2021-03-25 19:01:31,019 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-25 19:01:31,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 85 flow [2021-03-25 19:01:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 19:01:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 19:01:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-25 19:01:31,021 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-25 19:01:31,021 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-25 19:01:31,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-25 19:01:31,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 19:01:31,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-25 19:01:31,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,023 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,023 INFO L185 Difference]: Start difference. First operand has 20 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-03-25 19:01:31,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 85 flow [2021-03-25 19:01:31,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-25 19:01:31,024 INFO L241 Difference]: Finished difference. Result has 25 places, 11 transitions, 51 flow [2021-03-25 19:01:31,024 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=51, PETRI_PLACES=25, PETRI_TRANSITIONS=11} [2021-03-25 19:01:31,025 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-03-25 19:01:31,025 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 19:01:31,025 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 25 places, 11 transitions, 51 flow [2021-03-25 19:01:31,025 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 25 places, 11 transitions, 51 flow [2021-03-25 19:01:31,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 11 transitions, 51 flow [2021-03-25 19:01:31,028 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-25 19:01:31,028 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2021-03-25 19:01:31,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 17 events. 0/17 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 24 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 19:01:31,029 INFO L142 LiptonReduction]: Number of co-enabled transitions 14 [2021-03-25 19:01:31,029 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 19:01:31,029 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 19:01:31,029 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 19:01:31,030 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 11 transitions, 51 flow [2021-03-25 19:01:31,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,030 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 19:01:31,030 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 19:01:31,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 19:01:31,030 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 19:01:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 19:01:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash -31273989, now seen corresponding path program 3 times [2021-03-25 19:01:31,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 19:01:31,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300357076] [2021-03-25 19:01:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 19:01:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 19:01:31,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:31,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 19:01:31,103 INFO L142 QuantifierPusher]: treesize reduction 2087, result has 23.9 percent of original size [2021-03-25 19:01:31,106 INFO L147 QuantifierPusher]: treesize reduction 87, result has 86.7 percent of original size 567 [2021-03-25 19:01:31,219 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 33 [2021-03-25 19:01:31,290 INFO L142 QuantifierPusher]: treesize reduction 17130, result has 13.3 percent of original size [2021-03-25 19:01:31,303 INFO L147 QuantifierPusher]: treesize reduction 1126, result has 57.2 percent of original size 1506 [2021-03-25 19:01:31,598 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 44 [2021-03-25 19:01:31,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:31,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-25 19:01:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 19:01:31,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300357076] [2021-03-25 19:01:31,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 19:01:31,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 19:01:31,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799307367] [2021-03-25 19:01:31,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 19:01:31,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 19:01:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 19:01:31,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 19:01:31,618 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-25 19:01:31,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 11 transitions, 51 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 19:01:31,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-25 19:01:31,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 19:01:31,782 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-03-25 19:01:31,782 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-25 19:01:31,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 23 events. 1/23 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-03-25 19:01:31,782 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-03-25 19:01:31,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 93 flow [2021-03-25 19:01:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 19:01:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 19:01:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-25 19:01:31,783 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-25 19:01:31,784 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-25 19:01:31,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-25 19:01:31,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 19:01:31,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-25 19:01:31,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,785 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,785 INFO L185 Difference]: Start difference. First operand has 24 places, 11 transitions, 51 flow. Second operand 5 states and 79 transitions. [2021-03-25 19:01:31,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 93 flow [2021-03-25 19:01:31,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 74 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-25 19:01:31,786 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-03-25 19:01:31,787 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=12} [2021-03-25 19:01:31,787 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-03-25 19:01:31,787 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 19:01:31,787 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 12 transitions, 62 flow [2021-03-25 19:01:31,787 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 12 transitions, 62 flow [2021-03-25 19:01:31,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 12 transitions, 62 flow [2021-03-25 19:01:31,790 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2021-03-25 19:01:31,790 INFO L130 PetriNetUnfolder]: For 23/24 co-relation queries the response was YES. [2021-03-25 19:01:31,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 19 events. 0/19 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 19:01:31,791 INFO L142 LiptonReduction]: Number of co-enabled transitions 14 [2021-03-25 19:01:31,791 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 19:01:31,791 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 19:01:31,791 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 19:01:31,792 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 12 transitions, 62 flow [2021-03-25 19:01:31,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:31,792 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 19:01:31,792 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 19:01:31,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 19:01:31,793 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 19:01:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 19:01:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash -15909717, now seen corresponding path program 4 times [2021-03-25 19:01:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 19:01:31,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569404064] [2021-03-25 19:01:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 19:01:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 19:01:31,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:31,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 19:01:31,877 INFO L142 QuantifierPusher]: treesize reduction 28251, result has 4.0 percent of original size [2021-03-25 19:01:31,881 INFO L147 QuantifierPusher]: treesize reduction 268, result has 77.2 percent of original size 910 [2021-03-25 19:01:32,077 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2021-03-25 19:01:32,097 INFO L142 QuantifierPusher]: treesize reduction 1157, result has 16.3 percent of original size [2021-03-25 19:01:32,098 INFO L147 QuantifierPusher]: treesize reduction 95, result has 57.8 percent of original size 130 [2021-03-25 19:01:32,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:32,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-25 19:01:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 19:01:32,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569404064] [2021-03-25 19:01:32,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 19:01:32,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 19:01:32,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49890269] [2021-03-25 19:01:32,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 19:01:32,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 19:01:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 19:01:32,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 19:01:32,199 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-25 19:01:32,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 12 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:32,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 19:01:32,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-25 19:01:32,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 19:01:32,338 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-25 19:01:32,339 INFO L130 PetriNetUnfolder]: For 34/37 co-relation queries the response was YES. [2021-03-25 19:01:32,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 20 events. 1/20 cut-off events. For 34/37 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 1 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2021-03-25 19:01:32,339 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 4/14 dead transitions. [2021-03-25 19:01:32,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 92 flow [2021-03-25 19:01:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 19:01:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 19:01:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-03-25 19:01:32,341 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2021-03-25 19:01:32,341 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-03-25 19:01:32,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-03-25 19:01:32,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 19:01:32,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-03-25 19:01:32,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:32,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:32,343 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:32,343 INFO L185 Difference]: Start difference. First operand has 26 places, 12 transitions, 62 flow. Second operand 5 states and 78 transitions. [2021-03-25 19:01:32,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 92 flow [2021-03-25 19:01:32,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 14 transitions, 88 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-25 19:01:32,345 INFO L241 Difference]: Finished difference. Result has 30 places, 10 transitions, 49 flow [2021-03-25 19:01:32,345 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=30, PETRI_TRANSITIONS=10} [2021-03-25 19:01:32,345 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-03-25 19:01:32,345 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 19:01:32,346 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 10 transitions, 49 flow [2021-03-25 19:01:32,346 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 10 transitions, 49 flow [2021-03-25 19:01:32,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 10 transitions, 49 flow [2021-03-25 19:01:32,348 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 19:01:32,348 INFO L130 PetriNetUnfolder]: For 14/15 co-relation queries the response was YES. [2021-03-25 19:01:32,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 10 events. 0/10 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 19:01:32,348 INFO L142 LiptonReduction]: Number of co-enabled transitions 4 [2021-03-25 19:01:32,349 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 19:01:32,349 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 19:01:32,349 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 19:01:32,349 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 10 transitions, 49 flow [2021-03-25 19:01:32,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:32,349 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 19:01:32,349 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 19:01:32,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-25 19:01:32,350 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 19:01:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 19:01:32,350 INFO L82 PathProgramCache]: Analyzing trace with hash 815259183, now seen corresponding path program 5 times [2021-03-25 19:01:32,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 19:01:32,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994810840] [2021-03-25 19:01:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 19:01:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 19:01:32,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:32,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 19:01:32,439 INFO L142 QuantifierPusher]: treesize reduction 9869, result has 16.3 percent of original size [2021-03-25 19:01:32,447 INFO L147 QuantifierPusher]: treesize reduction 292, result has 84.8 percent of original size 1635 [2021-03-25 19:01:32,816 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 55 [2021-03-25 19:01:32,839 INFO L142 QuantifierPusher]: treesize reduction 1255, result has 46.0 percent of original size [2021-03-25 19:01:32,843 INFO L147 QuantifierPusher]: treesize reduction 205, result has 80.9 percent of original size 866 [2021-03-25 19:01:32,994 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2021-03-25 19:01:32,995 INFO L142 QuantifierPusher]: treesize reduction 16, result has 59.0 percent of original size [2021-03-25 19:01:32,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-25 19:01:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 19:01:33,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994810840] [2021-03-25 19:01:33,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 19:01:33,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 19:01:33,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337496785] [2021-03-25 19:01:33,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 19:01:33,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 19:01:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 19:01:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 19:01:33,014 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-25 19:01:33,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 10 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:33,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 19:01:33,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-25 19:01:33,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 19:01:33,262 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2021-03-25 19:01:33,512 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-03-25 19:01:33,523 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-25 19:01:33,523 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-25 19:01:33,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 16 events. 0/16 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 19:01:33,524 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 2/12 dead transitions. [2021-03-25 19:01:33,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 80 flow [2021-03-25 19:01:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 19:01:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 19:01:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-25 19:01:33,525 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-03-25 19:01:33,525 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-25 19:01:33,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-25 19:01:33,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 19:01:33,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-25 19:01:33,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:33,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:33,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:33,526 INFO L185 Difference]: Start difference. First operand has 27 places, 10 transitions, 49 flow. Second operand 5 states and 77 transitions. [2021-03-25 19:01:33,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 80 flow [2021-03-25 19:01:33,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 47 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-03-25 19:01:33,527 INFO L241 Difference]: Finished difference. Result has 23 places, 10 transitions, 35 flow [2021-03-25 19:01:33,527 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=35, PETRI_PLACES=23, PETRI_TRANSITIONS=10} [2021-03-25 19:01:33,527 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-03-25 19:01:33,527 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 19:01:33,527 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 10 transitions, 35 flow [2021-03-25 19:01:33,528 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 10 transitions, 35 flow [2021-03-25 19:01:33,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 10 transitions, 35 flow [2021-03-25 19:01:33,530 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 19:01:33,530 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 19:01:33,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 0/11 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 19:01:33,530 INFO L142 LiptonReduction]: Number of co-enabled transitions 2 [2021-03-25 19:01:33,531 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 19:01:33,531 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 19:01:33,531 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 19:01:33,531 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 10 transitions, 35 flow [2021-03-25 19:01:33,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:33,532 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 19:01:33,532 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 19:01:33,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 19:01:33,532 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 19:01:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 19:01:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash -902489877, now seen corresponding path program 6 times [2021-03-25 19:01:33,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 19:01:33,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891657194] [2021-03-25 19:01:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 19:01:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 19:01:33,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:33,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 19:01:33,612 INFO L142 QuantifierPusher]: treesize reduction 26229, result has 10.9 percent of original size [2021-03-25 19:01:33,618 INFO L147 QuantifierPusher]: treesize reduction 2229, result has 30.4 percent of original size 973 [2021-03-25 19:01:33,837 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 38 [2021-03-25 19:01:33,844 INFO L142 QuantifierPusher]: treesize reduction 1150, result has 16.8 percent of original size [2021-03-25 19:01:33,845 INFO L147 QuantifierPusher]: treesize reduction 87, result has 62.5 percent of original size 145 [2021-03-25 19:01:33,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 19:01:33,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-25 19:01:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 19:01:33,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891657194] [2021-03-25 19:01:33,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 19:01:33,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 19:01:33,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455853042] [2021-03-25 19:01:33,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 19:01:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 19:01:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 19:01:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 19:01:33,958 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-25 19:01:33,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 10 transitions, 35 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:33,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 19:01:33,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-25 19:01:33,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 19:01:34,088 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 19:01:34,088 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-25 19:01:34,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 10 events. 0/10 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 19:01:34,089 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-25 19:01:34,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 44 flow [2021-03-25 19:01:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 19:01:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 19:01:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-25 19:01:34,089 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-03-25 19:01:34,089 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-25 19:01:34,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-25 19:01:34,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 19:01:34,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-25 19:01:34,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:34,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:34,090 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:34,090 INFO L185 Difference]: Start difference. First operand has 21 places, 10 transitions, 35 flow. Second operand 5 states and 75 transitions. [2021-03-25 19:01:34,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 44 flow [2021-03-25 19:01:34,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-25 19:01:34,091 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-25 19:01:34,091 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-03-25 19:01:34,091 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-25 19:01:34,091 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 19:01:34,091 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 22 places, 0 transitions, 0 flow [2021-03-25 19:01:34,091 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 22 places, 0 transitions, 0 flow [2021-03-25 19:01:34,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 19:01:34,091 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 19:01:34,091 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 19:01:34,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 19:01:34,092 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 19:01:34,092 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 19:01:34,092 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 19:01:34,092 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1 [2021-03-25 19:01:34,092 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 19:01:34,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 19:01:34,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-25 19:01:34,095 INFO L202 PluginConnector]: Adding new model container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 07:01:34 BasicIcfg [2021-03-25 19:01:34,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 19:01:34,096 INFO L168 Benchmark]: Toolchain (without parser) took 5775.97 ms. Allocated memory was 255.9 MB in the beginning and 539.0 MB in the end (delta: 283.1 MB). Free memory was 236.6 MB in the beginning and 253.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 267.3 MB. Max. memory is 16.0 GB. [2021-03-25 19:01:34,096 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 19:01:34,096 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 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. [2021-03-25 19:01:34,097 INFO L168 Benchmark]: Boogie Preprocessor took 14.53 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 19:01:34,097 INFO L168 Benchmark]: RCFGBuilder took 239.84 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 233.2 MB in the end (delta: 821.2 kB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. [2021-03-25 19:01:34,097 INFO L168 Benchmark]: TraceAbstraction took 5500.96 ms. Allocated memory was 255.9 MB in the beginning and 539.0 MB in the end (delta: 283.1 MB). Free memory was 232.4 MB in the beginning and 253.8 MB in the end (delta: -21.4 MB). Peak memory consumption was 261.3 MB. Max. memory is 16.0 GB. [2021-03-25 19:01:34,104 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 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 14.53 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 239.84 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 233.2 MB in the end (delta: 821.2 kB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 5500.96 ms. Allocated memory was 255.9 MB in the beginning and 539.0 MB in the end (delta: 283.1 MB). Free memory was 232.4 MB in the beginning and 253.8 MB in the end (delta: -21.4 MB). Peak memory consumption was 261.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 101.3ms, 24 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 18 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 18, unknown conditional: 0, unknown unconditional: 18] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.1ms, 21 PlacesBefore, 20 PlacesAfterwards, 11 TransitionsBefore, 11 TransitionsAfterwards, 18 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8ms, 25 PlacesBefore, 24 PlacesAfterwards, 11 TransitionsBefore, 11 TransitionsAfterwards, 14 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1ms, 27 PlacesBefore, 26 PlacesAfterwards, 12 TransitionsBefore, 12 TransitionsAfterwards, 14 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8ms, 30 PlacesBefore, 27 PlacesAfterwards, 10 TransitionsBefore, 10 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0ms, 23 PlacesBefore, 21 PlacesAfterwards, 10 TransitionsBefore, 10 TransitionsAfterwards, 2 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.4ms, 22 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 68]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 5383.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1415.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 175.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 124.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3622.4ms 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: 12.0ms SsaConstructionTime, 192.9ms SatisfiabilityAnalysisTime, 3436.8ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1815 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...