/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 14:41:11,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 14:41:11,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 14:41:11,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 14:41:11,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 14:41:11,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 14:41:11,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 14:41:11,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 14:41:11,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 14:41:11,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 14:41:11,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 14:41:11,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 14:41:11,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 14:41:11,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 14:41:11,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 14:41:11,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 14:41:11,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 14:41:11,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 14:41:11,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 14:41:11,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 14:41:11,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 14:41:11,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 14:41:11,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 14:41:11,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 14:41:11,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 14:41:11,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 14:41:11,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 14:41:11,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 14:41:11,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2021-03-24 14:41:11,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 14:41:11,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 14:41:11,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 14:41:11,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 14:41:11,248 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 14:41:11,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 14:41:11,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 14:41:11,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 14:41:11,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 14:41:11,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 14:41:11,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 14:41:11,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 14:41:11,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 14:41:11,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 14:41:11,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 14:41:11,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 14:41:11,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 14:41:11,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 14:41:11,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 14:41:11,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 14:41:11,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 14:41:11,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 14:41:11,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 14:41:11,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 14:41:11,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 14:41:11,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 14:41:11,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 14:41:11,252 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 14:41:11,252 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 14:41:11,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 14:41:11,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 14:41:11,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 14:41:11,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 14:41:11,556 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 14:41:11,558 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 14:41:11,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl [2021-03-24 14:41:11,563 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl' [2021-03-24 14:41:11,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 14:41:11,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 14:41:11,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 14:41:11,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 14:41:11,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 14:41:11,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 14:41:11,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 14:41:11,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 14:41:11,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 14:41:11,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... [2021-03-24 14:41:11,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 14:41:11,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 14:41:11,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 14:41:11,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 14:41:11,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 14:41:11,734 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 14:41:11,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 14:41:11,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 14:41:11,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 14:41:11,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 14:41:11,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 14:41:11,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 14:41:11,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 14:41:11,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 14:41:11,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 14:41:11,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 14:41:11,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 14:41:11,738 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 14:41:12,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 14:41:12,129 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 14:41:12,130 INFO L202 PluginConnector]: Adding new model collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:41:12 BoogieIcfgContainer [2021-03-24 14:41:12,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 14:41:12,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 14:41:12,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 14:41:12,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 14:41:12,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:11" (1/2) ... [2021-03-24 14:41:12,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfa9a40 and model type collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 02:41:12, skipping insertion in model container [2021-03-24 14:41:12,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:41:12" (2/2) ... [2021-03-24 14:41:12,136 INFO L111 eAbstractionObserver]: Analyzing ICFG collitem-trans.wvr.bpl [2021-03-24 14:41:12,144 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 14:41:12,149 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 14:41:12,150 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 14:41:12,220 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-24 14:41:12,236 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 14:41:12,267 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 14:41:12,267 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 14:41:12,268 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 14:41:12,268 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 14:41:12,268 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 14:41:12,268 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 14:41:12,268 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 14:41:12,268 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 14:41:12,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 14:41:12,306 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 14:41:12,306 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:41:12,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 14:41:12,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 14:41:12,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-24 14:41:12,312 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 14:41:12,320 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 14:41:12,325 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 14:41:12,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-24 14:41:12,339 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 14:41:12,339 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:41:12,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 14 events. 0/14 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 14:41:12,342 INFO L142 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-24 14:41:12,489 INFO L154 LiptonReduction]: Checked pairs total: 18 [2021-03-24 14:41:12,489 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 14:41:12,491 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 180 [2021-03-24 14:41:12,502 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-24 14:41:12,502 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:41:12,502 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:12,503 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:12,503 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1809114803, now seen corresponding path program 1 times [2021-03-24 14:41:12,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:12,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746134233] [2021-03-24 14:41:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:12,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:12,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:13,019 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 114 [2021-03-24 14:41:13,032 INFO L142 QuantifierPusher]: treesize reduction 2787, result has 23.2 percent of original size [2021-03-24 14:41:13,054 INFO L147 QuantifierPusher]: treesize reduction 385, result has 54.4 percent of original size 459 [2021-03-24 14:41:13,307 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 39 [2021-03-24 14:41:13,344 INFO L142 QuantifierPusher]: treesize reduction 1339, result has 34.0 percent of original size [2021-03-24 14:41:13,352 INFO L147 QuantifierPusher]: treesize reduction 55, result has 92.0 percent of original size 635 [2021-03-24 14:41:13,688 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 53 [2021-03-24 14:41:13,696 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:13,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 14:41:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:41:13,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746134233] [2021-03-24 14:41:13,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:13,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:13,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373895366] [2021-03-24 14:41:13,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:13,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:13,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:13,758 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:13,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 38 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:13,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:13,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:13,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:13,997 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-03-24 14:41:14,013 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-03-24 14:41:14,013 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-24 14:41:14,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 29 events. 3/29 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 1 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 42. Up to 7 conditions per place. [2021-03-24 14:41:14,015 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-03-24 14:41:14,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-03-24 14:41:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:41:14,026 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:41:14,027 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:41:14,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:41:14,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:14,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:41:14,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:14,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:14,038 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:14,040 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:41:14,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-03-24 14:41:14,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 14:41:14,048 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-03-24 14:41:14,049 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=11} [2021-03-24 14:41:14,050 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-24 14:41:14,050 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-03-24 14:41:14,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:14,050 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:14,051 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:14,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 14:41:14,051 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash 840283623, now seen corresponding path program 2 times [2021-03-24 14:41:14,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:14,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146229893] [2021-03-24 14:41:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:14,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:14,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:14,416 INFO L142 QuantifierPusher]: treesize reduction 9033, result has 20.9 percent of original size [2021-03-24 14:41:14,443 INFO L147 QuantifierPusher]: treesize reduction 123, result has 94.8 percent of original size 2264 [2021-03-24 14:41:15,021 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 49 [2021-03-24 14:41:15,037 INFO L142 QuantifierPusher]: treesize reduction 825, result has 45.8 percent of original size [2021-03-24 14:41:15,044 INFO L147 QuantifierPusher]: treesize reduction 336, result has 51.7 percent of original size 360 [2021-03-24 14:41:15,206 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2021-03-24 14:41:15,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:15,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 14:41:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:41:15,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146229893] [2021-03-24 14:41:15,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:15,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231603212] [2021-03-24 14:41:15,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:15,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:15,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:15,235 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:15,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 41 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:15,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:15,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:15,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:15,446 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2021-03-24 14:41:15,672 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-03-24 14:41:15,682 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-03-24 14:41:15,682 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-03-24 14:41:15,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 29 events. 2/29 cut-off events. For 24/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2021-03-24 14:41:15,682 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-24 14:41:15,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 85 flow [2021-03-24 14:41:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:41:15,684 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:41:15,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:41:15,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:41:15,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:15,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:41:15,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:15,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:15,686 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:15,686 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:41:15,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 85 flow [2021-03-24 14:41:15,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-24 14:41:15,688 INFO L241 Difference]: Finished difference. Result has 25 places, 11 transitions, 51 flow [2021-03-24 14:41:15,688 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=51, PETRI_PLACES=25, PETRI_TRANSITIONS=11} [2021-03-24 14:41:15,689 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-03-24 14:41:15,689 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 11 transitions, 51 flow [2021-03-24 14:41:15,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:15,689 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:15,689 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:15,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 14:41:15,689 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash -31273989, now seen corresponding path program 3 times [2021-03-24 14:41:15,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:15,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029140830] [2021-03-24 14:41:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:15,759 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:15,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:15,772 INFO L142 QuantifierPusher]: treesize reduction 1977, result has 27.9 percent of original size [2021-03-24 14:41:15,777 INFO L147 QuantifierPusher]: treesize reduction 166, result has 78.3 percent of original size 598 [2021-03-24 14:41:15,946 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 33 [2021-03-24 14:41:16,039 INFO L142 QuantifierPusher]: treesize reduction 18199, result has 7.9 percent of original size [2021-03-24 14:41:16,055 INFO L147 QuantifierPusher]: treesize reduction 336, result has 78.5 percent of original size 1227 [2021-03-24 14:41:16,419 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 45 [2021-03-24 14:41:16,426 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:16,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 14:41:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:41:16,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029140830] [2021-03-24 14:41:16,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:16,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:16,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756667401] [2021-03-24 14:41:16,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:16,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:16,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:16,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:16,456 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:16,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 11 transitions, 51 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:16,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:16,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:16,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:16,615 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-03-24 14:41:16,615 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-24 14:41:16,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 23 events. 1/23 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-03-24 14:41:16,616 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-03-24 14:41:16,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 93 flow [2021-03-24 14:41:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:41:16,619 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:41:16,619 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:41:16,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:41:16,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:16,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:41:16,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:16,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:16,621 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:16,621 INFO L185 Difference]: Start difference. First operand has 25 places, 11 transitions, 51 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:41:16,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 93 flow [2021-03-24 14:41:16,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 74 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-24 14:41:16,623 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-03-24 14:41:16,623 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=12} [2021-03-24 14:41:16,623 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-03-24 14:41:16,623 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 12 transitions, 62 flow [2021-03-24 14:41:16,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:16,624 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:16,624 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:16,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 14:41:16,624 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:16,625 INFO L82 PathProgramCache]: Analyzing trace with hash -15909717, now seen corresponding path program 4 times [2021-03-24 14:41:16,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:16,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671098880] [2021-03-24 14:41:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:16,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:16,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:16,733 INFO L142 QuantifierPusher]: treesize reduction 28376, result has 3.6 percent of original size [2021-03-24 14:41:16,740 INFO L147 QuantifierPusher]: treesize reduction 140, result has 86.7 percent of original size 913 [2021-03-24 14:41:16,909 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 35 [2021-03-24 14:41:16,919 INFO L142 QuantifierPusher]: treesize reduction 979, result has 29.2 percent of original size [2021-03-24 14:41:16,922 INFO L147 QuantifierPusher]: treesize reduction 268, result has 33.5 percent of original size 135 [2021-03-24 14:41:17,044 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-03-24 14:41:17,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:17,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 14:41:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:41:17,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671098880] [2021-03-24 14:41:17,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:17,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:17,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022224207] [2021-03-24 14:41:17,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:17,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:17,067 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:17,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 12 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:17,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:17,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:17,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:17,216 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-24 14:41:17,217 INFO L130 PetriNetUnfolder]: For 34/37 co-relation queries the response was YES. [2021-03-24 14:41:17,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 20 events. 1/20 cut-off events. For 34/37 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 1 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2021-03-24 14:41:17,217 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 4/14 dead transitions. [2021-03-24 14:41:17,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 92 flow [2021-03-24 14:41:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-03-24 14:41:17,219 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2021-03-24 14:41:17,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-03-24 14:41:17,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-03-24 14:41:17,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:17,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-03-24 14:41:17,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:17,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:17,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:17,221 INFO L185 Difference]: Start difference. First operand has 27 places, 12 transitions, 62 flow. Second operand 5 states and 78 transitions. [2021-03-24 14:41:17,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 92 flow [2021-03-24 14:41:17,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 14 transitions, 88 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 14:41:17,222 INFO L241 Difference]: Finished difference. Result has 30 places, 10 transitions, 49 flow [2021-03-24 14:41:17,223 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=30, PETRI_TRANSITIONS=10} [2021-03-24 14:41:17,223 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-03-24 14:41:17,223 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 10 transitions, 49 flow [2021-03-24 14:41:17,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:17,223 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:17,223 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:17,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 14:41:17,223 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash 815259183, now seen corresponding path program 5 times [2021-03-24 14:41:17,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:17,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999216983] [2021-03-24 14:41:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:17,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:17,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:17,379 INFO L142 QuantifierPusher]: treesize reduction 9632, result has 18.3 percent of original size [2021-03-24 14:41:17,392 INFO L147 QuantifierPusher]: treesize reduction 312, result has 85.6 percent of original size 1848 [2021-03-24 14:41:17,857 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 50 [2021-03-24 14:41:17,873 INFO L142 QuantifierPusher]: treesize reduction 1376, result has 40.8 percent of original size [2021-03-24 14:41:17,879 INFO L147 QuantifierPusher]: treesize reduction 184, result has 80.6 percent of original size 766 [2021-03-24 14:41:18,174 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 56 [2021-03-24 14:41:18,180 INFO L142 QuantifierPusher]: treesize reduction 16, result has 59.0 percent of original size [2021-03-24 14:41:18,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 14:41:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:41:18,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999216983] [2021-03-24 14:41:18,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:18,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:18,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034538853] [2021-03-24 14:41:18,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:18,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:18,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:18,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:18,199 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:18,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 10 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:18,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:18,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:18,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:18,472 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-03-24 14:41:18,756 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2021-03-24 14:41:18,765 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 14:41:18,765 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 14:41:18,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 16 events. 0/16 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 14:41:18,765 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 2/12 dead transitions. [2021-03-24 14:41:18,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 80 flow [2021-03-24 14:41:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-24 14:41:18,777 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-03-24 14:41:18,777 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-24 14:41:18,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-24 14:41:18,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:18,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-24 14:41:18,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:18,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:18,778 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:18,778 INFO L185 Difference]: Start difference. First operand has 30 places, 10 transitions, 49 flow. Second operand 5 states and 77 transitions. [2021-03-24 14:41:18,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 80 flow [2021-03-24 14:41:18,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 47 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-03-24 14:41:18,780 INFO L241 Difference]: Finished difference. Result has 23 places, 10 transitions, 35 flow [2021-03-24 14:41:18,780 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=35, PETRI_PLACES=23, PETRI_TRANSITIONS=10} [2021-03-24 14:41:18,780 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-03-24 14:41:18,780 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 10 transitions, 35 flow [2021-03-24 14:41:18,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:18,780 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:18,780 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:18,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 14:41:18,781 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash -902489877, now seen corresponding path program 6 times [2021-03-24 14:41:18,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:18,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500353738] [2021-03-24 14:41:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:18,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:18,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:18,917 INFO L142 QuantifierPusher]: treesize reduction 26263, result has 10.8 percent of original size [2021-03-24 14:41:18,927 INFO L147 QuantifierPusher]: treesize reduction 2159, result has 31.8 percent of original size 1007 [2021-03-24 14:41:19,174 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 37 [2021-03-24 14:41:19,181 INFO L142 QuantifierPusher]: treesize reduction 1093, result has 20.9 percent of original size [2021-03-24 14:41:19,183 INFO L147 QuantifierPusher]: treesize reduction 144, result has 50.2 percent of original size 145 [2021-03-24 14:41:19,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:19,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 14:41:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:41:19,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500353738] [2021-03-24 14:41:19,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:19,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:19,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969554971] [2021-03-24 14:41:19,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:19,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:19,285 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:19,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 10 transitions, 35 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:19,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:19,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:19,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:19,414 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 14:41:19,415 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-24 14:41:19,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 10 events. 0/10 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 14:41:19,415 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-24 14:41:19,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 44 flow [2021-03-24 14:41:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-24 14:41:19,416 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-03-24 14:41:19,416 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-24 14:41:19,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-24 14:41:19,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:19,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-24 14:41:19,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:19,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:19,417 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:19,417 INFO L185 Difference]: Start difference. First operand has 23 places, 10 transitions, 35 flow. Second operand 5 states and 75 transitions. [2021-03-24 14:41:19,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 44 flow [2021-03-24 14:41:19,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 14:41:19,418 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-24 14:41:19,418 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-03-24 14:41:19,418 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-24 14:41:19,418 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-24 14:41:19,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:19,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 14:41:19,422 INFO L202 PluginConnector]: Adding new model collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 02:41:19 BasicIcfg [2021-03-24 14:41:19,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 14:41:19,423 INFO L168 Benchmark]: Toolchain (without parser) took 7810.34 ms. Allocated memory was 255.9 MB in the beginning and 608.2 MB in the end (delta: 352.3 MB). Free memory was 236.9 MB in the beginning and 577.0 MB in the end (delta: -340.1 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.0 GB. [2021-03-24 14:41:19,423 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.89 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 14:41:19,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 14:41:19,424 INFO L168 Benchmark]: Boogie Preprocessor took 20.29 ms. Allocated memory is still 255.9 MB. Free memory was 235.4 MB in the beginning and 234.4 MB in the end (delta: 976.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 14:41:19,424 INFO L168 Benchmark]: RCFGBuilder took 468.73 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 229.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.0 GB. [2021-03-24 14:41:19,425 INFO L168 Benchmark]: TraceAbstraction took 7290.20 ms. Allocated memory was 255.9 MB in the beginning and 608.2 MB in the end (delta: 352.3 MB). Free memory was 229.2 MB in the beginning and 577.0 MB in the end (delta: -347.8 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.0 GB. [2021-03-24 14:41:19,427 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 0.89 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.29 ms. Allocated memory is still 255.9 MB. Free memory was 235.4 MB in the beginning and 234.4 MB in the end (delta: 976.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 468.73 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 229.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 7290.20 ms. Allocated memory was 255.9 MB in the beginning and 608.2 MB in the end (delta: 352.3 MB). Free memory was 229.2 MB in the beginning and 577.0 MB in the end (delta: -347.8 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 164.6ms, 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: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 18, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 15, unknown conditional: 0, unknown unconditional: 15] , 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: 5.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 7155.3ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1794.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 228.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 124.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4842.1ms 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: 12.3ms SsaConstructionTime, 212.3ms SatisfiabilityAnalysisTime, 4775.7ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1801 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...