/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 23:48:24,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 23:48:24,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 23:48:24,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 23:48:24,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 23:48:24,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 23:48:24,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 23:48:24,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 23:48:24,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 23:48:24,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 23:48:24,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 23:48:24,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 23:48:24,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 23:48:24,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 23:48:24,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 23:48:24,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 23:48:24,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 23:48:24,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 23:48:24,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 23:48:24,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 23:48:24,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 23:48:24,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 23:48:24,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 23:48:24,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 23:48:24,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 23:48:24,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 23:48:24,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 23:48:24,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 23:48:24,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 23:48:24,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 23:48:24,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 23:48:24,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 23:48:24,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 23:48:24,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 23:48:24,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 23:48:24,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 23:48:24,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 23:48:24,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 23:48:24,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 23:48:24,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 23:48:24,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 23:48:24,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-11 23:48:24,879 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 23:48:24,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 23:48:24,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 23:48:24,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 23:48:24,880 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 23:48:24,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 23:48:24,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 23:48:24,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 23:48:24,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 23:48:24,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 23:48:24,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 23:48:24,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 23:48:24,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 23:48:24,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 23:48:24,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 23:48:24,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 23:48:24,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 23:48:24,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 23:48:24,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 23:48:24,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 23:48:24,883 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 23:48:25,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 23:48:25,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 23:48:25,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 23:48:25,099 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 23:48:25,100 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 23:48:25,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl [2021-03-11 23:48:25,101 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl' [2021-03-11 23:48:25,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 23:48:25,226 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 23:48:25,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 23:48:25,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 23:48:25,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 23:48:25,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 23:48:25,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 23:48:25,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 23:48:25,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 23:48:25,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/1) ... [2021-03-11 23:48:25,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 23:48:25,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 23:48:25,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 23:48:25,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 23:48:25,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (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 [2021-03-11 23:48:25,332 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 23:48:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 23:48:25,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 23:48:25,332 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 23:48:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 23:48:25,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 23:48:25,332 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 23:48:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 23:48:25,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 23:48:25,333 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 23:48:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 23:48:25,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 23:48:25,333 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 23:48:25,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 23:48:25,539 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 23:48:25,540 INFO L202 PluginConnector]: Adding new model container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 11:48:25 BoogieIcfgContainer [2021-03-11 23:48:25,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 23:48:25,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 23:48:25,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 23:48:25,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 23:48:25,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:48:25" (1/2) ... [2021-03-11 23:48:25,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cea4a06 and model type container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 11:48:25, skipping insertion in model container [2021-03-11 23:48:25,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 11:48:25" (2/2) ... [2021-03-11 23:48:25,545 INFO L111 eAbstractionObserver]: Analyzing ICFG container-subst.wvr.bpl [2021-03-11 23:48:25,548 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 23:48:25,550 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 23:48:25,551 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 23:48:25,575 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 23:48:25,586 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 23:48:25,599 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 23:48:25,599 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 23:48:25,599 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 23:48:25,599 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 23:48:25,599 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 23:48:25,600 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 23:48:25,600 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 23:48:25,600 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 23:48:25,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 23:48:25,620 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 23:48:25,620 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 23:48:25,621 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. [2021-03-11 23:48:25,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 23:48:25,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-11 23:48:25,625 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 23:48:25,632 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-11 23:48:25,634 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-11 23:48:25,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-11 23:48:25,640 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 23:48:25,641 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 23:48:25,641 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. [2021-03-11 23:48:25,642 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-11 23:48:25,880 INFO L131 LiptonReduction]: Checked pairs total: 42 [2021-03-11 23:48:25,880 INFO L133 LiptonReduction]: Total number of compositions: 4 [2021-03-11 23:48:25,881 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 258 [2021-03-11 23:48:25,898 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 23:48:25,898 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 23:48:25,898 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:48:25,899 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:48:25,899 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:48:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:48:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1809114803, now seen corresponding path program 1 times [2021-03-11 23:48:25,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:48:25,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139415907] [2021-03-11 23:48:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:48:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:48:26,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:48:26,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:48:26,388 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 201 [2021-03-11 23:48:26,390 INFO L142 QuantifierPusher]: treesize reduction 12262, result has 19.3 percent of original size [2021-03-11 23:48:26,406 INFO L147 QuantifierPusher]: treesize reduction 1279, result has 56.3 percent of original size 1645 [2021-03-11 23:48:26,788 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 48 [2021-03-11 23:48:26,811 INFO L142 QuantifierPusher]: treesize reduction 2822, result has 22.2 percent of original size [2021-03-11 23:48:26,819 INFO L147 QuantifierPusher]: treesize reduction 80, result has 90.0 percent of original size 724 [2021-03-11 23:48:27,135 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2021-03-11 23:48:27,138 INFO L142 QuantifierPusher]: treesize reduction 83, result has 43.5 percent of original size [2021-03-11 23:48:27,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-03-11 23:48:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:48:27,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139415907] [2021-03-11 23:48:27,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:48:27,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:48:27,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332117460] [2021-03-11 23:48:27,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:48:27,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:48:27,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:48:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:48:27,197 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:48:27,198 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) [2021-03-11 23:48:27,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:48:27,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:48:27,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:48:27,356 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-11 23:48:27,500 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-11 23:48:27,529 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-03-11 23:48:27,529 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-11 23:48:27,531 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. [2021-03-11 23:48:27,532 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-03-11 23:48:27,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-03-11 23:48:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:48:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:48:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 23:48:27,551 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-11 23:48:27,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 23:48:27,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 23:48:27,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:48:27,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 23:48:27,565 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) [2021-03-11 23:48:27,572 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) [2021-03-11 23:48:27,573 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) [2021-03-11 23:48:27,574 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-03-11 23:48:27,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-03-11 23:48:27,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-11 23:48:27,578 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-03-11 23:48:27,579 INFO L318 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} [2021-03-11 23:48:27,580 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-11 23:48:27,580 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-03-11 23:48:27,580 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) [2021-03-11 23:48:27,580 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:48:27,580 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:48:27,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 23:48:27,581 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:48:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:48:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash 840283623, now seen corresponding path program 2 times [2021-03-11 23:48:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:48:27,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857009008] [2021-03-11 23:48:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:48:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:48:27,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:48:27,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:48:27,813 INFO L142 QuantifierPusher]: treesize reduction 17330, result has 24.3 percent of original size [2021-03-11 23:48:27,835 INFO L147 QuantifierPusher]: treesize reduction 3202, result has 42.4 percent of original size 2354 [2021-03-11 23:48:28,256 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 42 [2021-03-11 23:48:28,300 INFO L142 QuantifierPusher]: treesize reduction 16793, result has 5.4 percent of original size [2021-03-11 23:48:28,305 INFO L147 QuantifierPusher]: treesize reduction 73, result has 92.5 percent of original size 894 [2021-03-11 23:48:28,592 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 67 [2021-03-11 23:48:28,597 INFO L142 QuantifierPusher]: treesize reduction 558, result has 27.2 percent of original size [2021-03-11 23:48:28,599 INFO L147 QuantifierPusher]: treesize reduction 134, result has 35.6 percent of original size 74 [2021-03-11 23:48:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:48:28,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857009008] [2021-03-11 23:48:28,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:48:28,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:48:28,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124563379] [2021-03-11 23:48:28,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:48:28,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:48:28,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:48:28,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:48:28,665 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:48:28,665 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) [2021-03-11 23:48:28,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:48:28,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:48:28,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:48:28,913 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 23:48:28,924 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-03-11 23:48:28,924 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-03-11 23:48:28,924 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. [2021-03-11 23:48:28,924 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-11 23:48:28,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 85 flow [2021-03-11 23:48:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:48:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:48:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 23:48:28,925 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-11 23:48:28,926 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 23:48:28,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 23:48:28,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:48:28,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 23:48:28,926 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) [2021-03-11 23:48:28,927 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) [2021-03-11 23:48:28,927 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) [2021-03-11 23:48:28,927 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-03-11 23:48:28,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 85 flow [2021-03-11 23:48:28,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-11 23:48:28,928 INFO L241 Difference]: Finished difference. Result has 25 places, 11 transitions, 51 flow [2021-03-11 23:48:28,928 INFO L318 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} [2021-03-11 23:48:28,929 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-03-11 23:48:28,929 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 11 transitions, 51 flow [2021-03-11 23:48:28,929 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) [2021-03-11 23:48:28,929 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:48:28,929 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:48:28,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 23:48:28,929 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:48:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:48:28,930 INFO L82 PathProgramCache]: Analyzing trace with hash -31273989, now seen corresponding path program 3 times [2021-03-11 23:48:28,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:48:28,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892477222] [2021-03-11 23:48:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:48:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:48:29,038 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:48:29,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:48:29,053 INFO L142 QuantifierPusher]: treesize reduction 1571, result has 13.7 percent of original size [2021-03-11 23:48:29,054 INFO L147 QuantifierPusher]: treesize reduction 6, result has 97.6 percent of original size 244 [2021-03-11 23:48:29,163 INFO L142 QuantifierPusher]: treesize reduction 2497, result has 20.8 percent of original size [2021-03-11 23:48:29,166 INFO L147 QuantifierPusher]: treesize reduction 84, result has 87.2 percent of original size 572 [2021-03-11 23:48:29,461 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 79 [2021-03-11 23:48:29,466 INFO L142 QuantifierPusher]: treesize reduction 226, result has 27.8 percent of original size [2021-03-11 23:48:29,469 INFO L147 QuantifierPusher]: treesize reduction 4, result has 95.4 percent of original size 83 [2021-03-11 23:48:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:48:29,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892477222] [2021-03-11 23:48:29,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:48:29,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:48:29,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023501014] [2021-03-11 23:48:29,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:48:29,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:48:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:48:29,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:48:29,513 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:48:29,513 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) [2021-03-11 23:48:29,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:48:29,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:48:29,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:48:29,653 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-03-11 23:48:29,816 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-11 23:48:29,825 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-03-11 23:48:29,826 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-11 23:48:29,826 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. [2021-03-11 23:48:29,826 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-03-11 23:48:29,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 93 flow [2021-03-11 23:48:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:48:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:48:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 23:48:29,830 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-11 23:48:29,830 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 23:48:29,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 23:48:29,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:48:29,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 23:48:29,831 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) [2021-03-11 23:48:29,832 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) [2021-03-11 23:48:29,832 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) [2021-03-11 23:48:29,832 INFO L185 Difference]: Start difference. First operand has 25 places, 11 transitions, 51 flow. Second operand 5 states and 79 transitions. [2021-03-11 23:48:29,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 93 flow [2021-03-11 23:48:29,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 74 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-11 23:48:29,834 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-03-11 23:48:29,835 INFO L318 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} [2021-03-11 23:48:29,835 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-03-11 23:48:29,835 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 12 transitions, 62 flow [2021-03-11 23:48:29,835 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) [2021-03-11 23:48:29,835 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:48:29,835 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:48:29,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 23:48:29,835 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:48:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:48:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash -15909717, now seen corresponding path program 4 times [2021-03-11 23:48:29,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:48:29,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973963705] [2021-03-11 23:48:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:48:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:48:29,901 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:48:29,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:48:29,930 INFO L142 QuantifierPusher]: treesize reduction 8958, result has 1.7 percent of original size [2021-03-11 23:48:29,931 INFO L147 QuantifierPusher]: treesize reduction 37, result has 75.8 percent of original size 116 [2021-03-11 23:48:30,045 INFO L142 QuantifierPusher]: treesize reduction 11767, result has 6.0 percent of original size [2021-03-11 23:48:30,049 INFO L147 QuantifierPusher]: treesize reduction 63, result has 91.6 percent of original size 691 [2021-03-11 23:48:30,299 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2021-03-11 23:48:30,301 INFO L142 QuantifierPusher]: treesize reduction 105, result has 46.7 percent of original size [2021-03-11 23:48:30,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-03-11 23:48:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:48:30,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973963705] [2021-03-11 23:48:30,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:48:30,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:48:30,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972563866] [2021-03-11 23:48:30,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:48:30,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:48:30,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:48:30,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:48:30,356 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:48:30,356 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) [2021-03-11 23:48:30,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:48:30,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:48:30,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:48:30,582 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-03-11 23:48:30,815 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 109 [2021-03-11 23:48:30,824 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-11 23:48:30,825 INFO L130 PetriNetUnfolder]: For 34/37 co-relation queries the response was YES. [2021-03-11 23:48:30,825 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. [2021-03-11 23:48:30,825 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 4/14 dead transitions. [2021-03-11 23:48:30,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 92 flow [2021-03-11 23:48:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:48:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:48:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-03-11 23:48:30,826 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2021-03-11 23:48:30,826 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-03-11 23:48:30,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-03-11 23:48:30,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:48:30,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-03-11 23:48:30,828 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) [2021-03-11 23:48:30,828 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) [2021-03-11 23:48:30,828 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) [2021-03-11 23:48:30,829 INFO L185 Difference]: Start difference. First operand has 27 places, 12 transitions, 62 flow. Second operand 5 states and 78 transitions. [2021-03-11 23:48:30,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 92 flow [2021-03-11 23:48:30,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 14 transitions, 88 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 23:48:30,831 INFO L241 Difference]: Finished difference. Result has 30 places, 10 transitions, 49 flow [2021-03-11 23:48:30,831 INFO L318 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} [2021-03-11 23:48:30,832 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-03-11 23:48:30,832 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 10 transitions, 49 flow [2021-03-11 23:48:30,832 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) [2021-03-11 23:48:30,832 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:48:30,832 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:48:30,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 23:48:30,832 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:48:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:48:30,832 INFO L82 PathProgramCache]: Analyzing trace with hash 815259183, now seen corresponding path program 5 times [2021-03-11 23:48:30,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:48:30,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817802162] [2021-03-11 23:48:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:48:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:48:30,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:48:30,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:48:30,927 INFO L142 QuantifierPusher]: treesize reduction 17560, result has 25.0 percent of original size [2021-03-11 23:48:30,948 INFO L147 QuantifierPusher]: treesize reduction 2578, result has 56.0 percent of original size 3279 [2021-03-11 23:48:31,366 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 61 [2021-03-11 23:48:31,377 INFO L142 QuantifierPusher]: treesize reduction 1219, result has 36.3 percent of original size [2021-03-11 23:48:31,387 INFO L147 QuantifierPusher]: treesize reduction 80, result has 88.5 percent of original size 616 [2021-03-11 23:48:31,690 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-03-11 23:48:31,692 INFO L142 QuantifierPusher]: treesize reduction 230, result has 36.3 percent of original size [2021-03-11 23:48:31,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-03-11 23:48:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:48:31,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817802162] [2021-03-11 23:48:31,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:48:31,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:48:31,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573070027] [2021-03-11 23:48:31,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:48:31,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:48:31,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:48:31,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:48:31,754 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:48:31,754 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) [2021-03-11 23:48:31,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:48:31,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:48:31,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:48:31,878 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 23:48:32,012 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-03-11 23:48:32,018 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 23:48:32,018 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 23:48:32,018 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. [2021-03-11 23:48:32,019 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 2/12 dead transitions. [2021-03-11 23:48:32,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 80 flow [2021-03-11 23:48:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:48:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:48:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-11 23:48:32,020 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-03-11 23:48:32,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-11 23:48:32,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-11 23:48:32,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:48:32,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-11 23:48:32,021 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) [2021-03-11 23:48:32,022 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) [2021-03-11 23:48:32,022 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) [2021-03-11 23:48:32,022 INFO L185 Difference]: Start difference. First operand has 30 places, 10 transitions, 49 flow. Second operand 5 states and 77 transitions. [2021-03-11 23:48:32,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 80 flow [2021-03-11 23:48:32,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 47 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-03-11 23:48:32,023 INFO L241 Difference]: Finished difference. Result has 23 places, 10 transitions, 35 flow [2021-03-11 23:48:32,023 INFO L318 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} [2021-03-11 23:48:32,023 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-03-11 23:48:32,023 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 10 transitions, 35 flow [2021-03-11 23:48:32,023 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) [2021-03-11 23:48:32,023 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:48:32,023 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:48:32,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 23:48:32,024 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:48:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:48:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash -902489877, now seen corresponding path program 6 times [2021-03-11 23:48:32,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:48:32,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094100001] [2021-03-11 23:48:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:48:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:48:32,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:48:32,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:48:32,183 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 280 [2021-03-11 23:48:32,184 INFO L142 QuantifierPusher]: treesize reduction 42009, result has 11.0 percent of original size [2021-03-11 23:48:32,202 INFO L147 QuantifierPusher]: treesize reduction 1231, result has 76.3 percent of original size 3974 [2021-03-11 23:48:32,626 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 53 [2021-03-11 23:48:32,636 INFO L142 QuantifierPusher]: treesize reduction 960, result has 49.3 percent of original size [2021-03-11 23:48:32,641 INFO L147 QuantifierPusher]: treesize reduction 346, result has 63.0 percent of original size 589 [2021-03-11 23:48:32,881 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2021-03-11 23:48:32,888 INFO L142 QuantifierPusher]: treesize reduction 230, result has 36.3 percent of original size [2021-03-11 23:48:32,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-03-11 23:48:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:48:32,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094100001] [2021-03-11 23:48:32,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:48:32,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:48:32,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711937390] [2021-03-11 23:48:32,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:48:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:48:32,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:48:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:48:32,948 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:48:32,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 10 transitions, 35 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:48:32,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:48:32,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:48:32,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:48:33,069 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-03-11 23:48:33,194 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-11 23:48:33,196 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 23:48:33,196 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-11 23:48:33,196 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. [2021-03-11 23:48:33,196 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-11 23:48:33,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 44 flow [2021-03-11 23:48:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:48:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:48:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-11 23:48:33,197 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-03-11 23:48:33,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-11 23:48:33,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-11 23:48:33,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:48:33,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-11 23:48:33,197 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) [2021-03-11 23:48:33,197 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) [2021-03-11 23:48:33,198 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) [2021-03-11 23:48:33,198 INFO L185 Difference]: Start difference. First operand has 23 places, 10 transitions, 35 flow. Second operand 5 states and 75 transitions. [2021-03-11 23:48:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 44 flow [2021-03-11 23:48:33,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 23:48:33,198 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-11 23:48:33,198 INFO L318 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} [2021-03-11 23:48:33,198 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-11 23:48:33,198 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-11 23:48:33,199 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) [2021-03-11 23:48:33,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 23:48:33,201 INFO L202 PluginConnector]: Adding new model container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 11:48:33 BasicIcfg [2021-03-11 23:48:33,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 23:48:33,202 INFO L168 Benchmark]: Toolchain (without parser) took 7977.98 ms. Allocated memory was 255.9 MB in the beginning and 551.6 MB in the end (delta: 295.7 MB). Free memory was 236.7 MB in the beginning and 244.6 MB in the end (delta: -7.8 MB). Peak memory consumption was 289.2 MB. Max. memory is 16.0 GB. [2021-03-11 23:48:33,202 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 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. [2021-03-11 23:48:33,202 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.33 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 23:48:33,203 INFO L168 Benchmark]: Boogie Preprocessor took 15.53 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 827.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 23:48:33,203 INFO L168 Benchmark]: RCFGBuilder took 275.82 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 233.1 MB in the end (delta: 462.3 kB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-11 23:48:33,203 INFO L168 Benchmark]: TraceAbstraction took 7659.87 ms. Allocated memory was 255.9 MB in the beginning and 551.6 MB in the end (delta: 295.7 MB). Free memory was 232.4 MB in the beginning and 244.6 MB in the end (delta: -12.1 MB). Peak memory consumption was 283.9 MB. Max. memory is 16.0 GB. [2021-03-11 23:48:33,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.33 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.53 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 827.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 275.82 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 233.1 MB in the end (delta: 462.3 kB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 7659.87 ms. Allocated memory was 255.9 MB in the beginning and 551.6 MB in the end (delta: 295.7 MB). Free memory was 232.4 MB in the beginning and 244.6 MB in the end (delta: -12.1 MB). Peak memory consumption was 283.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 246.4ms, 24 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 42 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 42, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 34, positive: 34, positive conditional: 0, positive unconditional: 34, 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: 34, positive: 34, positive conditional: 0, positive unconditional: 34, 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: 42, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 34, unknown conditional: 0, unknown unconditional: 34] , Statistics on independence cache: Total cache size (in pairs): 12, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 7602.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1970.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 290.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 98.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5489.7ms 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: 9.5ms SsaConstructionTime, 167.7ms SatisfiabilityAnalysisTime, 5056.6ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 4105 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...