/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 05:46:38,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 05:46:38,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 05:46:38,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 05:46:38,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 05:46:38,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 05:46:38,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 05:46:38,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 05:46:38,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 05:46:38,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 05:46:38,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 05:46:38,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 05:46:38,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 05:46:38,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 05:46:38,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 05:46:38,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 05:46:38,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 05:46:38,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 05:46:38,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 05:46:38,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 05:46:38,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 05:46:38,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 05:46:38,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 05:46:38,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 05:46:38,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 05:46:38,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 05:46:38,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 05:46:38,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 05:46:38,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 05:46:38,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 05:46:38,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 05:46:38,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 05:46:38,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 05:46:38,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 05:46:38,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 05:46:38,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 05:46:38,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 05:46:38,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 05:46:38,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 05:46:38,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 05:46:38,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 05:46:38,704 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-NoLbe.epf [2021-03-11 05:46:38,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 05:46:38,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 05:46:38,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 05:46:38,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 05:46:38,726 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 05:46:38,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 05:46:38,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 05:46:38,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 05:46:38,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 05:46:38,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 05:46:38,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 05:46:38,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 05:46:38,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 05:46:38,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 05:46:38,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 05:46:38,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 05:46:38,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 05:46:38,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 05:46:38,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 05:46:38,729 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 05:46:38,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 05:46:38,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 05:46:38,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 05:46:38,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 05:46:38,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 05:46:38,961 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 05:46:38,961 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 05:46:38,962 INFO L432 ainManager$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 [2021-03-11 05:46:38,962 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl' [2021-03-11 05:46:39,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 05:46:39,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 05:46:39,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 05:46:39,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 05:46:39,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 05:46:39,115 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 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,119 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 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 05:46:39,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 05:46:39,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 05:46:39,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 05:46:39,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (1/1) ... [2021-03-11 05:46:39,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 05:46:39,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 05:46:39,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 05:46:39,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 05:46:39,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (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 05:46:39,174 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 05:46:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 05:46:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 05:46:39,175 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 05:46:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 05:46:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 05:46:39,175 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 05:46:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 05:46:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 05:46:39,175 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 05:46:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 05:46:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 05:46:39,176 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 05:46:39,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 05:46:39,377 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 05:46:39,378 INFO L202 PluginConnector]: Adding new model collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 05:46:39 BoogieIcfgContainer [2021-03-11 05:46:39,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 05:46:39,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 05:46:39,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 05:46:39,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 05:46:39,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:39" (1/2) ... [2021-03-11 05:46:39,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5b3be9 and model type collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 05:46:39, skipping insertion in model container [2021-03-11 05:46:39,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 05:46:39" (2/2) ... [2021-03-11 05:46:39,386 INFO L111 eAbstractionObserver]: Analyzing ICFG collitem-trans.wvr.bpl [2021-03-11 05:46:39,389 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 05:46:39,391 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 05:46:39,391 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 05:46:39,412 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 05:46:39,423 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 05:46:39,436 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 05:46:39,436 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 05:46:39,436 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 05:46:39,436 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 05:46:39,436 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 05:46:39,436 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 05:46:39,436 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 05:46:39,436 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 05:46:39,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 05:46:39,454 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 05:46:39,455 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 05:46:39,456 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 05:46:39,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 05:46:39,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-11 05:46:39,463 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-11 05:46:39,463 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 05:46:39,463 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:39,463 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:39,463 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:39,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1529605242, now seen corresponding path program 1 times [2021-03-11 05:46:39,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:39,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449458525] [2021-03-11 05:46:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:39,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:39,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:39,910 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 227 [2021-03-11 05:46:39,912 INFO L142 QuantifierPusher]: treesize reduction 9035, result has 20.9 percent of original size [2021-03-11 05:46:39,935 INFO L147 QuantifierPusher]: treesize reduction 123, result has 94.8 percent of original size 2264 [2021-03-11 05:46:40,427 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 49 [2021-03-11 05:46:40,448 INFO L142 QuantifierPusher]: treesize reduction 925, result has 39.2 percent of original size [2021-03-11 05:46:40,454 INFO L147 QuantifierPusher]: treesize reduction 112, result has 81.2 percent of original size 484 [2021-03-11 05:46:40,612 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 55 [2021-03-11 05:46:40,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:40,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 05:46:40,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:40,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:40,633 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 05:46:40,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449458525] [2021-03-11 05:46:40,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:40,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:40,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410393436] [2021-03-11 05:46:40,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:40,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:40,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:40,651 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:40,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 14 transitions, 46 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 05:46:40,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:40,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:40,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:40,865 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2021-03-11 05:46:40,865 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-11 05:46:40,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 39 events. 3/39 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 115 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 48. Up to 7 conditions per place. [2021-03-11 05:46:40,867 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-03-11 05:46:40,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-03-11 05:46:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 05:46:40,877 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 05:46:40,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 05:46:40,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 05:46:40,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:40,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 05:46:40,881 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 05:46:40,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:40,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:40,884 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-03-11 05:46:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-03-11 05:46:40,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-11 05:46:40,888 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-03-11 05:46:40,889 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2021-03-11 05:46:40,889 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-03-11 05:46:40,889 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-03-11 05:46:40,889 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 05:46:40,889 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:40,890 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:40,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 05:46:40,890 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash 87231794, now seen corresponding path program 2 times [2021-03-11 05:46:40,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:40,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176921469] [2021-03-11 05:46:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:41,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:41,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:41,088 INFO L142 QuantifierPusher]: treesize reduction 14409, result has 9.3 percent of original size [2021-03-11 05:46:41,097 INFO L147 QuantifierPusher]: treesize reduction 941, result has 36.6 percent of original size 543 [2021-03-11 05:46:41,255 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 36 [2021-03-11 05:46:41,345 INFO L142 QuantifierPusher]: treesize reduction 11357, result has 22.1 percent of original size [2021-03-11 05:46:41,359 INFO L147 QuantifierPusher]: treesize reduction 1082, result has 66.4 percent of original size 2143 [2021-03-11 05:46:41,668 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 50 [2021-03-11 05:46:41,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:41,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-03-11 05:46:41,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:41,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:41,683 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 05:46:41,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176921469] [2021-03-11 05:46:41,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:41,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:41,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511777610] [2021-03-11 05:46:41,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:41,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:41,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:41,688 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:41,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 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 05:46:41,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:41,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:41,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:41,864 INFO L129 PetriNetUnfolder]: 1/46 cut-off events. [2021-03-11 05:46:41,864 INFO L130 PetriNetUnfolder]: For 25/28 co-relation queries the response was YES. [2021-03-11 05:46:41,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 46 events. 1/46 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 177 event pairs, 1 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 71. Up to 8 conditions per place. [2021-03-11 05:46:41,864 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-03-11 05:46:41,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 85 flow [2021-03-11 05:46:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 05:46:41,866 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 05:46:41,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 05:46:41,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 05:46:41,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:41,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 05:46:41,866 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 05:46:41,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:41,867 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:41,867 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-03-11 05:46:41,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 85 flow [2021-03-11 05:46:41,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-11 05:46:41,868 INFO L241 Difference]: Finished difference. Result has 29 places, 16 transitions, 66 flow [2021-03-11 05:46:41,869 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2021-03-11 05:46:41,869 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-03-11 05:46:41,869 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 66 flow [2021-03-11 05:46:41,869 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 05:46:41,869 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:41,869 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:41,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 05:46:41,870 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:41,870 INFO L82 PathProgramCache]: Analyzing trace with hash 37535172, now seen corresponding path program 3 times [2021-03-11 05:46:41,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:41,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610313540] [2021-03-11 05:46:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:41,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:41,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:41,972 INFO L142 QuantifierPusher]: treesize reduction 2027, result has 26.0 percent of original size [2021-03-11 05:46:41,975 INFO L147 QuantifierPusher]: treesize reduction 116, result has 83.8 percent of original size 598 [2021-03-11 05:46:42,086 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2021-03-11 05:46:42,133 INFO L142 QuantifierPusher]: treesize reduction 18199, result has 7.9 percent of original size [2021-03-11 05:46:42,141 INFO L147 QuantifierPusher]: treesize reduction 336, result has 78.5 percent of original size 1227 [2021-03-11 05:46:42,399 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 45 [2021-03-11 05:46:42,405 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:42,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-11 05:46:42,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:42,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:42,420 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 05:46:42,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610313540] [2021-03-11 05:46:42,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:42,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:42,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21830807] [2021-03-11 05:46:42,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:42,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:42,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:42,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:42,422 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:42,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 66 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 05:46:42,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:42,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:42,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:42,579 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2021-03-11 05:46:42,579 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-11 05:46:42,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 41 events. 1/41 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 147 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2021-03-11 05:46:42,580 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 3/21 dead transitions. [2021-03-11 05:46:42,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 120 flow [2021-03-11 05:46:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 05:46:42,581 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 05:46:42,581 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 05:46:42,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 05:46:42,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:42,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 05:46:42,581 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 05:46:42,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:42,582 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:42,582 INFO L185 Difference]: Start difference. First operand has 29 places, 16 transitions, 66 flow. Second operand 5 states and 79 transitions. [2021-03-11 05:46:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 120 flow [2021-03-11 05:46:42,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 110 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-11 05:46:42,584 INFO L241 Difference]: Finished difference. Result has 33 places, 16 transitions, 76 flow [2021-03-11 05:46:42,584 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=16} [2021-03-11 05:46:42,584 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2021-03-11 05:46:42,584 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 16 transitions, 76 flow [2021-03-11 05:46:42,584 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 05:46:42,584 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:42,584 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:42,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 05:46:42,584 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1914605312, now seen corresponding path program 4 times [2021-03-11 05:46:42,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:42,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241201880] [2021-03-11 05:46:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:42,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:42,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:42,667 INFO L142 QuantifierPusher]: treesize reduction 9596, result has 18.7 percent of original size [2021-03-11 05:46:42,676 INFO L147 QuantifierPusher]: treesize reduction 352, result has 84.0 percent of original size 1848 [2021-03-11 05:46:43,125 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 54 [2021-03-11 05:46:43,132 INFO L142 QuantifierPusher]: treesize reduction 936, result has 59.7 percent of original size [2021-03-11 05:46:43,137 INFO L147 QuantifierPusher]: treesize reduction 439, result has 68.4 percent of original size 950 [2021-03-11 05:46:43,390 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 50 [2021-03-11 05:46:43,392 INFO L142 QuantifierPusher]: treesize reduction 16, result has 59.0 percent of original size [2021-03-11 05:46:43,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 05:46:43,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:43,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:43,409 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 05:46:43,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241201880] [2021-03-11 05:46:43,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:43,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:43,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063593387] [2021-03-11 05:46:43,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:43,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:43,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:43,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:43,410 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:43,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 16 transitions, 76 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 05:46:43,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:43,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:43,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:43,634 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-03-11 05:46:43,856 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2021-03-11 05:46:43,868 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-11 05:46:43,868 INFO L130 PetriNetUnfolder]: For 70/76 co-relation queries the response was YES. [2021-03-11 05:46:43,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 38 events. 0/38 cut-off events. For 70/76 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 116 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-11 05:46:43,868 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-03-11 05:46:43,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 20 transitions, 130 flow [2021-03-11 05:46:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 05:46:43,869 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 05:46:43,869 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 05:46:43,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 05:46:43,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:43,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 05:46:43,870 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 05:46:43,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:43,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:43,870 INFO L185 Difference]: Start difference. First operand has 33 places, 16 transitions, 76 flow. Second operand 5 states and 79 transitions. [2021-03-11 05:46:43,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 20 transitions, 130 flow [2021-03-11 05:46:43,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 112 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-03-11 05:46:43,872 INFO L241 Difference]: Finished difference. Result has 35 places, 16 transitions, 79 flow [2021-03-11 05:46:43,872 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=16} [2021-03-11 05:46:43,872 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 11 predicate places. [2021-03-11 05:46:43,872 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 16 transitions, 79 flow [2021-03-11 05:46:43,873 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 05:46:43,873 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:43,873 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:43,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 05:46:43,873 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:43,873 INFO L82 PathProgramCache]: Analyzing trace with hash 927377144, now seen corresponding path program 5 times [2021-03-11 05:46:43,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:43,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628963429] [2021-03-11 05:46:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:43,925 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:43,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:43,931 INFO L142 QuantifierPusher]: treesize reduction 777, result has 37.6 percent of original size [2021-03-11 05:46:43,933 INFO L147 QuantifierPusher]: treesize reduction 56, result has 88.1 percent of original size 413 [2021-03-11 05:46:44,020 INFO L142 QuantifierPusher]: treesize reduction 1033, result has 26.5 percent of original size [2021-03-11 05:46:44,022 INFO L147 QuantifierPusher]: treesize reduction 36, result has 90.3 percent of original size 337 [2021-03-11 05:46:44,129 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2021-03-11 05:46:44,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:44,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-11 05:46:44,156 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:44,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:44,157 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 05:46:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628963429] [2021-03-11 05:46:44,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:44,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:44,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604160876] [2021-03-11 05:46:44,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:44,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:44,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:44,159 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:44,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 16 transitions, 79 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 05:46:44,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:44,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:44,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:44,278 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-03-11 05:46:44,279 INFO L130 PetriNetUnfolder]: For 56/62 co-relation queries the response was YES. [2021-03-11 05:46:44,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 25 events. 0/25 cut-off events. For 56/62 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 45 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 05:46:44,279 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 3/17 dead transitions. [2021-03-11 05:46:44,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 17 transitions, 102 flow [2021-03-11 05:46:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-11 05:46:44,281 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-03-11 05:46:44,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-11 05:46:44,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-11 05:46:44,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:44,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-11 05:46:44,282 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 05:46:44,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:44,282 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:44,282 INFO L185 Difference]: Start difference. First operand has 35 places, 16 transitions, 79 flow. Second operand 5 states and 77 transitions. [2021-03-11 05:46:44,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 17 transitions, 102 flow [2021-03-11 05:46:44,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 17 transitions, 90 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-03-11 05:46:44,283 INFO L241 Difference]: Finished difference. Result has 36 places, 14 transitions, 59 flow [2021-03-11 05:46:44,283 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=36, PETRI_TRANSITIONS=14} [2021-03-11 05:46:44,284 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2021-03-11 05:46:44,284 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 14 transitions, 59 flow [2021-03-11 05:46:44,284 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 05:46:44,284 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:44,284 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:44,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 05:46:44,284 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash 213185016, now seen corresponding path program 6 times [2021-03-11 05:46:44,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:44,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354197643] [2021-03-11 05:46:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:44,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:44,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:44,385 INFO L142 QuantifierPusher]: treesize reduction 26263, result has 10.8 percent of original size [2021-03-11 05:46:44,392 INFO L147 QuantifierPusher]: treesize reduction 2159, result has 31.8 percent of original size 1007 [2021-03-11 05:46:44,576 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 37 [2021-03-11 05:46:44,582 INFO L142 QuantifierPusher]: treesize reduction 1093, result has 20.9 percent of original size [2021-03-11 05:46:44,585 INFO L147 QuantifierPusher]: treesize reduction 144, result has 50.2 percent of original size 145 [2021-03-11 05:46:44,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:44,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-11 05:46:44,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:44,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:44,679 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 05:46:44,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354197643] [2021-03-11 05:46:44,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:44,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:44,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236926157] [2021-03-11 05:46:44,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:44,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:44,680 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:44,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 14 transitions, 59 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 05:46:44,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:44,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:44,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:44,783 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 05:46:44,783 INFO L130 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2021-03-11 05:46:44,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 14 events. 0/14 cut-off events. For 25/27 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-11 05:46:44,783 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-11 05:46:44,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 13 transitions, 69 flow [2021-03-11 05:46:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:44,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-11 05:46:44,784 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-03-11 05:46:44,784 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-11 05:46:44,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-11 05:46:44,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:44,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-11 05:46:44,785 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 05:46:44,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:44,785 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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 05:46:44,785 INFO L185 Difference]: Start difference. First operand has 36 places, 14 transitions, 59 flow. Second operand 5 states and 75 transitions. [2021-03-11 05:46:44,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 13 transitions, 69 flow [2021-03-11 05:46:44,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-03-11 05:46:44,786 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-03-11 05:46:44,786 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-03-11 05:46:44,786 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-03-11 05:46:44,786 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-03-11 05:46:44,786 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 05:46:44,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 05:46:44,790 INFO L202 PluginConnector]: Adding new model collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 05:46:44 BasicIcfg [2021-03-11 05:46:44,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 05:46:44,790 INFO L168 Benchmark]: Toolchain (without parser) took 5688.59 ms. Allocated memory was 255.9 MB in the beginning and 557.8 MB in the end (delta: 302.0 MB). Free memory was 236.9 MB in the beginning and 411.4 MB in the end (delta: -174.5 MB). Peak memory consumption was 128.7 MB. Max. memory is 16.0 GB. [2021-03-11 05:46:44,791 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.27 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. [2021-03-11 05:46:44,791 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.59 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 05:46:44,791 INFO L168 Benchmark]: Boogie Preprocessor took 8.86 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 234.0 MB in the end (delta: 765.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 05:46:44,791 INFO L168 Benchmark]: RCFGBuilder took 244.98 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 232.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.0 GB. [2021-03-11 05:46:44,792 INFO L168 Benchmark]: TraceAbstraction took 5407.34 ms. Allocated memory was 255.9 MB in the beginning and 557.8 MB in the end (delta: 302.0 MB). Free memory was 232.7 MB in the beginning and 411.4 MB in the end (delta: -178.6 MB). Peak memory consumption was 123.0 MB. Max. memory is 16.0 GB. [2021-03-11 05:46:44,793 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 0.27 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 16.59 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.86 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 234.0 MB in the end (delta: 765.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 244.98 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 232.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 5407.34 ms. Allocated memory was 255.9 MB in the beginning and 557.8 MB in the end (delta: 302.0 MB). Free memory was 232.7 MB in the beginning and 411.4 MB in the end (delta: -178.6 MB). Peak memory consumption was 123.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 4.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 5354.0ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1282.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 109.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3757.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=4, 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: 6.2ms SsaConstructionTime, 118.2ms SatisfiabilityAnalysisTime, 3839.8ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2089 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...