/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/container-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 15:49:26,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 15:49:26,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 15:49:26,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 15:49:26,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 15:49:26,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 15:49:26,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 15:49:26,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 15:49:26,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 15:49:26,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 15:49:26,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 15:49:26,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 15:49:26,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 15:49:26,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 15:49:26,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 15:49:26,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 15:49:26,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 15:49:26,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 15:49:26,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 15:49:26,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 15:49:26,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 15:49:26,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 15:49:26,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 15:49:26,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 15:49:26,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 15:49:26,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 15:49:26,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 15:49:26,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 15:49:26,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 15:49:26,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 15:49:26,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 15:49:26,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 15:49:26,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-10 15:49:26,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 15:49:26,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 15:49:26,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 15:49:26,483 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 [2021-06-10 15:49:26,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 15:49:26,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 15:49:26,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 15:49:26,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 15:49:26,520 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 15:49:26,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 15:49:26,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 15:49:26,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 15:49:26,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 15:49:26,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 15:49:26,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 15:49:26,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 15:49:26,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 15:49:26,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 15:49:26,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 15:49:26,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 15:49:26,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 15:49:26,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 15:49:26,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 15:49:26,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 15:49:26,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 15:49:26,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 15:49:26,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 15:49:26,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 15:49:26,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 15:49:26,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 15:49:26,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 15:49:26,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 15:49:26,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 15:49:26,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 15:49:26,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 15:49:26,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 15:49:26,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 15:49:26,835 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 15:49:26,841 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 15:49:26,842 INFO L432 ainManager$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 [2021-06-10 15:49:26,842 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl' [2021-06-10 15:49:26,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 15:49:26,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 15:49:26,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 15:49:26,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 15:49:26,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 15:49:26,890 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 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,897 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 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 15:49:26,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 15:49:26,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 15:49:26,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 15:49:26,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/1) ... [2021-06-10 15:49:26,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 15:49:26,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 15:49:26,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 15:49:26,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 15:49:26,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 15:49:26,984 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 15:49:26,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 15:49:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 15:49:26,984 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 15:49:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 15:49:26,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 15:49:26,985 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 15:49:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 15:49:26,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 15:49:26,985 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-10 15:49:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-10 15:49:26,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-10 15:49:26,986 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 15:49:27,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 15:49:27,243 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 15:49:27,244 INFO L202 PluginConnector]: Adding new model container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:49:27 BoogieIcfgContainer [2021-06-10 15:49:27,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 15:49:27,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 15:49:27,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 15:49:27,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 15:49:27,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:49:26" (1/2) ... [2021-06-10 15:49:27,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f9c4de and model type container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 03:49:27, skipping insertion in model container [2021-06-10 15:49:27,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:49:27" (2/2) ... [2021-06-10 15:49:27,260 INFO L111 eAbstractionObserver]: Analyzing ICFG container-subst.wvr.bpl [2021-06-10 15:49:27,264 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 15:49:27,267 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 15:49:27,268 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 15:49:27,295 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-10 15:49:27,313 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 15:49:27,331 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 15:49:27,331 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 15:49:27,331 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 15:49:27,331 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 15:49:27,331 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 15:49:27,332 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 15:49:27,332 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 15:49:27,332 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 15:49:27,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-10 15:49:27,359 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-10 15:49:27,359 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 15:49:27,361 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. [2021-06-10 15:49:27,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-10 15:49:27,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-10 15:49:27,371 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-10 15:49:27,372 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 15:49:27,372 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:27,373 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:27,373 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:27,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:27,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1529605242, now seen corresponding path program 1 times [2021-06-10 15:49:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:27,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087552153] [2021-06-10 15:49:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:27,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:27,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:28,125 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 178 [2021-06-10 15:49:28,128 INFO L142 QuantifierPusher]: treesize reduction 7366, result has 13.0 percent of original size [2021-06-10 15:49:28,150 INFO L147 QuantifierPusher]: treesize reduction 360, result has 67.2 percent of original size 736 [2021-06-10 15:49:28,596 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 49 [2021-06-10 15:49:28,626 INFO L142 QuantifierPusher]: treesize reduction 713, result has 47.1 percent of original size [2021-06-10 15:49:28,636 INFO L147 QuantifierPusher]: treesize reduction 45, result has 92.9 percent of original size 589 [2021-06-10 15:49:29,049 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2021-06-10 15:49:29,055 INFO L142 QuantifierPusher]: treesize reduction 219, result has 45.9 percent of original size [2021-06-10 15:49:29,057 INFO L147 QuantifierPusher]: treesize reduction 38, result has 79.6 percent of original size 148 [2021-06-10 15:49:29,166 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2021-06-10 15:49:29,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:29,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:29,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087552153] [2021-06-10 15:49:29,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:29,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:29,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45209328] [2021-06-10 15:49:29,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:29,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:29,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:29,192 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:29,195 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) [2021-06-10 15:49:29,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:29,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:29,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:29,411 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-10 15:49:29,610 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-10 15:49:29,624 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2021-06-10 15:49:29,624 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-06-10 15:49:29,625 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. [2021-06-10 15:49:29,626 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-06-10 15:49:29,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-06-10 15:49:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:29,635 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:29,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:29,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:29,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:29,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:29,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:29,643 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) [2021-06-10 15:49:29,644 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) [2021-06-10 15:49:29,645 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:29,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-06-10 15:49:29,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-10 15:49:29,650 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-06-10 15:49:29,651 INFO L326 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} [2021-06-10 15:49:29,652 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-06-10 15:49:29,652 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-06-10 15:49:29,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:29,652 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:29,653 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:29,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 15:49:29,653 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash 87231794, now seen corresponding path program 2 times [2021-06-10 15:49:29,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:29,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597647199] [2021-06-10 15:49:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:29,817 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:29,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:30,441 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 219 [2021-06-10 15:49:30,442 INFO L142 QuantifierPusher]: treesize reduction 99398, result has 10.6 percent of original size [2021-06-10 15:49:30,527 INFO L147 QuantifierPusher]: treesize reduction 7815, result has 33.8 percent of original size 3985 [2021-06-10 15:49:31,048 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 46 [2021-06-10 15:49:31,355 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 168 [2021-06-10 15:49:31,356 INFO L142 QuantifierPusher]: treesize reduction 39213, result has 16.6 percent of original size [2021-06-10 15:49:31,399 INFO L147 QuantifierPusher]: treesize reduction 5237, result has 32.9 percent of original size 2567 [2021-06-10 15:49:32,004 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 66 [2021-06-10 15:49:32,008 INFO L142 QuantifierPusher]: treesize reduction 638, result has 7.4 percent of original size [2021-06-10 15:49:32,008 INFO L147 QuantifierPusher]: treesize reduction 10, result has 80.4 percent of original size 41 [2021-06-10 15:49:32,040 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:32,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:32,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597647199] [2021-06-10 15:49:32,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:32,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:32,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564614920] [2021-06-10 15:49:32,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:32,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:32,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:32,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:32,046 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:32,046 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) [2021-06-10 15:49:32,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:32,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:32,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:32,177 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-10 15:49:32,337 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-10 15:49:32,353 INFO L129 PetriNetUnfolder]: 1/46 cut-off events. [2021-06-10 15:49:32,353 INFO L130 PetriNetUnfolder]: For 25/28 co-relation queries the response was YES. [2021-06-10 15:49:32,353 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. [2021-06-10 15:49:32,354 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-06-10 15:49:32,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 85 flow [2021-06-10 15:49:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:32,356 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:32,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:32,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:32,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:32,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:32,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:32,358 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) [2021-06-10 15:49:32,358 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) [2021-06-10 15:49:32,358 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:32,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 85 flow [2021-06-10 15:49:32,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-10 15:49:32,360 INFO L241 Difference]: Finished difference. Result has 29 places, 16 transitions, 66 flow [2021-06-10 15:49:32,360 INFO L326 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} [2021-06-10 15:49:32,361 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-10 15:49:32,361 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 66 flow [2021-06-10 15:49:32,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:32,361 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:32,361 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:32,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 15:49:32,362 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:32,362 INFO L82 PathProgramCache]: Analyzing trace with hash 37535172, now seen corresponding path program 3 times [2021-06-10 15:49:32,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:32,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719607571] [2021-06-10 15:49:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:32,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:32,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:32,458 INFO L142 QuantifierPusher]: treesize reduction 3302, result has 4.3 percent of original size [2021-06-10 15:49:32,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-06-10 15:49:32,556 INFO L142 QuantifierPusher]: treesize reduction 376, result has 54.4 percent of original size [2021-06-10 15:49:32,559 INFO L147 QuantifierPusher]: treesize reduction 33, result has 92.6 percent of original size 415 [2021-06-10 15:49:32,859 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2021-06-10 15:49:32,861 INFO L142 QuantifierPusher]: treesize reduction 90, result has 53.4 percent of original size [2021-06-10 15:49:32,862 INFO L147 QuantifierPusher]: treesize reduction 7, result has 93.2 percent of original size 96 [2021-06-10 15:49:32,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:32,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:32,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719607571] [2021-06-10 15:49:32,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:32,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:32,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249385430] [2021-06-10 15:49:32,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:32,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:32,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:32,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:32,970 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:32,971 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) [2021-06-10 15:49:32,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:32,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:32,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:33,159 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-10 15:49:33,327 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-10 15:49:33,342 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2021-06-10 15:49:33,342 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-06-10 15:49:33,343 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. [2021-06-10 15:49:33,343 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 3/21 dead transitions. [2021-06-10 15:49:33,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 120 flow [2021-06-10 15:49:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:33,345 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:33,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:33,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:33,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:33,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:33,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:33,347 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) [2021-06-10 15:49:33,347 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) [2021-06-10 15:49:33,347 INFO L185 Difference]: Start difference. First operand has 29 places, 16 transitions, 66 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:33,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 120 flow [2021-06-10 15:49:33,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 110 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-10 15:49:33,349 INFO L241 Difference]: Finished difference. Result has 33 places, 16 transitions, 76 flow [2021-06-10 15:49:33,350 INFO L326 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} [2021-06-10 15:49:33,350 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2021-06-10 15:49:33,350 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 16 transitions, 76 flow [2021-06-10 15:49:33,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:33,350 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:33,350 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:33,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 15:49:33,351 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:33,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1914605312, now seen corresponding path program 4 times [2021-06-10 15:49:33,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:33,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139402074] [2021-06-10 15:49:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:33,429 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:33,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:33,689 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 385 [2021-06-10 15:49:33,691 INFO L142 QuantifierPusher]: treesize reduction 68232, result has 12.3 percent of original size [2021-06-10 15:49:33,758 INFO L147 QuantifierPusher]: treesize reduction 3503, result has 63.3 percent of original size 6052 [2021-06-10 15:49:34,532 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 57 [2021-06-10 15:49:34,553 INFO L142 QuantifierPusher]: treesize reduction 5036, result has 13.5 percent of original size [2021-06-10 15:49:34,557 INFO L147 QuantifierPusher]: treesize reduction 233, result has 70.4 percent of original size 554 [2021-06-10 15:49:34,830 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 67 [2021-06-10 15:49:34,844 INFO L142 QuantifierPusher]: treesize reduction 524, result has 20.1 percent of original size [2021-06-10 15:49:34,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-06-10 15:49:34,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:34,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:34,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139402074] [2021-06-10 15:49:34,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:34,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:34,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241898299] [2021-06-10 15:49:34,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:34,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:34,915 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:34,916 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) [2021-06-10 15:49:34,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:34,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:34,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:35,042 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-10 15:49:35,181 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-10 15:49:35,205 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-06-10 15:49:35,205 INFO L130 PetriNetUnfolder]: For 70/76 co-relation queries the response was YES. [2021-06-10 15:49:35,205 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. [2021-06-10 15:49:35,205 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-06-10 15:49:35,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 20 transitions, 130 flow [2021-06-10 15:49:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:35,207 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:35,207 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:35,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:35,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:35,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:35,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:35,209 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) [2021-06-10 15:49:35,209 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) [2021-06-10 15:49:35,209 INFO L185 Difference]: Start difference. First operand has 33 places, 16 transitions, 76 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:35,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 20 transitions, 130 flow [2021-06-10 15:49:35,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 112 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-06-10 15:49:35,212 INFO L241 Difference]: Finished difference. Result has 35 places, 16 transitions, 79 flow [2021-06-10 15:49:35,212 INFO L326 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} [2021-06-10 15:49:35,212 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 11 predicate places. [2021-06-10 15:49:35,212 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 16 transitions, 79 flow [2021-06-10 15:49:35,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:35,212 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:35,212 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:35,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 15:49:35,213 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:35,213 INFO L82 PathProgramCache]: Analyzing trace with hash 927377144, now seen corresponding path program 5 times [2021-06-10 15:49:35,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:35,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572754530] [2021-06-10 15:49:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:35,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:35,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:35,273 INFO L142 QuantifierPusher]: treesize reduction 578, result has 24.3 percent of original size [2021-06-10 15:49:35,275 INFO L147 QuantifierPusher]: treesize reduction 11, result has 94.1 percent of original size 175 [2021-06-10 15:49:35,379 INFO L142 QuantifierPusher]: treesize reduction 1338, result has 28.6 percent of original size [2021-06-10 15:49:35,383 INFO L147 QuantifierPusher]: treesize reduction 50, result has 90.7 percent of original size 487 [2021-06-10 15:49:35,704 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2021-06-10 15:49:35,713 INFO L142 QuantifierPusher]: treesize reduction 11, result has 86.7 percent of original size [2021-06-10 15:49:35,714 INFO L147 QuantifierPusher]: treesize reduction 13, result has 81.9 percent of original size 59 [2021-06-10 15:49:35,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:35,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:35,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572754530] [2021-06-10 15:49:35,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:35,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:35,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955724828] [2021-06-10 15:49:35,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:35,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:35,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:35,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:35,763 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:35,764 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) [2021-06-10 15:49:35,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:35,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:35,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:35,994 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-10 15:49:36,019 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-06-10 15:49:36,019 INFO L130 PetriNetUnfolder]: For 56/62 co-relation queries the response was YES. [2021-06-10 15:49:36,019 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. [2021-06-10 15:49:36,020 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 3/17 dead transitions. [2021-06-10 15:49:36,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 17 transitions, 102 flow [2021-06-10 15:49:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-10 15:49:36,021 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-06-10 15:49:36,021 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-10 15:49:36,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-10 15:49:36,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:36,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-10 15:49:36,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:36,022 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) [2021-06-10 15:49:36,023 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) [2021-06-10 15:49:36,023 INFO L185 Difference]: Start difference. First operand has 35 places, 16 transitions, 79 flow. Second operand 5 states and 77 transitions. [2021-06-10 15:49:36,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 17 transitions, 102 flow [2021-06-10 15:49:36,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 17 transitions, 90 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-06-10 15:49:36,025 INFO L241 Difference]: Finished difference. Result has 36 places, 14 transitions, 59 flow [2021-06-10 15:49:36,025 INFO L326 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} [2021-06-10 15:49:36,025 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2021-06-10 15:49:36,025 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 14 transitions, 59 flow [2021-06-10 15:49:36,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:36,026 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:36,026 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:36,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 15:49:36,026 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash 213185016, now seen corresponding path program 6 times [2021-06-10 15:49:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:36,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329376594] [2021-06-10 15:49:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:36,128 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:36,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:37,076 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 373 [2021-06-10 15:49:37,078 INFO L142 QuantifierPusher]: treesize reduction 250140, result has 7.7 percent of original size [2021-06-10 15:49:37,151 INFO L147 QuantifierPusher]: treesize reduction 5046, result has 75.7 percent of original size 15730 [2021-06-10 15:49:37,914 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 47 [2021-06-10 15:49:37,935 INFO L142 QuantifierPusher]: treesize reduction 2696, result has 24.2 percent of original size [2021-06-10 15:49:37,942 INFO L147 QuantifierPusher]: treesize reduction 158, result has 81.6 percent of original size 703 [2021-06-10 15:49:38,101 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 47 [2021-06-10 15:49:38,106 INFO L142 QuantifierPusher]: treesize reduction 782, result has 13.8 percent of original size [2021-06-10 15:49:38,107 INFO L147 QuantifierPusher]: treesize reduction 8, result has 93.6 percent of original size 117 [2021-06-10 15:49:38,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:38,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:38,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329376594] [2021-06-10 15:49:38,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:38,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:38,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570362032] [2021-06-10 15:49:38,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:38,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:38,195 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:38,196 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) [2021-06-10 15:49:38,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:38,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:38,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:38,326 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-10 15:49:38,502 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-06-10 15:49:38,503 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-10 15:49:38,504 INFO L130 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2021-06-10 15:49:38,504 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. [2021-06-10 15:49:38,504 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-06-10 15:49:38,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 13 transitions, 69 flow [2021-06-10 15:49:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-10 15:49:38,505 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-06-10 15:49:38,505 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-10 15:49:38,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-10 15:49:38,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:38,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-10 15:49:38,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:38,506 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) [2021-06-10 15:49:38,506 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) [2021-06-10 15:49:38,506 INFO L185 Difference]: Start difference. First operand has 36 places, 14 transitions, 59 flow. Second operand 5 states and 75 transitions. [2021-06-10 15:49:38,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 13 transitions, 69 flow [2021-06-10 15:49:38,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-06-10 15:49:38,507 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-06-10 15:49:38,507 INFO L326 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} [2021-06-10 15:49:38,507 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-06-10 15:49:38,508 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-06-10 15:49:38,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:38,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 15:49:38,512 INFO L202 PluginConnector]: Adding new model container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 03:49:38 BasicIcfg [2021-06-10 15:49:38,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 15:49:38,513 INFO L168 Benchmark]: Toolchain (without parser) took 11635.82 ms. Allocated memory was 346.0 MB in the beginning and 599.8 MB in the end (delta: 253.8 MB). Free memory was 325.3 MB in the beginning and 376.2 MB in the end (delta: -50.9 MB). Peak memory consumption was 204.4 MB. Max. memory is 16.0 GB. [2021-06-10 15:49:38,514 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory is still 326.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:49:38,514 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.95 ms. Allocated memory is still 346.0 MB. Free memory was 325.2 MB in the beginning and 323.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:49:38,515 INFO L168 Benchmark]: Boogie Preprocessor took 17.11 ms. Allocated memory is still 346.0 MB. Free memory was 323.8 MB in the beginning and 322.8 MB in the end (delta: 945.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 15:49:38,515 INFO L168 Benchmark]: RCFGBuilder took 321.07 ms. Allocated memory is still 346.0 MB. Free memory was 322.8 MB in the beginning and 305.5 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-10 15:49:38,515 INFO L168 Benchmark]: TraceAbstraction took 11266.80 ms. Allocated memory was 346.0 MB in the beginning and 599.8 MB in the end (delta: 253.8 MB). Free memory was 305.1 MB in the beginning and 376.2 MB in the end (delta: -71.2 MB). Peak memory consumption was 185.6 MB. Max. memory is 16.0 GB. [2021-06-10 15:49:38,517 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 0.13 ms. Allocated memory is still 346.0 MB. Free memory is still 326.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.95 ms. Allocated memory is still 346.0 MB. Free memory was 325.2 MB in the beginning and 323.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.11 ms. Allocated memory is still 346.0 MB. Free memory was 323.8 MB in the beginning and 322.8 MB in the end (delta: 945.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 321.07 ms. Allocated memory is still 346.0 MB. Free memory was 322.8 MB in the beginning and 305.5 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 11266.80 ms. Allocated memory was 346.0 MB in the beginning and 599.8 MB in the end (delta: 253.8 MB). Free memory was 305.1 MB in the beginning and 376.2 MB in the end (delta: -71.2 MB). Peak memory consumption was 185.6 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 11181.5ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 2035.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 151.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6863.3ms 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: 9.1ms SsaConstructionTime, 269.7ms SatisfiabilityAnalysisTime, 8713.8ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 4314 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...