/usr/bin/java -Xmx8000000000 -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/POPL2022/bluetooth-customized04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-1c3aa5735269c4be989a50fc1da9ea7b9492ef29-1c3aa57 [2021-07-01 09:55:55,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-01 09:55:55,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-01 09:55:55,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-01 09:55:55,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-01 09:55:55,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-01 09:55:55,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-01 09:55:55,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-01 09:55:55,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-01 09:55:55,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-01 09:55:55,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-01 09:55:55,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-01 09:55:55,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-01 09:55:55,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-01 09:55:55,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-01 09:55:55,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-01 09:55:55,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-01 09:55:55,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-01 09:55:55,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-01 09:55:55,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-01 09:55:55,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-01 09:55:55,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-01 09:55:55,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-01 09:55:55,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-01 09:55:55,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-01 09:55:55,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-01 09:55:55,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-01 09:55:55,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-01 09:55:55,894 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 [2021-07-01 09:55:55,923 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-01 09:55:55,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-01 09:55:55,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-01 09:55:55,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-01 09:55:55,925 INFO L138 SettingsManager]: * Use SBE=true [2021-07-01 09:55:55,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-01 09:55:55,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-01 09:55:55,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-01 09:55:55,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-01 09:55:55,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-01 09:55:55,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-01 09:55:55,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-01 09:55:55,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-01 09:55:55,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-01 09:55:55,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-01 09:55:55,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-01 09:55:55,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-01 09:55:55,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-01 09:55:55,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-01 09:55:55,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-01 09:55:55,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-01 09:55:55,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 09:55:55,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-01 09:55:55,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-01 09:55:55,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-01 09:55:55,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-01 09:55:55,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-01 09:55:55,929 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-01 09:55:55,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-07-01 09:55:55,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-01 09:55:56,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-01 09:55:56,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-01 09:55:56,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-01 09:55:56,247 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-01 09:55:56,248 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-01 09:55:56,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-customized04.bpl [2021-07-01 09:55:56,249 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-customized04.bpl' [2021-07-01 09:55:56,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-01 09:55:56,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-01 09:55:56,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-01 09:55:56,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-01 09:55:56,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-01 09:55:56,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-01 09:55:56,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-01 09:55:56,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-01 09:55:56,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-01 09:55:56,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/1) ... [2021-07-01 09:55:56,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-01 09:55:56,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-01 09:55:56,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-01 09:55:56,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-01 09:55:56,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (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 [2021-07-01 09:55:56,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThreadWithAssert given in one single declaration [2021-07-01 09:55:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThreadWithAssert [2021-07-01 09:55:56,390 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThreadWithAssert [2021-07-01 09:55:56,391 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-07-01 09:55:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-07-01 09:55:56,391 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-07-01 09:55:56,391 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-07-01 09:55:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-07-01 09:55:56,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-07-01 09:55:56,391 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-01 09:55:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-01 09:55:56,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-01 09:55:56,392 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-01 09:55:56,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-01 09:55:56,628 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-07-01 09:55:56,629 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadWithAssertEXIT is neither atomic block end nor error location. [2021-07-01 09:55:56,629 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-07-01 09:55:56,630 INFO L202 PluginConnector]: Adding new model bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 09:55:56 BoogieIcfgContainer [2021-07-01 09:55:56,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-01 09:55:56,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-01 09:55:56,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-01 09:55:56,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-01 09:55:56,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:55:56" (1/2) ... [2021-07-01 09:55:56,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485cd5a and model type bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 09:55:56, skipping insertion in model container [2021-07-01 09:55:56,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 09:55:56" (2/2) ... [2021-07-01 09:55:56,635 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-customized04.bpl [2021-07-01 09:55:56,638 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-01 09:55:56,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-01 09:55:56,639 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-01 09:55:56,700 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-01 09:55:56,730 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-01 09:55:56,759 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 09:55:56,759 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 09:55:56,759 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 09:55:56,759 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 09:55:56,759 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 09:55:56,759 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 09:55:56,760 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 09:55:56,760 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-01 09:55:56,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 34 transitions, 93 flow [2021-07-01 09:55:56,796 INFO L129 PetriNetUnfolder]: 4/29 cut-off events. [2021-07-01 09:55:56,796 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:55:56,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 29 events. 4/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 64 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2021-07-01 09:55:56,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 34 transitions, 93 flow [2021-07-01 09:55:56,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-07-01 09:55:56,804 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-07-01 09:55:56,804 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:55:56,805 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/2) [2021-07-01 09:55:56,807 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-01 09:55:56,815 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 09:55:56,815 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 09:55:56,816 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 09:55:56,816 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 09:55:56,816 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 09:55:56,816 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 09:55:56,816 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 09:55:56,816 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadWithAssertThread1of1ForFork1======== [2021-07-01 09:55:56,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 34 transitions, 93 flow [2021-07-01 09:55:56,857 INFO L129 PetriNetUnfolder]: 4/29 cut-off events. [2021-07-01 09:55:56,857 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:55:56,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 29 events. 4/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 64 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2021-07-01 09:55:56,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 34 transitions, 93 flow [2021-07-01 09:55:56,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 29 transitions, 73 flow [2021-07-01 09:55:56,870 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-07-01 09:55:56,870 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:55:56,871 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-07-01 09:55:56,871 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:55:56,871 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:55:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:55:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash -881879959, now seen corresponding path program 1 times [2021-07-01 09:55:56,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:55:56,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054147693] [2021-07-01 09:55:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:55:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:55:56,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:56,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:56,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:56,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:55:56,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:55:56,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054147693] [2021-07-01 09:55:57,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054147693] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:55:57,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:55:57,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-01 09:55:57,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462689380] [2021-07-01 09:55:57,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-01 09:55:57,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:55:57,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-01 09:55:57,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-01 09:55:57,025 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 34 [2021-07-01 09:55:57,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-07-01 09:55:57,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-07-01 09:55:57,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 34 [2021-07-01 09:55:57,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-07-01 09:55:57,151 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([99] L69-2-->L58: Formula: (and (not v_stoppingFlag_5) (= v_pendingIo_22 (+ v_pendingIo_23 1))) InVars {pendingIo=v_pendingIo_23, stoppingFlag=v_stoppingFlag_5} OutVars{pendingIo=v_pendingIo_22, stoppingFlag=v_stoppingFlag_5} AuxVars[] AssignedVars[pendingIo][24], [32#L92-2true, 49#true, 36#L69-2true, 38#L58true, DeviceThreadWithAssertThread1of1ForFork1InUse, 25#L69-2true, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse, 13#L23true, DeviceThreadThread1of1ForFork3InUse, DeviceThreadThread1of1ForFork4NotInUse]) [2021-07-01 09:55:57,151 INFO L384 tUnfolder$Statistics]: this new event has 13 ancestors and is cut-off event [2021-07-01 09:55:57,151 INFO L387 tUnfolder$Statistics]: existing Event has 14 ancestors and is cut-off event [2021-07-01 09:55:57,151 INFO L387 tUnfolder$Statistics]: existing Event has 11 ancestors and is cut-off event [2021-07-01 09:55:57,151 INFO L387 tUnfolder$Statistics]: existing Event has 13 ancestors and is cut-off event [2021-07-01 09:55:57,158 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([93] L69-2-->L58: Formula: (and (not v_stoppingFlag_5) (= v_pendingIo_22 (+ v_pendingIo_23 1))) InVars {pendingIo=v_pendingIo_23, stoppingFlag=v_stoppingFlag_5} OutVars{pendingIo=v_pendingIo_22, stoppingFlag=v_stoppingFlag_5} AuxVars[] AssignedVars[pendingIo][36], [32#L92-2true, DeviceThreadThread1of1ForFork4InUse, 49#true, 17#ULTIMATE.startFINALtrue, 3#L69-2true, 4#L58true, 36#L69-2true, DeviceThreadWithAssertThread1of1ForFork1InUse, 25#L69-2true, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse, DeviceThreadThread1of1ForFork3InUse]) [2021-07-01 09:55:57,158 INFO L384 tUnfolder$Statistics]: this new event has 12 ancestors and is not cut-off event [2021-07-01 09:55:57,158 INFO L387 tUnfolder$Statistics]: existing Event has 14 ancestors and is not cut-off event [2021-07-01 09:55:57,158 INFO L387 tUnfolder$Statistics]: existing Event has 14 ancestors and is not cut-off event [2021-07-01 09:55:57,158 INFO L387 tUnfolder$Statistics]: existing Event has 15 ancestors and is not cut-off event [2021-07-01 09:55:57,191 INFO L382 tUnfolder$Statistics]: inserting event number 5 for the transition-marking pair ([93] L69-2-->L58: Formula: (and (not v_stoppingFlag_5) (= v_pendingIo_22 (+ v_pendingIo_23 1))) InVars {pendingIo=v_pendingIo_23, stoppingFlag=v_stoppingFlag_5} OutVars{pendingIo=v_pendingIo_22, stoppingFlag=v_stoppingFlag_5} AuxVars[] AssignedVars[pendingIo][36], [32#L92-2true, DeviceThreadThread1of1ForFork4InUse, 17#ULTIMATE.startFINALtrue, 49#true, 3#L69-2true, 36#L69-2true, 4#L58true, DeviceThreadWithAssertThread1of1ForFork1InUse, 25#L69-2true, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse, DeviceThreadThread1of1ForFork3InUse]) [2021-07-01 09:55:57,192 INFO L384 tUnfolder$Statistics]: this new event has 14 ancestors and is cut-off event [2021-07-01 09:55:57,192 INFO L387 tUnfolder$Statistics]: existing Event has 14 ancestors and is cut-off event [2021-07-01 09:55:57,192 INFO L387 tUnfolder$Statistics]: existing Event has 14 ancestors and is cut-off event [2021-07-01 09:55:57,192 INFO L387 tUnfolder$Statistics]: existing Event has 12 ancestors and is cut-off event [2021-07-01 09:55:57,192 INFO L387 tUnfolder$Statistics]: existing Event has 15 ancestors and is cut-off event [2021-07-01 09:55:57,215 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([93] L69-2-->L58: Formula: (and (not v_stoppingFlag_5) (= v_pendingIo_22 (+ v_pendingIo_23 1))) InVars {pendingIo=v_pendingIo_23, stoppingFlag=v_stoppingFlag_5} OutVars{pendingIo=v_pendingIo_22, stoppingFlag=v_stoppingFlag_5} AuxVars[] AssignedVars[pendingIo][36], [32#L92-2true, DeviceThreadThread1of1ForFork4InUse, 49#true, 17#ULTIMATE.startFINALtrue, 3#L69-2true, 4#L58true, 36#L69-2true, DeviceThreadWithAssertThread1of1ForFork1InUse, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse, 29#L58true, DeviceThreadThread1of1ForFork3InUse]) [2021-07-01 09:55:57,216 INFO L384 tUnfolder$Statistics]: this new event has 15 ancestors and is cut-off event [2021-07-01 09:55:57,216 INFO L387 tUnfolder$Statistics]: existing Event has 15 ancestors and is cut-off event [2021-07-01 09:55:57,216 INFO L387 tUnfolder$Statistics]: existing Event has 13 ancestors and is cut-off event [2021-07-01 09:55:57,216 INFO L387 tUnfolder$Statistics]: existing Event has 15 ancestors and is cut-off event [2021-07-01 09:55:57,221 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([93] L69-2-->L58: Formula: (and (not v_stoppingFlag_5) (= v_pendingIo_22 (+ v_pendingIo_23 1))) InVars {pendingIo=v_pendingIo_23, stoppingFlag=v_stoppingFlag_5} OutVars{pendingIo=v_pendingIo_22, stoppingFlag=v_stoppingFlag_5} AuxVars[] AssignedVars[pendingIo][37], [32#L92-2true, DeviceThreadThread1of1ForFork4InUse, 17#ULTIMATE.startFINALtrue, 3#L69-2true, 36#L69-2true, 4#L58true, 52#(<= 2 pendingIo), DeviceThreadWithAssertThread1of1ForFork1InUse, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse, 29#L58true, DeviceThreadThread1of1ForFork3InUse]) [2021-07-01 09:55:57,222 INFO L384 tUnfolder$Statistics]: this new event has 15 ancestors and is cut-off event [2021-07-01 09:55:57,222 INFO L387 tUnfolder$Statistics]: existing Event has 15 ancestors and is cut-off event [2021-07-01 09:55:57,222 INFO L387 tUnfolder$Statistics]: existing Event has 13 ancestors and is cut-off event [2021-07-01 09:55:57,222 INFO L387 tUnfolder$Statistics]: existing Event has 15 ancestors and is cut-off event [2021-07-01 09:55:57,250 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([93] L69-2-->L58: Formula: (and (not v_stoppingFlag_5) (= v_pendingIo_22 (+ v_pendingIo_23 1))) InVars {pendingIo=v_pendingIo_23, stoppingFlag=v_stoppingFlag_5} OutVars{pendingIo=v_pendingIo_22, stoppingFlag=v_stoppingFlag_5} AuxVars[] AssignedVars[pendingIo][36], [32#L92-2true, DeviceThreadThread1of1ForFork4InUse, 49#true, 17#ULTIMATE.startFINALtrue, 3#L69-2true, 4#L58true, 36#L69-2true, 37#DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERTtrue, DeviceThreadWithAssertThread1of1ForFork1InUse, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse, DeviceThreadThread1of1ForFork3InUse]) [2021-07-01 09:55:57,250 INFO L384 tUnfolder$Statistics]: this new event has 16 ancestors and is cut-off event [2021-07-01 09:55:57,250 INFO L387 tUnfolder$Statistics]: existing Event has 14 ancestors and is cut-off event [2021-07-01 09:55:57,250 INFO L387 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2021-07-01 09:55:57,250 INFO L387 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2021-07-01 09:55:57,251 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([93] L69-2-->L58: Formula: (and (not v_stoppingFlag_5) (= v_pendingIo_22 (+ v_pendingIo_23 1))) InVars {pendingIo=v_pendingIo_23, stoppingFlag=v_stoppingFlag_5} OutVars{pendingIo=v_pendingIo_22, stoppingFlag=v_stoppingFlag_5} AuxVars[] AssignedVars[pendingIo][37], [32#L92-2true, DeviceThreadThread1of1ForFork4InUse, 17#ULTIMATE.startFINALtrue, 3#L69-2true, 36#L69-2true, 4#L58true, 52#(<= 2 pendingIo), DeviceThreadWithAssertThread1of1ForFork1InUse, 26#L67true, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse, DeviceThreadThread1of1ForFork3InUse]) [2021-07-01 09:55:57,251 INFO L384 tUnfolder$Statistics]: this new event has 16 ancestors and is cut-off event [2021-07-01 09:55:57,251 INFO L387 tUnfolder$Statistics]: existing Event has 14 ancestors and is cut-off event [2021-07-01 09:55:57,251 INFO L387 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2021-07-01 09:55:57,251 INFO L387 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2021-07-01 09:55:57,277 INFO L129 PetriNetUnfolder]: 885/1278 cut-off events. [2021-07-01 09:55:57,277 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:55:57,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2433 conditions, 1278 events. 885/1278 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5325 event pairs, 139 based on Foata normal form. 0/1242 useless extension candidates. Maximal degree in co-relation 2418. Up to 654 conditions per place. [2021-07-01 09:55:57,288 INFO L132 encePairwiseOnDemand]: 22/34 looper letters, 16 selfloop transitions, 16 changer transitions 0/49 dead transitions. [2021-07-01 09:55:57,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 177 flow [2021-07-01 09:55:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-01 09:55:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-07-01 09:55:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2021-07-01 09:55:57,295 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8970588235294118 [2021-07-01 09:55:57,296 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 122 transitions. [2021-07-01 09:55:57,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 122 transitions. [2021-07-01 09:55:57,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-07-01 09:55:57,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 122 transitions. [2021-07-01 09:55:57,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 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) [2021-07-01 09:55:57,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2021-07-01 09:55:57,302 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2021-07-01 09:55:57,303 INFO L185 Difference]: Start difference. First operand has 41 places, 29 transitions, 73 flow. Second operand 4 states and 122 transitions. [2021-07-01 09:55:57,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 177 flow [2021-07-01 09:55:57,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-07-01 09:55:57,307 INFO L241 Difference]: Finished difference. Result has 42 places, 44 transitions, 186 flow [2021-07-01 09:55:57,308 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2021-07-01 09:55:57,309 INFO L335 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2021-07-01 09:55:57,309 INFO L482 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 186 flow [2021-07-01 09:55:57,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-07-01 09:55:57,309 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-07-01 09:55:57,309 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:55:57,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-01 09:55:57,310 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:55:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:55:57,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1377680694, now seen corresponding path program 1 times [2021-07-01 09:55:57,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:55:57,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046108087] [2021-07-01 09:55:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:55:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:55:57,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 09:55:57,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 09:55:57,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 09:55:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:55:57,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:55:57,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046108087] [2021-07-01 09:55:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046108087] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:55:57,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:55:57,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-01 09:55:57,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769978984] [2021-07-01 09:55:57,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-01 09:55:57,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:55:57,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-01 09:55:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 09:55:57,324 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 34 [2021-07-01 09:55:57,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-07-01 09:55:57,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-07-01 09:55:57,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 34 [2021-07-01 09:55:57,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-07-01 09:55:57,393 INFO L129 PetriNetUnfolder]: 536/1045 cut-off events. [2021-07-01 09:55:57,393 INFO L130 PetriNetUnfolder]: For 889/963 co-relation queries the response was YES. [2021-07-01 09:55:57,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2546 conditions, 1045 events. 536/1045 cut-off events. For 889/963 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5934 event pairs, 51 based on Foata normal form. 412/1416 useless extension candidates. Maximal degree in co-relation 2531. Up to 484 conditions per place. [2021-07-01 09:55:57,399 INFO L132 encePairwiseOnDemand]: 29/34 looper letters, 9 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2021-07-01 09:55:57,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 206 flow [2021-07-01 09:55:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-01 09:55:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-07-01 09:55:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2021-07-01 09:55:57,401 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9215686274509803 [2021-07-01 09:55:57,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2021-07-01 09:55:57,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2021-07-01 09:55:57,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-07-01 09:55:57,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2021-07-01 09:55:57,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-07-01 09:55:57,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-07-01 09:55:57,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-07-01 09:55:57,403 INFO L185 Difference]: Start difference. First operand has 42 places, 44 transitions, 186 flow. Second operand 3 states and 94 transitions. [2021-07-01 09:55:57,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 206 flow [2021-07-01 09:55:57,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-07-01 09:55:57,406 INFO L241 Difference]: Finished difference. Result has 45 places, 44 transitions, 205 flow [2021-07-01 09:55:57,406 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2021-07-01 09:55:57,407 INFO L335 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2021-07-01 09:55:57,407 INFO L482 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 205 flow [2021-07-01 09:55:57,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-07-01 09:55:57,407 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-07-01 09:55:57,407 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:55:57,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-01 09:55:57,408 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:55:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:55:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1834784144, now seen corresponding path program 1 times [2021-07-01 09:55:57,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:55:57,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086209760] [2021-07-01 09:55:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:55:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:55:57,424 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,431 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:55:57,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:55:57,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086209760] [2021-07-01 09:55:57,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086209760] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:55:57,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:55:57,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-01 09:55:57,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168916657] [2021-07-01 09:55:57,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-01 09:55:57,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:55:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-01 09:55:57,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-01 09:55:57,439 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 34 [2021-07-01 09:55:57,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2021-07-01 09:55:57,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-07-01 09:55:57,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 34 [2021-07-01 09:55:57,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-07-01 09:55:57,629 INFO L129 PetriNetUnfolder]: 1248/2295 cut-off events. [2021-07-01 09:55:57,629 INFO L130 PetriNetUnfolder]: For 1343/1494 co-relation queries the response was YES. [2021-07-01 09:55:57,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7083 conditions, 2295 events. 1248/2295 cut-off events. For 1343/1494 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13465 event pairs, 74 based on Foata normal form. 62/2352 useless extension candidates. Maximal degree in co-relation 7066. Up to 859 conditions per place. [2021-07-01 09:55:57,643 INFO L132 encePairwiseOnDemand]: 22/34 looper letters, 23 selfloop transitions, 57 changer transitions 1/98 dead transitions. [2021-07-01 09:55:57,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 98 transitions, 671 flow [2021-07-01 09:55:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-01 09:55:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-07-01 09:55:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2021-07-01 09:55:57,648 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9117647058823529 [2021-07-01 09:55:57,649 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 155 transitions. [2021-07-01 09:55:57,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 155 transitions. [2021-07-01 09:55:57,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-07-01 09:55:57,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 155 transitions. [2021-07-01 09:55:57,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2021-07-01 09:55:57,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2021-07-01 09:55:57,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2021-07-01 09:55:57,653 INFO L185 Difference]: Start difference. First operand has 45 places, 44 transitions, 205 flow. Second operand 5 states and 155 transitions. [2021-07-01 09:55:57,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 98 transitions, 671 flow [2021-07-01 09:55:57,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 98 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-07-01 09:55:57,659 INFO L241 Difference]: Finished difference. Result has 52 places, 89 transitions, 726 flow [2021-07-01 09:55:57,659 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=726, PETRI_PLACES=52, PETRI_TRANSITIONS=89} [2021-07-01 09:55:57,659 INFO L335 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2021-07-01 09:55:57,659 INFO L482 AbstractCegarLoop]: Abstraction has has 52 places, 89 transitions, 726 flow [2021-07-01 09:55:57,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2021-07-01 09:55:57,659 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-07-01 09:55:57,659 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:55:57,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-01 09:55:57,659 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:55:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:55:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1612382478, now seen corresponding path program 1 times [2021-07-01 09:55:57,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:55:57,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216195993] [2021-07-01 09:55:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:55:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:55:57,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,707 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:57,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:55:57,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:55:57,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216195993] [2021-07-01 09:55:57,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216195993] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:55:57,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:55:57,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-01 09:55:57,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96091653] [2021-07-01 09:55:57,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-01 09:55:57,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:55:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-01 09:55:57,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-01 09:55:57,726 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 34 [2021-07-01 09:55:57,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 89 transitions, 726 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2021-07-01 09:55:57,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-07-01 09:55:57,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 34 [2021-07-01 09:55:57,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-07-01 09:55:58,083 INFO L129 PetriNetUnfolder]: 2059/3759 cut-off events. [2021-07-01 09:55:58,083 INFO L130 PetriNetUnfolder]: For 5830/6311 co-relation queries the response was YES. [2021-07-01 09:55:58,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16358 conditions, 3759 events. 2059/3759 cut-off events. For 5830/6311 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 22858 event pairs, 65 based on Foata normal form. 79/3833 useless extension candidates. Maximal degree in co-relation 16336. Up to 1440 conditions per place. [2021-07-01 09:55:58,184 INFO L132 encePairwiseOnDemand]: 22/34 looper letters, 36 selfloop transitions, 165 changer transitions 1/219 dead transitions. [2021-07-01 09:55:58,185 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 219 transitions, 2326 flow [2021-07-01 09:55:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-01 09:55:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-07-01 09:55:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-07-01 09:55:58,186 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9215686274509803 [2021-07-01 09:55:58,186 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-07-01 09:55:58,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-07-01 09:55:58,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-07-01 09:55:58,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-07-01 09:55:58,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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) [2021-07-01 09:55:58,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2021-07-01 09:55:58,189 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2021-07-01 09:55:58,189 INFO L185 Difference]: Start difference. First operand has 52 places, 89 transitions, 726 flow. Second operand 6 states and 188 transitions. [2021-07-01 09:55:58,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 219 transitions, 2326 flow [2021-07-01 09:55:58,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 219 transitions, 2276 flow, removed 25 selfloop flow, removed 0 redundant places. [2021-07-01 09:55:58,205 INFO L241 Difference]: Finished difference. Result has 62 places, 209 transitions, 2512 flow [2021-07-01 09:55:58,205 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2512, PETRI_PLACES=62, PETRI_TRANSITIONS=209} [2021-07-01 09:55:58,205 INFO L335 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2021-07-01 09:55:58,205 INFO L482 AbstractCegarLoop]: Abstraction has has 62 places, 209 transitions, 2512 flow [2021-07-01 09:55:58,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2021-07-01 09:55:58,206 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-07-01 09:55:58,206 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:55:58,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-01 09:55:58,206 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:55:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:55:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash 462635036, now seen corresponding path program 1 times [2021-07-01 09:55:58,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:55:58,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91828698] [2021-07-01 09:55:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:55:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:55:58,222 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,232 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:55:58,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 09:55:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:55:58,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:55:58,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91828698] [2021-07-01 09:55:58,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91828698] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:55:58,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:55:58,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-01 09:55:58,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538823414] [2021-07-01 09:55:58,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-01 09:55:58,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:55:58,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-01 09:55:58,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-01 09:55:58,247 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 34 [2021-07-01 09:55:58,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 209 transitions, 2512 flow. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 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) [2021-07-01 09:55:58,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-07-01 09:55:58,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 34 [2021-07-01 09:55:58,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-07-01 09:55:58,750 INFO L129 PetriNetUnfolder]: 2010/3708 cut-off events. [2021-07-01 09:55:58,750 INFO L130 PetriNetUnfolder]: For 11406/12402 co-relation queries the response was YES. [2021-07-01 09:55:58,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20457 conditions, 3708 events. 2010/3708 cut-off events. For 11406/12402 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 22575 event pairs, 20 based on Foata normal form. 112/3815 useless extension candidates. Maximal degree in co-relation 20428. Up to 1320 conditions per place. [2021-07-01 09:55:58,769 INFO L132 encePairwiseOnDemand]: 23/34 looper letters, 0 selfloop transitions, 0 changer transitions 493/493 dead transitions. [2021-07-01 09:55:58,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 493 transitions, 7032 flow [2021-07-01 09:55:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-01 09:55:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-07-01 09:55:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2021-07-01 09:55:58,770 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.865546218487395 [2021-07-01 09:55:58,770 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 206 transitions. [2021-07-01 09:55:58,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 206 transitions. [2021-07-01 09:55:58,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-07-01 09:55:58,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 206 transitions. [2021-07-01 09:55:58,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 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) [2021-07-01 09:55:58,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2021-07-01 09:55:58,771 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2021-07-01 09:55:58,771 INFO L185 Difference]: Start difference. First operand has 62 places, 209 transitions, 2512 flow. Second operand 7 states and 206 transitions. [2021-07-01 09:55:58,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 493 transitions, 7032 flow [2021-07-01 09:55:58,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 493 transitions, 6105 flow, removed 81 selfloop flow, removed 5 redundant places. [2021-07-01 09:55:58,803 INFO L241 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2021-07-01 09:55:58,803 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2021-07-01 09:55:58,803 INFO L335 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2021-07-01 09:55:58,803 INFO L482 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2021-07-01 09:55:58,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 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) [2021-07-01 09:55:58,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-01 09:55:58,804 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadWithAssertThread1of1ForFork1 was SAFE (2/2) [2021-07-01 09:55:58,804 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-01 09:55:58,807 INFO L202 PluginConnector]: Adding new model bluetooth-customized04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 09:55:58 BasicIcfg [2021-07-01 09:55:58,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-01 09:55:58,809 INFO L168 Benchmark]: Toolchain (without parser) took 2538.00 ms. Allocated memory was 184.5 MB in the beginning and 251.7 MB in the end (delta: 67.1 MB). Free memory was 163.7 MB in the beginning and 153.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 139.8 MB. Max. memory is 8.0 GB. [2021-07-01 09:55:58,810 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 184.5 MB. Free memory is still 164.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-01 09:55:58,810 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.11 ms. Allocated memory is still 184.5 MB. Free memory was 163.5 MB in the beginning and 161.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-01 09:55:58,811 INFO L168 Benchmark]: Boogie Preprocessor took 14.79 ms. Allocated memory is still 184.5 MB. Free memory was 161.8 MB in the beginning and 160.9 MB in the end (delta: 880.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-01 09:55:58,815 INFO L168 Benchmark]: RCFGBuilder took 311.56 ms. Allocated memory is still 184.5 MB. Free memory was 160.7 MB in the beginning and 146.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-01 09:55:58,815 INFO L168 Benchmark]: TraceAbstraction took 2177.03 ms. Allocated memory was 184.5 MB in the beginning and 251.7 MB in the end (delta: 67.1 MB). Free memory was 146.1 MB in the beginning and 153.4 MB in the end (delta: -7.4 MB). Peak memory consumption was 122.0 MB. Max. memory is 8.0 GB. [2021-07-01 09:55:58,818 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 0.14 ms. Allocated memory is still 184.5 MB. Free memory is still 164.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 30.11 ms. Allocated memory is still 184.5 MB. Free memory was 163.5 MB in the beginning and 161.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.79 ms. Allocated memory is still 184.5 MB. Free memory was 161.8 MB in the beginning and 160.9 MB in the end (delta: 880.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.56 ms. Allocated memory is still 184.5 MB. Free memory was 160.7 MB in the beginning and 146.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2177.03 ms. Allocated memory was 184.5 MB in the beginning and 251.7 MB in the end (delta: 67.1 MB). Free memory was 146.1 MB in the beginning and 153.4 MB in the end (delta: -7.4 MB). Peak memory consumption was 122.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 50 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 48.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 44.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, 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: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadWithAssertThread1of1ForFork1 with 1 thread instances CFG has 9 procedures, 50 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1989.7ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1634.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 17 SDslu, 0 SDs, 0 SdLazy, 244 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 205.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2512occurred in iteration=4, InterpolantAutomatonStates: 25, 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: 10.4ms SsaConstructionTime, 35.3ms SatisfiabilityAnalysisTime, 159.0ms InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 165 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...