/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/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 21:14:23,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 21:14:23,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 21:14:23,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 21:14:23,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 21:14:23,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 21:14:23,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 21:14:23,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 21:14:23,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 21:14:23,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 21:14:23,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 21:14:23,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 21:14:23,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 21:14:23,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 21:14:23,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 21:14:23,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 21:14:23,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 21:14:23,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 21:14:23,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 21:14:23,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 21:14:23,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 21:14:23,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 21:14:23,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 21:14:23,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 21:14:23,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 21:14:23,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 21:14:23,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 21:14:23,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 21:14:23,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 21:14:23,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 21:14:23,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 21:14:23,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 21:14:23,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 21:14:23,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 21:14:23,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 21:14:23,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 21:14:23,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 21:14:23,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 21:14:23,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 21:14:23,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 21:14:23,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 21:14:23,750 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 [2022-09-20 21:14:23,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 21:14:23,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 21:14:23,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 21:14:23,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 21:14:23,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 21:14:23,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 21:14:23,778 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 21:14:23,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 21:14:23,779 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 21:14:23,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 21:14:23,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 21:14:23,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 21:14:23,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 21:14:23,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:14:23,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 21:14:23,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 21:14:23,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 21:14:23,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 21:14:23,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 21:14:23,782 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 21:14:23,782 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 21:14:23,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 21:14:23,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 21:14:23,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 21:14:23,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 21:14:23,997 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 21:14:23,999 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 21:14:23,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2022-09-20 21:14:24,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/021382ec3/60da37eba40b4147a2de68212f114bbc/FLAG4d08d52bf [2022-09-20 21:14:24,420 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 21:14:24,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2022-09-20 21:14:24,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/021382ec3/60da37eba40b4147a2de68212f114bbc/FLAG4d08d52bf [2022-09-20 21:14:24,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/021382ec3/60da37eba40b4147a2de68212f114bbc [2022-09-20 21:14:24,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 21:14:24,832 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 21:14:24,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 21:14:24,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 21:14:24,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 21:14:24,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:14:24" (1/1) ... [2022-09-20 21:14:24,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db4f29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:24, skipping insertion in model container [2022-09-20 21:14:24,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:14:24" (1/1) ... [2022-09-20 21:14:24,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 21:14:24,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 21:14:25,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-09-20 21:14:25,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:14:25,037 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 21:14:25,050 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-09-20 21:14:25,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:14:25,062 INFO L208 MainTranslator]: Completed translation [2022-09-20 21:14:25,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25 WrapperNode [2022-09-20 21:14:25,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 21:14:25,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 21:14:25,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 21:14:25,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 21:14:25,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,097 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 200 [2022-09-20 21:14:25,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 21:14:25,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 21:14:25,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 21:14:25,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 21:14:25,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 21:14:25,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 21:14:25,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 21:14:25,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 21:14:25,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (1/1) ... [2022-09-20 21:14:25,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:14:25,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:25,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-09-20 21:14:25,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-09-20 21:14:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 21:14:25,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 21:14:25,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-20 21:14:25,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 21:14:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-20 21:14:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 21:14:25,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 21:14:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 21:14:25,175 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 21:14:25,231 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 21:14:25,232 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 21:14:25,509 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 21:14:25,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 21:14:25,632 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-09-20 21:14:25,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:14:25 BoogieIcfgContainer [2022-09-20 21:14:25,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 21:14:25,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 21:14:25,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 21:14:25,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 21:14:25,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 09:14:24" (1/3) ... [2022-09-20 21:14:25,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b09193e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:14:25, skipping insertion in model container [2022-09-20 21:14:25,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:14:25" (2/3) ... [2022-09-20 21:14:25,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b09193e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:14:25, skipping insertion in model container [2022-09-20 21:14:25,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:14:25" (3/3) ... [2022-09-20 21:14:25,640 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-09-20 21:14:25,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 21:14:25,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 21:14:25,652 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 21:14:25,712 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-20 21:14:25,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 156 transitions, 336 flow [2022-09-20 21:14:25,784 INFO L130 PetriNetUnfolder]: 12/153 cut-off events. [2022-09-20 21:14:25,784 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 21:14:25,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 12/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 99 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2022-09-20 21:14:25,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 156 transitions, 336 flow [2022-09-20 21:14:25,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 302 flow [2022-09-20 21:14:25,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 21:14:25,804 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c05092b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 21:14:25,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-09-20 21:14:25,822 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2022-09-20 21:14:25,822 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 21:14:25,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:25,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:25,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash -227615430, now seen corresponding path program 1 times [2022-09-20 21:14:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:25,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902427916] [2022-09-20 21:14:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:25,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:26,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902427916] [2022-09-20 21:14:26,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902427916] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:14:26,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:14:26,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 21:14:26,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173101067] [2022-09-20 21:14:26,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 21:14:26,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 21:14:26,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 21:14:26,077 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 156 [2022-09-20 21:14:26,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 142 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 142.0) internal successors, (284), 2 states have internal predecessors, (284), 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) [2022-09-20 21:14:26,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:26,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 156 [2022-09-20 21:14:26,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:26,164 INFO L130 PetriNetUnfolder]: 41/279 cut-off events. [2022-09-20 21:14:26,165 INFO L131 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-09-20 21:14:26,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 279 events. 41/279 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 814 event pairs, 15 based on Foata normal form. 39/288 useless extension candidates. Maximal degree in co-relation 229. Up to 59 conditions per place. [2022-09-20 21:14:26,170 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 9 selfloop transitions, 0 changer transitions 4/134 dead transitions. [2022-09-20 21:14:26,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 134 transitions, 304 flow [2022-09-20 21:14:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 21:14:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 21:14:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2022-09-20 21:14:26,182 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9391025641025641 [2022-09-20 21:14:26,183 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2022-09-20 21:14:26,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2022-09-20 21:14:26,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:26,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2022-09-20 21:14:26,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 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) [2022-09-20 21:14:26,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2022-09-20 21:14:26,196 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2022-09-20 21:14:26,197 INFO L175 Difference]: Start difference. First operand has 140 places, 142 transitions, 302 flow. Second operand 2 states and 293 transitions. [2022-09-20 21:14:26,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 134 transitions, 304 flow [2022-09-20 21:14:26,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-09-20 21:14:26,207 INFO L231 Difference]: Finished difference. Result has 135 places, 130 transitions, 266 flow [2022-09-20 21:14:26,208 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=266, PETRI_PLACES=135, PETRI_TRANSITIONS=130} [2022-09-20 21:14:26,211 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, -5 predicate places. [2022-09-20 21:14:26,211 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 130 transitions, 266 flow [2022-09-20 21:14:26,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 142.0) internal successors, (284), 2 states have internal predecessors, (284), 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) [2022-09-20 21:14:26,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:26,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:26,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 21:14:26,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1674272564, now seen corresponding path program 1 times [2022-09-20 21:14:26,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913364351] [2022-09-20 21:14:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:26,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913364351] [2022-09-20 21:14:26,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913364351] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:14:26,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:14:26,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 21:14:26,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425387613] [2022-09-20 21:14:26,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:26,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:14:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:14:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:14:26,461 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 156 [2022-09-20 21:14:26,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 130 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 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) [2022-09-20 21:14:26,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:26,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 156 [2022-09-20 21:14:26,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:26,645 INFO L130 PetriNetUnfolder]: 175/636 cut-off events. [2022-09-20 21:14:26,646 INFO L131 PetriNetUnfolder]: For 39/40 co-relation queries the response was YES. [2022-09-20 21:14:26,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 636 events. 175/636 cut-off events. For 39/40 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3266 event pairs, 63 based on Foata normal form. 1/589 useless extension candidates. Maximal degree in co-relation 938. Up to 132 conditions per place. [2022-09-20 21:14:26,649 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 48 selfloop transitions, 6 changer transitions 4/158 dead transitions. [2022-09-20 21:14:26,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 158 transitions, 447 flow [2022-09-20 21:14:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:14:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:14:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 737 transitions. [2022-09-20 21:14:26,653 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7873931623931624 [2022-09-20 21:14:26,653 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 737 transitions. [2022-09-20 21:14:26,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 737 transitions. [2022-09-20 21:14:26,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:26,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 737 transitions. [2022-09-20 21:14:26,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.83333333333333) internal successors, (737), 6 states have internal predecessors, (737), 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) [2022-09-20 21:14:26,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 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) [2022-09-20 21:14:26,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 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) [2022-09-20 21:14:26,658 INFO L175 Difference]: Start difference. First operand has 135 places, 130 transitions, 266 flow. Second operand 6 states and 737 transitions. [2022-09-20 21:14:26,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 158 transitions, 447 flow [2022-09-20 21:14:26,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 158 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 21:14:26,662 INFO L231 Difference]: Finished difference. Result has 139 places, 134 transitions, 302 flow [2022-09-20 21:14:26,663 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2022-09-20 21:14:26,663 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, -1 predicate places. [2022-09-20 21:14:26,663 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 302 flow [2022-09-20 21:14:26,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 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) [2022-09-20 21:14:26,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:26,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:26,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 21:14:26,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1399034336, now seen corresponding path program 1 times [2022-09-20 21:14:26,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:26,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027547243] [2022-09-20 21:14:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:26,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:26,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:26,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027547243] [2022-09-20 21:14:26,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027547243] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:14:26,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:14:26,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 21:14:26,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804954915] [2022-09-20 21:14:26,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:26,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 21:14:26,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:26,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 21:14:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-09-20 21:14:26,781 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 156 [2022-09-20 21:14:26,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 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) [2022-09-20 21:14:26,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:26,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 156 [2022-09-20 21:14:26,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:27,051 INFO L130 PetriNetUnfolder]: 603/1708 cut-off events. [2022-09-20 21:14:27,052 INFO L131 PetriNetUnfolder]: For 77/83 co-relation queries the response was YES. [2022-09-20 21:14:27,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 1708 events. 603/1708 cut-off events. For 77/83 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11689 event pairs, 312 based on Foata normal form. 0/1472 useless extension candidates. Maximal degree in co-relation 2856. Up to 606 conditions per place. [2022-09-20 21:14:27,065 INFO L137 encePairwiseOnDemand]: 147/156 looper letters, 47 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2022-09-20 21:14:27,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 158 transitions, 468 flow [2022-09-20 21:14:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:14:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:14:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2022-09-20 21:14:27,067 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7884615384615384 [2022-09-20 21:14:27,067 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2022-09-20 21:14:27,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2022-09-20 21:14:27,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:27,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2022-09-20 21:14:27,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 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) [2022-09-20 21:14:27,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 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) [2022-09-20 21:14:27,071 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 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) [2022-09-20 21:14:27,071 INFO L175 Difference]: Start difference. First operand has 139 places, 134 transitions, 302 flow. Second operand 8 states and 984 transitions. [2022-09-20 21:14:27,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 158 transitions, 468 flow [2022-09-20 21:14:27,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 158 transitions, 464 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-09-20 21:14:27,077 INFO L231 Difference]: Finished difference. Result has 145 places, 137 transitions, 334 flow [2022-09-20 21:14:27,078 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2022-09-20 21:14:27,079 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2022-09-20 21:14:27,079 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 334 flow [2022-09-20 21:14:27,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 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) [2022-09-20 21:14:27,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:27,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:27,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 21:14:27,080 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:27,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1499400858, now seen corresponding path program 1 times [2022-09-20 21:14:27,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:27,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940492519] [2022-09-20 21:14:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:27,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:27,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:27,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940492519] [2022-09-20 21:14:27,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940492519] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:14:27,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:14:27,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-09-20 21:14:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326134735] [2022-09-20 21:14:27,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:27,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 21:14:27,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:27,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 21:14:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-09-20 21:14:27,307 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 156 [2022-09-20 21:14:27,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 334 flow. Second operand has 10 states, 10 states have (on average 98.1) internal successors, (981), 10 states have internal predecessors, (981), 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) [2022-09-20 21:14:27,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:27,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 156 [2022-09-20 21:14:27,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:27,847 INFO L130 PetriNetUnfolder]: 1151/2547 cut-off events. [2022-09-20 21:14:27,847 INFO L131 PetriNetUnfolder]: For 295/322 co-relation queries the response was YES. [2022-09-20 21:14:27,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4729 conditions, 2547 events. 1151/2547 cut-off events. For 295/322 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18638 event pairs, 890 based on Foata normal form. 27/2259 useless extension candidates. Maximal degree in co-relation 4720. Up to 1488 conditions per place. [2022-09-20 21:14:27,860 INFO L137 encePairwiseOnDemand]: 144/156 looper letters, 71 selfloop transitions, 11 changer transitions 0/168 dead transitions. [2022-09-20 21:14:27,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 168 transitions, 570 flow [2022-09-20 21:14:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-20 21:14:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-20 21:14:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1117 transitions. [2022-09-20 21:14:27,862 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6509324009324009 [2022-09-20 21:14:27,862 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1117 transitions. [2022-09-20 21:14:27,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1117 transitions. [2022-09-20 21:14:27,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:27,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1117 transitions. [2022-09-20 21:14:27,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 101.54545454545455) internal successors, (1117), 11 states have internal predecessors, (1117), 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) [2022-09-20 21:14:27,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 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) [2022-09-20 21:14:27,868 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 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) [2022-09-20 21:14:27,868 INFO L175 Difference]: Start difference. First operand has 145 places, 137 transitions, 334 flow. Second operand 11 states and 1117 transitions. [2022-09-20 21:14:27,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 168 transitions, 570 flow [2022-09-20 21:14:27,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 168 transitions, 560 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 21:14:27,872 INFO L231 Difference]: Finished difference. Result has 156 places, 141 transitions, 373 flow [2022-09-20 21:14:27,873 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=373, PETRI_PLACES=156, PETRI_TRANSITIONS=141} [2022-09-20 21:14:27,874 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 16 predicate places. [2022-09-20 21:14:27,876 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 141 transitions, 373 flow [2022-09-20 21:14:27,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.1) internal successors, (981), 10 states have internal predecessors, (981), 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) [2022-09-20 21:14:27,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:27,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:27,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 21:14:27,878 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:27,878 INFO L85 PathProgramCache]: Analyzing trace with hash -911657420, now seen corresponding path program 1 times [2022-09-20 21:14:27,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:27,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583674565] [2022-09-20 21:14:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:27,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:28,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:28,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583674565] [2022-09-20 21:14:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583674565] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:14:28,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:14:28,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-09-20 21:14:28,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017139685] [2022-09-20 21:14:28,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:28,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 21:14:28,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 21:14:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-09-20 21:14:28,057 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 156 [2022-09-20 21:14:28,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 141 transitions, 373 flow. Second operand has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 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) [2022-09-20 21:14:28,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:28,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 156 [2022-09-20 21:14:28,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:28,443 INFO L130 PetriNetUnfolder]: 957/2002 cut-off events. [2022-09-20 21:14:28,443 INFO L131 PetriNetUnfolder]: For 426/444 co-relation queries the response was YES. [2022-09-20 21:14:28,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3964 conditions, 2002 events. 957/2002 cut-off events. For 426/444 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13078 event pairs, 551 based on Foata normal form. 18/1826 useless extension candidates. Maximal degree in co-relation 3950. Up to 1109 conditions per place. [2022-09-20 21:14:28,454 INFO L137 encePairwiseOnDemand]: 143/156 looper letters, 53 selfloop transitions, 7 changer transitions 21/167 dead transitions. [2022-09-20 21:14:28,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 167 transitions, 597 flow [2022-09-20 21:14:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-09-20 21:14:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-09-20 21:14:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1220 transitions. [2022-09-20 21:14:28,456 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6517094017094017 [2022-09-20 21:14:28,456 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1220 transitions. [2022-09-20 21:14:28,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1220 transitions. [2022-09-20 21:14:28,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:28,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1220 transitions. [2022-09-20 21:14:28,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:14:28,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 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) [2022-09-20 21:14:28,461 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 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) [2022-09-20 21:14:28,461 INFO L175 Difference]: Start difference. First operand has 156 places, 141 transitions, 373 flow. Second operand 12 states and 1220 transitions. [2022-09-20 21:14:28,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 167 transitions, 597 flow [2022-09-20 21:14:28,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 167 transitions, 584 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-20 21:14:28,464 INFO L231 Difference]: Finished difference. Result has 164 places, 135 transitions, 340 flow [2022-09-20 21:14:28,464 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=340, PETRI_PLACES=164, PETRI_TRANSITIONS=135} [2022-09-20 21:14:28,465 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 24 predicate places. [2022-09-20 21:14:28,465 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 135 transitions, 340 flow [2022-09-20 21:14:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 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) [2022-09-20 21:14:28,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:28,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:28,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 21:14:28,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:28,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:28,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1924719290, now seen corresponding path program 1 times [2022-09-20 21:14:28,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:28,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038992124] [2022-09-20 21:14:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:28,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:28,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:28,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038992124] [2022-09-20 21:14:28,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038992124] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:28,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753907541] [2022-09-20 21:14:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:28,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:28,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 21:14:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:14:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:28,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:29,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753907541] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:29,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:14:29,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-09-20 21:14:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867391096] [2022-09-20 21:14:29,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-20 21:14:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-20 21:14:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:14:29,039 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-09-20 21:14:29,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 135 transitions, 340 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:29,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:29,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-09-20 21:14:29,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:29,618 INFO L130 PetriNetUnfolder]: 1766/3399 cut-off events. [2022-09-20 21:14:29,618 INFO L131 PetriNetUnfolder]: For 946/946 co-relation queries the response was YES. [2022-09-20 21:14:29,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7396 conditions, 3399 events. 1766/3399 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24956 event pairs, 441 based on Foata normal form. 11/3327 useless extension candidates. Maximal degree in co-relation 7380. Up to 793 conditions per place. [2022-09-20 21:14:29,639 INFO L137 encePairwiseOnDemand]: 145/156 looper letters, 78 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2022-09-20 21:14:29,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 191 transitions, 685 flow [2022-09-20 21:14:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-20 21:14:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-20 21:14:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1294 transitions. [2022-09-20 21:14:29,641 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.754079254079254 [2022-09-20 21:14:29,641 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1294 transitions. [2022-09-20 21:14:29,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1294 transitions. [2022-09-20 21:14:29,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:29,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1294 transitions. [2022-09-20 21:14:29,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 117.63636363636364) internal successors, (1294), 11 states have internal predecessors, (1294), 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) [2022-09-20 21:14:29,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 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) [2022-09-20 21:14:29,646 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 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) [2022-09-20 21:14:29,646 INFO L175 Difference]: Start difference. First operand has 164 places, 135 transitions, 340 flow. Second operand 11 states and 1294 transitions. [2022-09-20 21:14:29,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 191 transitions, 685 flow [2022-09-20 21:14:29,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 191 transitions, 624 flow, removed 23 selfloop flow, removed 14 redundant places. [2022-09-20 21:14:29,705 INFO L231 Difference]: Finished difference. Result has 153 places, 147 transitions, 403 flow [2022-09-20 21:14:29,705 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=403, PETRI_PLACES=153, PETRI_TRANSITIONS=147} [2022-09-20 21:14:29,705 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 13 predicate places. [2022-09-20 21:14:29,706 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 147 transitions, 403 flow [2022-09-20 21:14:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:29,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:29,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:29,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 21:14:29,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-09-20 21:14:29,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:29,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1983125562, now seen corresponding path program 2 times [2022-09-20 21:14:29,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:29,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354923750] [2022-09-20 21:14:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:29,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354923750] [2022-09-20 21:14:29,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354923750] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828421408] [2022-09-20 21:14:29,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:14:29,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:29,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:29,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:29,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 21:14:30,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:14:30,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:14:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:14:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:30,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:30,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828421408] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:30,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:14:30,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-09-20 21:14:30,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433520312] [2022-09-20 21:14:30,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:30,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-20 21:14:30,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-20 21:14:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:14:30,384 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-09-20 21:14:30,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 147 transitions, 403 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:30,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:30,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-09-20 21:14:30,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:30,936 INFO L130 PetriNetUnfolder]: 1970/4147 cut-off events. [2022-09-20 21:14:30,936 INFO L131 PetriNetUnfolder]: For 1743/1763 co-relation queries the response was YES. [2022-09-20 21:14:30,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9472 conditions, 4147 events. 1970/4147 cut-off events. For 1743/1763 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32408 event pairs, 357 based on Foata normal form. 9/3851 useless extension candidates. Maximal degree in co-relation 9460. Up to 834 conditions per place. [2022-09-20 21:14:30,964 INFO L137 encePairwiseOnDemand]: 144/156 looper letters, 77 selfloop transitions, 30 changer transitions 0/203 dead transitions. [2022-09-20 21:14:30,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 203 transitions, 813 flow [2022-09-20 21:14:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-20 21:14:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-20 21:14:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1286 transitions. [2022-09-20 21:14:30,967 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7494172494172494 [2022-09-20 21:14:30,967 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1286 transitions. [2022-09-20 21:14:30,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1286 transitions. [2022-09-20 21:14:30,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:30,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1286 transitions. [2022-09-20 21:14:30,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 116.9090909090909) internal successors, (1286), 11 states have internal predecessors, (1286), 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) [2022-09-20 21:14:30,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 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) [2022-09-20 21:14:30,972 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 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) [2022-09-20 21:14:30,972 INFO L175 Difference]: Start difference. First operand has 153 places, 147 transitions, 403 flow. Second operand 11 states and 1286 transitions. [2022-09-20 21:14:30,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 203 transitions, 813 flow [2022-09-20 21:14:30,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 203 transitions, 808 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-20 21:14:30,986 INFO L231 Difference]: Finished difference. Result has 166 places, 165 transitions, 614 flow [2022-09-20 21:14:30,986 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=614, PETRI_PLACES=166, PETRI_TRANSITIONS=165} [2022-09-20 21:14:30,986 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 26 predicate places. [2022-09-20 21:14:30,987 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 165 transitions, 614 flow [2022-09-20 21:14:30,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:30,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:30,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:31,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-09-20 21:14:31,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-09-20 21:14:31,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1636670544, now seen corresponding path program 3 times [2022-09-20 21:14:31,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:31,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643213346] [2022-09-20 21:14:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:31,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:31,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643213346] [2022-09-20 21:14:31,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643213346] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368542298] [2022-09-20 21:14:31,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:14:31,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:31,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:31,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:31,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 21:14:31,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:14:31,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:14:31,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:14:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:31,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:31,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368542298] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:31,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:14:31,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 19 [2022-09-20 21:14:31,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100808444] [2022-09-20 21:14:31,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:31,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-20 21:14:31,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-20 21:14:31,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-09-20 21:14:31,726 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-09-20 21:14:31,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 165 transitions, 614 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:31,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:31,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-09-20 21:14:31,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:32,359 INFO L130 PetriNetUnfolder]: 2477/5212 cut-off events. [2022-09-20 21:14:32,359 INFO L131 PetriNetUnfolder]: For 8046/8182 co-relation queries the response was YES. [2022-09-20 21:14:32,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14957 conditions, 5212 events. 2477/5212 cut-off events. For 8046/8182 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 42826 event pairs, 493 based on Foata normal form. 81/4911 useless extension candidates. Maximal degree in co-relation 14939. Up to 973 conditions per place. [2022-09-20 21:14:32,390 INFO L137 encePairwiseOnDemand]: 143/156 looper letters, 93 selfloop transitions, 47 changer transitions 0/236 dead transitions. [2022-09-20 21:14:32,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 236 transitions, 1234 flow [2022-09-20 21:14:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-20 21:14:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-20 21:14:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1305 transitions. [2022-09-20 21:14:32,392 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7604895104895105 [2022-09-20 21:14:32,392 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1305 transitions. [2022-09-20 21:14:32,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1305 transitions. [2022-09-20 21:14:32,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:32,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1305 transitions. [2022-09-20 21:14:32,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 118.63636363636364) internal successors, (1305), 11 states have internal predecessors, (1305), 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) [2022-09-20 21:14:32,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 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) [2022-09-20 21:14:32,397 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 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) [2022-09-20 21:14:32,397 INFO L175 Difference]: Start difference. First operand has 166 places, 165 transitions, 614 flow. Second operand 11 states and 1305 transitions. [2022-09-20 21:14:32,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 236 transitions, 1234 flow [2022-09-20 21:14:32,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 236 transitions, 1205 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-09-20 21:14:32,447 INFO L231 Difference]: Finished difference. Result has 177 places, 185 transitions, 942 flow [2022-09-20 21:14:32,448 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=942, PETRI_PLACES=177, PETRI_TRANSITIONS=185} [2022-09-20 21:14:32,448 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 37 predicate places. [2022-09-20 21:14:32,448 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 185 transitions, 942 flow [2022-09-20 21:14:32,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:32,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:32,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:32,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-09-20 21:14:32,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:32,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash -530669304, now seen corresponding path program 4 times [2022-09-20 21:14:32,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:32,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398460351] [2022-09-20 21:14:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:32,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398460351] [2022-09-20 21:14:32,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398460351] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746512155] [2022-09-20 21:14:32,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:14:32,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:32,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:32,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 21:14:32,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:14:32,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:14:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:14:32,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:32,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:33,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746512155] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:33,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:14:33,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 19 [2022-09-20 21:14:33,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574961923] [2022-09-20 21:14:33,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:33,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-20 21:14:33,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-20 21:14:33,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-09-20 21:14:33,123 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-09-20 21:14:33,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 185 transitions, 942 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:33,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:33,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-09-20 21:14:33,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:33,868 INFO L130 PetriNetUnfolder]: 2574/5377 cut-off events. [2022-09-20 21:14:33,868 INFO L131 PetriNetUnfolder]: For 14942/15182 co-relation queries the response was YES. [2022-09-20 21:14:33,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17777 conditions, 5377 events. 2574/5377 cut-off events. For 14942/15182 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44063 event pairs, 387 based on Foata normal form. 29/5029 useless extension candidates. Maximal degree in co-relation 17754. Up to 1438 conditions per place. [2022-09-20 21:14:33,934 INFO L137 encePairwiseOnDemand]: 143/156 looper letters, 83 selfloop transitions, 47 changer transitions 0/226 dead transitions. [2022-09-20 21:14:33,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 226 transitions, 1398 flow [2022-09-20 21:14:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-09-20 21:14:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-09-20 21:14:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1179 transitions. [2022-09-20 21:14:33,937 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7557692307692307 [2022-09-20 21:14:33,937 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1179 transitions. [2022-09-20 21:14:33,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1179 transitions. [2022-09-20 21:14:33,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:33,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1179 transitions. [2022-09-20 21:14:33,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.9) internal successors, (1179), 10 states have internal predecessors, (1179), 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) [2022-09-20 21:14:33,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 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) [2022-09-20 21:14:33,941 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 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) [2022-09-20 21:14:33,941 INFO L175 Difference]: Start difference. First operand has 177 places, 185 transitions, 942 flow. Second operand 10 states and 1179 transitions. [2022-09-20 21:14:33,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 226 transitions, 1398 flow [2022-09-20 21:14:34,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 226 transitions, 1347 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-09-20 21:14:34,011 INFO L231 Difference]: Finished difference. Result has 183 places, 192 transitions, 1135 flow [2022-09-20 21:14:34,011 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1135, PETRI_PLACES=183, PETRI_TRANSITIONS=192} [2022-09-20 21:14:34,012 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 43 predicate places. [2022-09-20 21:14:34,012 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 192 transitions, 1135 flow [2022-09-20 21:14:34,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:34,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:34,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:34,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 21:14:34,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:34,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash -669176570, now seen corresponding path program 5 times [2022-09-20 21:14:34,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:34,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267051635] [2022-09-20 21:14:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:34,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:34,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:34,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267051635] [2022-09-20 21:14:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267051635] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693134797] [2022-09-20 21:14:34,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:14:34,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:34,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:34,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:34,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 21:14:34,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:14:34,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:14:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 21:14:34,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:34,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:34,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693134797] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:14:34,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:14:34,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2022-09-20 21:14:34,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706530530] [2022-09-20 21:14:34,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:14:34,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 21:14:34,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 21:14:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-09-20 21:14:34,512 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 156 [2022-09-20 21:14:34,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 192 transitions, 1135 flow. Second operand has 17 states, 17 states have (on average 109.47058823529412) internal successors, (1861), 17 states have internal predecessors, (1861), 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) [2022-09-20 21:14:34,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:34,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 156 [2022-09-20 21:14:34,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:36,003 INFO L130 PetriNetUnfolder]: 5084/9950 cut-off events. [2022-09-20 21:14:36,004 INFO L131 PetriNetUnfolder]: For 35415/35761 co-relation queries the response was YES. [2022-09-20 21:14:36,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34195 conditions, 9950 events. 5084/9950 cut-off events. For 35415/35761 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 83638 event pairs, 531 based on Foata normal form. 45/9485 useless extension candidates. Maximal degree in co-relation 34169. Up to 1065 conditions per place. [2022-09-20 21:14:36,223 INFO L137 encePairwiseOnDemand]: 140/156 looper letters, 237 selfloop transitions, 142 changer transitions 0/472 dead transitions. [2022-09-20 21:14:36,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 472 transitions, 3741 flow [2022-09-20 21:14:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-09-20 21:14:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-09-20 21:14:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2829 transitions. [2022-09-20 21:14:36,229 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7556089743589743 [2022-09-20 21:14:36,229 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2829 transitions. [2022-09-20 21:14:36,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2829 transitions. [2022-09-20 21:14:36,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:36,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2829 transitions. [2022-09-20 21:14:36,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 117.875) internal successors, (2829), 24 states have internal predecessors, (2829), 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) [2022-09-20 21:14:36,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 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) [2022-09-20 21:14:36,259 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 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) [2022-09-20 21:14:36,259 INFO L175 Difference]: Start difference. First operand has 183 places, 192 transitions, 1135 flow. Second operand 24 states and 2829 transitions. [2022-09-20 21:14:36,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 472 transitions, 3741 flow [2022-09-20 21:14:36,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 472 transitions, 3578 flow, removed 30 selfloop flow, removed 6 redundant places. [2022-09-20 21:14:36,417 INFO L231 Difference]: Finished difference. Result has 218 places, 294 transitions, 2746 flow [2022-09-20 21:14:36,418 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2746, PETRI_PLACES=218, PETRI_TRANSITIONS=294} [2022-09-20 21:14:36,419 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 78 predicate places. [2022-09-20 21:14:36,419 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 294 transitions, 2746 flow [2022-09-20 21:14:36,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 109.47058823529412) internal successors, (1861), 17 states have internal predecessors, (1861), 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) [2022-09-20 21:14:36,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:36,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:36,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 21:14:36,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-09-20 21:14:36,636 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:36,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1056755422, now seen corresponding path program 1 times [2022-09-20 21:14:36,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:36,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392742434] [2022-09-20 21:14:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:36,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:36,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:36,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392742434] [2022-09-20 21:14:36,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392742434] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:36,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905049920] [2022-09-20 21:14:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:36,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:36,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:36,720 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:36,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 21:14:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:36,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 21:14:36,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:36,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:37,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905049920] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:37,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:14:37,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-09-20 21:14:37,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247766548] [2022-09-20 21:14:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 21:14:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 21:14:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:14:37,070 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 156 [2022-09-20 21:14:37,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 294 transitions, 2746 flow. Second operand has 7 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 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) [2022-09-20 21:14:37,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:37,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 156 [2022-09-20 21:14:37,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:37,678 INFO L130 PetriNetUnfolder]: 1970/4689 cut-off events. [2022-09-20 21:14:37,678 INFO L131 PetriNetUnfolder]: For 33380/34084 co-relation queries the response was YES. [2022-09-20 21:14:37,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17625 conditions, 4689 events. 1970/4689 cut-off events. For 33380/34084 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 39657 event pairs, 488 based on Foata normal form. 311/4750 useless extension candidates. Maximal degree in co-relation 17582. Up to 1505 conditions per place. [2022-09-20 21:14:37,717 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 103 selfloop transitions, 24 changer transitions 0/331 dead transitions. [2022-09-20 21:14:37,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 331 transitions, 3479 flow [2022-09-20 21:14:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:14:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:14:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 852 transitions. [2022-09-20 21:14:37,719 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-09-20 21:14:37,719 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 852 transitions. [2022-09-20 21:14:37,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 852 transitions. [2022-09-20 21:14:37,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:37,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 852 transitions. [2022-09-20 21:14:37,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 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) [2022-09-20 21:14:37,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 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) [2022-09-20 21:14:37,722 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 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) [2022-09-20 21:14:37,722 INFO L175 Difference]: Start difference. First operand has 218 places, 294 transitions, 2746 flow. Second operand 7 states and 852 transitions. [2022-09-20 21:14:37,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 331 transitions, 3479 flow [2022-09-20 21:14:37,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 331 transitions, 3339 flow, removed 33 selfloop flow, removed 9 redundant places. [2022-09-20 21:14:37,797 INFO L231 Difference]: Finished difference. Result has 216 places, 294 transitions, 2670 flow [2022-09-20 21:14:37,798 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2670, PETRI_PLACES=216, PETRI_TRANSITIONS=294} [2022-09-20 21:14:37,798 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 76 predicate places. [2022-09-20 21:14:37,798 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 294 transitions, 2670 flow [2022-09-20 21:14:37,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 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) [2022-09-20 21:14:37,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:37,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:37,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-09-20 21:14:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:38,015 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash -574922864, now seen corresponding path program 6 times [2022-09-20 21:14:38,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:38,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890865942] [2022-09-20 21:14:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:38,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:38,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:38,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890865942] [2022-09-20 21:14:38,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890865942] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:38,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126613340] [2022-09-20 21:14:38,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:14:38,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:38,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:38,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:38,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 21:14:38,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-09-20 21:14:38,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:14:38,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:14:38,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:38,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:14:38,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126613340] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:38,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:14:38,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-09-20 21:14:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851183143] [2022-09-20 21:14:38,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:14:38,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-20 21:14:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:38,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-20 21:14:38,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-09-20 21:14:38,550 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-09-20 21:14:38,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 294 transitions, 2670 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:38,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:38,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-09-20 21:14:38,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:39,480 INFO L130 PetriNetUnfolder]: 3128/6453 cut-off events. [2022-09-20 21:14:39,481 INFO L131 PetriNetUnfolder]: For 33699/34002 co-relation queries the response was YES. [2022-09-20 21:14:39,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25150 conditions, 6453 events. 3128/6453 cut-off events. For 33699/34002 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 52065 event pairs, 437 based on Foata normal form. 69/6412 useless extension candidates. Maximal degree in co-relation 25110. Up to 1952 conditions per place. [2022-09-20 21:14:39,537 INFO L137 encePairwiseOnDemand]: 144/156 looper letters, 100 selfloop transitions, 118 changer transitions 0/331 dead transitions. [2022-09-20 21:14:39,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 331 transitions, 3271 flow [2022-09-20 21:14:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-09-20 21:14:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-09-20 21:14:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1175 transitions. [2022-09-20 21:14:39,540 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7532051282051282 [2022-09-20 21:14:39,540 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1175 transitions. [2022-09-20 21:14:39,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1175 transitions. [2022-09-20 21:14:39,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:39,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1175 transitions. [2022-09-20 21:14:39,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 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) [2022-09-20 21:14:39,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 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) [2022-09-20 21:14:39,544 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 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) [2022-09-20 21:14:39,544 INFO L175 Difference]: Start difference. First operand has 216 places, 294 transitions, 2670 flow. Second operand 10 states and 1175 transitions. [2022-09-20 21:14:39,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 331 transitions, 3271 flow [2022-09-20 21:14:39,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 331 transitions, 3240 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-20 21:14:39,716 INFO L231 Difference]: Finished difference. Result has 223 places, 296 transitions, 3074 flow [2022-09-20 21:14:39,716 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3074, PETRI_PLACES=223, PETRI_TRANSITIONS=296} [2022-09-20 21:14:39,717 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 83 predicate places. [2022-09-20 21:14:39,717 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 296 transitions, 3074 flow [2022-09-20 21:14:39,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 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) [2022-09-20 21:14:39,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:39,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:39,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 21:14:39,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:39,931 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1579631014, now seen corresponding path program 1 times [2022-09-20 21:14:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:39,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991783704] [2022-09-20 21:14:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:40,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:40,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991783704] [2022-09-20 21:14:40,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991783704] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:40,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645331993] [2022-09-20 21:14:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:40,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:40,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:40,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:40,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 21:14:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 65 conjunts are in the unsatisfiable core [2022-09-20 21:14:40,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:41,213 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:14:41,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-09-20 21:14:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:41,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:41,587 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:14:41,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-09-20 21:14:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:42,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645331993] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:14:42,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:14:42,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 22] total 50 [2022-09-20 21:14:42,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643924853] [2022-09-20 21:14:42,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:14:42,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-09-20 21:14:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:42,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-09-20 21:14:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2126, Unknown=0, NotChecked=0, Total=2450 [2022-09-20 21:14:42,140 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 156 [2022-09-20 21:14:42,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 296 transitions, 3074 flow. Second operand has 50 states, 50 states have (on average 74.7) internal successors, (3735), 50 states have internal predecessors, (3735), 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) [2022-09-20 21:14:42,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:42,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 156 [2022-09-20 21:14:42,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:14:49,221 INFO L130 PetriNetUnfolder]: 22616/40403 cut-off events. [2022-09-20 21:14:49,221 INFO L131 PetriNetUnfolder]: For 244131/245316 co-relation queries the response was YES. [2022-09-20 21:14:49,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150807 conditions, 40403 events. 22616/40403 cut-off events. For 244131/245316 co-relation queries the response was YES. Maximal size of possible extension queue 2074. Compared 383585 event pairs, 1966 based on Foata normal form. 478/40515 useless extension candidates. Maximal degree in co-relation 150764. Up to 14579 conditions per place. [2022-09-20 21:14:49,822 INFO L137 encePairwiseOnDemand]: 117/156 looper letters, 520 selfloop transitions, 317 changer transitions 6/972 dead transitions. [2022-09-20 21:14:49,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 972 transitions, 10390 flow [2022-09-20 21:14:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-09-20 21:14:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-09-20 21:14:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3721 transitions. [2022-09-20 21:14:49,827 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5185340022296544 [2022-09-20 21:14:49,827 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3721 transitions. [2022-09-20 21:14:49,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3721 transitions. [2022-09-20 21:14:49,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:14:49,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3721 transitions. [2022-09-20 21:14:49,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 80.8913043478261) internal successors, (3721), 46 states have internal predecessors, (3721), 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) [2022-09-20 21:14:49,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 156.0) internal successors, (7332), 47 states have internal predecessors, (7332), 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) [2022-09-20 21:14:49,839 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 156.0) internal successors, (7332), 47 states have internal predecessors, (7332), 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) [2022-09-20 21:14:49,839 INFO L175 Difference]: Start difference. First operand has 223 places, 296 transitions, 3074 flow. Second operand 46 states and 3721 transitions. [2022-09-20 21:14:49,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 972 transitions, 10390 flow [2022-09-20 21:14:51,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 972 transitions, 10232 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-09-20 21:14:51,978 INFO L231 Difference]: Finished difference. Result has 290 places, 598 transitions, 7801 flow [2022-09-20 21:14:51,978 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=7801, PETRI_PLACES=290, PETRI_TRANSITIONS=598} [2022-09-20 21:14:51,978 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 150 predicate places. [2022-09-20 21:14:51,978 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 598 transitions, 7801 flow [2022-09-20 21:14:51,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 74.7) internal successors, (3735), 50 states have internal predecessors, (3735), 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) [2022-09-20 21:14:51,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:14:51,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:14:51,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-20 21:14:52,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-09-20 21:14:52,194 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:14:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:14:52,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1627264302, now seen corresponding path program 2 times [2022-09-20 21:14:52,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:14:52,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883856474] [2022-09-20 21:14:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:14:52,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:14:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:14:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:52,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:14:52,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883856474] [2022-09-20 21:14:52,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883856474] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:14:52,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000478012] [2022-09-20 21:14:52,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:14:52,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:14:52,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:14:52,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:14:52,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 21:14:52,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:14:52,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:14:52,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 74 conjunts are in the unsatisfiable core [2022-09-20 21:14:52,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:14:53,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-09-20 21:14:53,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 21:14:53,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 21:14:53,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 21:14:53,999 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:14:53,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-09-20 21:14:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:14:54,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:14:54,721 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_363 (Array Int Int))) (or (< 0 ~M~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_363) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4)))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-09-20 21:14:54,781 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_362 (Array Int Int)) (v_ArrVal_363 (Array Int Int))) (or (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_362) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_363) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4)))))) (< 0 ~M~0) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-09-20 21:14:54,825 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_362 (Array Int Int)) (v_ArrVal_361 (Array Int Int)) (v_ArrVal_363 (Array Int Int))) (or (< 0 ~M~0) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_361) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_362) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_363) c_~A~0.base))) (= (+ c_~res1~0 (select .cse0 c_~A~0.offset)) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4)))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-09-20 21:14:54,904 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_362 (Array Int Int)) (v_ArrVal_361 (Array Int Int)) (v_ArrVal_363 (Array Int Int))) (or (< 0 ~M~0) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_361) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_362) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_#t~ret12#1.base|))) (= (+ (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret12#1.offset| (* ~M~0 4))) c_~res2~0) (+ c_~res1~0 (select .cse0 |c_ULTIMATE.start_main_#t~ret12#1.offset|)))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-09-20 21:14:54,920 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_362 (Array Int Int)) (v_ArrVal_361 (Array Int Int)) (v_ArrVal_363 (Array Int Int))) (or (< 0 ~M~0) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_361) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_362) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (= (+ c_~res2~0 (select .cse0 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))) (+ (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) c_~res1~0))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-09-20 21:14:54,929 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_362 (Array Int Int)) (v_ArrVal_361 (Array Int Int)) (v_ArrVal_363 (Array Int Int))) (or (< 0 ~M~0) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_361) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_362) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (= (+ c_~res1~0 (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ (select .cse0 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~res2~0))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-09-20 21:14:54,968 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:14:54,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-09-20 21:14:54,975 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:14:54,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 194 [2022-09-20 21:14:54,982 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:14:54,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 162 [2022-09-20 21:14:54,989 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:14:54,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 146 [2022-09-20 21:14:54,999 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:14:54,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 75 [2022-09-20 21:14:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-09-20 21:14:55,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000478012] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:14:55,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:14:55,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33, 27] total 75 [2022-09-20 21:14:55,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996166963] [2022-09-20 21:14:55,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:14:55,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-09-20 21:14:55,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:14:55,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-09-20 21:14:55,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=4069, Unknown=6, NotChecked=834, Total=5550 [2022-09-20 21:14:55,486 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 156 [2022-09-20 21:14:55,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 598 transitions, 7801 flow. Second operand has 75 states, 75 states have (on average 57.72) internal successors, (4329), 75 states have internal predecessors, (4329), 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) [2022-09-20 21:14:55,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:14:55,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 156 [2022-09-20 21:14:55,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:15:42,697 INFO L130 PetriNetUnfolder]: 91742/148958 cut-off events. [2022-09-20 21:15:42,698 INFO L131 PetriNetUnfolder]: For 1147889/1148416 co-relation queries the response was YES. [2022-09-20 21:15:45,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685070 conditions, 148958 events. 91742/148958 cut-off events. For 1147889/1148416 co-relation queries the response was YES. Maximal size of possible extension queue 7180. Compared 1474729 event pairs, 10327 based on Foata normal form. 106/148733 useless extension candidates. Maximal degree in co-relation 685001. Up to 39693 conditions per place. [2022-09-20 21:15:46,173 INFO L137 encePairwiseOnDemand]: 105/156 looper letters, 3045 selfloop transitions, 2490 changer transitions 13/5596 dead transitions. [2022-09-20 21:15:46,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 5596 transitions, 75941 flow [2022-09-20 21:15:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-09-20 21:15:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2022-09-20 21:15:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 17736 transitions. [2022-09-20 21:15:46,223 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.41798642533936653 [2022-09-20 21:15:46,223 INFO L72 ComplementDD]: Start complementDD. Operand 272 states and 17736 transitions. [2022-09-20 21:15:46,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 17736 transitions. [2022-09-20 21:15:46,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:15:46,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 272 states and 17736 transitions. [2022-09-20 21:15:46,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 273 states, 272 states have (on average 65.20588235294117) internal successors, (17736), 272 states have internal predecessors, (17736), 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) [2022-09-20 21:15:46,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 273 states, 273 states have (on average 156.0) internal successors, (42588), 273 states have internal predecessors, (42588), 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) [2022-09-20 21:15:46,315 INFO L81 ComplementDD]: Finished complementDD. Result has 273 states, 273 states have (on average 156.0) internal successors, (42588), 273 states have internal predecessors, (42588), 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) [2022-09-20 21:15:46,315 INFO L175 Difference]: Start difference. First operand has 290 places, 598 transitions, 7801 flow. Second operand 272 states and 17736 transitions. [2022-09-20 21:15:46,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 5596 transitions, 75941 flow [2022-09-20 21:16:23,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 5596 transitions, 75273 flow, removed 326 selfloop flow, removed 10 redundant places. [2022-09-20 21:16:23,746 INFO L231 Difference]: Finished difference. Result has 704 places, 3105 transitions, 53234 flow [2022-09-20 21:16:23,747 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=7679, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=272, PETRI_FLOW=53234, PETRI_PLACES=704, PETRI_TRANSITIONS=3105} [2022-09-20 21:16:23,747 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 564 predicate places. [2022-09-20 21:16:23,747 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 3105 transitions, 53234 flow [2022-09-20 21:16:23,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 57.72) internal successors, (4329), 75 states have internal predecessors, (4329), 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) [2022-09-20 21:16:23,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:16:23,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:16:23,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 21:16:23,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-09-20 21:16:23,989 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:16:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:16:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2128684588, now seen corresponding path program 3 times [2022-09-20 21:16:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:16:23,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582051286] [2022-09-20 21:16:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:16:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:16:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:16:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:16:24,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:16:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582051286] [2022-09-20 21:16:24,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582051286] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:16:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142764496] [2022-09-20 21:16:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:16:24,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:16:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:16:24,704 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:16:24,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 21:16:24,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:16:24,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:16:24,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 74 conjunts are in the unsatisfiable core [2022-09-20 21:16:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:16:24,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 21:16:24,956 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-20 21:16:24,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-09-20 21:16:25,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:16:25,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-09-20 21:16:25,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-09-20 21:16:25,661 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:16:25,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-09-20 21:16:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:16:25,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:16:26,484 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:16:26,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 92 [2022-09-20 21:16:26,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2022-09-20 21:16:26,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-09-20 21:16:27,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-09-20 21:16:27,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-09-20 21:16:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:16:27,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142764496] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:16:27,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:16:27,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 27] total 69 [2022-09-20 21:16:27,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384376759] [2022-09-20 21:16:27,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:16:27,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-09-20 21:16:27,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:16:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-09-20 21:16:27,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=4262, Unknown=5, NotChecked=0, Total=4692 [2022-09-20 21:16:27,199 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 156 [2022-09-20 21:16:27,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 3105 transitions, 53234 flow. Second operand has 69 states, 69 states have (on average 61.73913043478261) internal successors, (4260), 69 states have internal predecessors, (4260), 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) [2022-09-20 21:16:27,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:16:27,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 156 [2022-09-20 21:16:27,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand