/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-send-receive.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 23:32:22,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 23:32:22,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 23:32:22,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 23:32:22,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 23:32:22,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 23:32:22,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 23:32:22,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 23:32:22,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 23:32:22,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 23:32:22,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 23:32:22,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 23:32:22,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 23:32:22,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 23:32:22,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 23:32:22,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 23:32:22,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 23:32:22,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 23:32:22,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 23:32:22,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 23:32:22,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 23:32:22,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 23:32:22,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 23:32:22,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 23:32:22,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 23:32:22,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 23:32:22,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 23:32:22,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 23:32:22,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 23:32:22,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 23:32:22,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 23:32:22,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 23:32:22,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 23:32:22,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 23:32:22,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 23:32:22,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 23:32:22,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 23:32:22,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 23:32:22,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 23:32:22,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 23:32:22,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 23:32:22,386 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 23:32:22,418 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 23:32:22,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 23:32:22,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 23:32:22,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 23:32:22,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 23:32:22,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 23:32:22,420 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 23:32:22,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 23:32:22,420 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 23:32:22,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 23:32:22,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 23:32:22,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:32:22,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 23:32:22,422 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 23:32:22,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 23:32:22,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 23:32:22,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 23:32:22,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 23:32:22,597 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 23:32:22,598 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 23:32:22,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2022-09-20 23:32:22,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfbd77381/ebae26e892e741fa872a8373784d663d/FLAGe551f41c5 [2022-09-20 23:32:23,047 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 23:32:23,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2022-09-20 23:32:23,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfbd77381/ebae26e892e741fa872a8373784d663d/FLAGe551f41c5 [2022-09-20 23:32:23,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfbd77381/ebae26e892e741fa872a8373784d663d [2022-09-20 23:32:23,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 23:32:23,070 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 23:32:23,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 23:32:23,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 23:32:23,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 23:32:23,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76568529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23, skipping insertion in model container [2022-09-20 23:32:23,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 23:32:23,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 23:32:23,263 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-send-receive.wvr.c[3107,3120] [2022-09-20 23:32:23,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:32:23,282 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 23:32:23,298 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-send-receive.wvr.c[3107,3120] [2022-09-20 23:32:23,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:32:23,314 INFO L208 MainTranslator]: Completed translation [2022-09-20 23:32:23,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23 WrapperNode [2022-09-20 23:32:23,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 23:32:23,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 23:32:23,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 23:32:23,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 23:32:23,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,346 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 161 [2022-09-20 23:32:23,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 23:32:23,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 23:32:23,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 23:32:23,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 23:32:23,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 23:32:23,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 23:32:23,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 23:32:23,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 23:32:23,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (1/1) ... [2022-09-20 23:32:23,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:32:23,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:23,400 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 23:32:23,407 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 23:32:23,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 23:32:23,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 23:32:23,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-20 23:32:23,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 23:32:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-20 23:32:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 23:32:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 23:32:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 23:32:23,432 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 23:32:23,486 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 23:32:23,487 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 23:32:23,706 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 23:32:23,774 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 23:32:23,774 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-09-20 23:32:23,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:32:23 BoogieIcfgContainer [2022-09-20 23:32:23,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 23:32:23,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 23:32:23,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 23:32:23,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 23:32:23,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:32:23" (1/3) ... [2022-09-20 23:32:23,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496e6c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:32:23, skipping insertion in model container [2022-09-20 23:32:23,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:32:23" (2/3) ... [2022-09-20 23:32:23,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496e6c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:32:23, skipping insertion in model container [2022-09-20 23:32:23,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:32:23" (3/3) ... [2022-09-20 23:32:23,784 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-09-20 23:32:23,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 23:32:23,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 23:32:23,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 23:32:23,874 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-20 23:32:23,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 142 transitions, 308 flow [2022-09-20 23:32:23,987 INFO L130 PetriNetUnfolder]: 10/139 cut-off events. [2022-09-20 23:32:23,987 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 23:32:23,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 10/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2022-09-20 23:32:23,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 142 transitions, 308 flow [2022-09-20 23:32:23,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 128 transitions, 274 flow [2022-09-20 23:32:24,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:32:24,015 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;@1ad96db2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:32:24,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-09-20 23:32:24,054 INFO L130 PetriNetUnfolder]: 10/127 cut-off events. [2022-09-20 23:32:24,054 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 23:32:24,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:24,054 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] [2022-09-20 23:32:24,055 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 23:32:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:24,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1861212041, now seen corresponding path program 1 times [2022-09-20 23:32:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:24,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696640355] [2022-09-20 23:32:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:24,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:24,262 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 23:32:24,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696640355] [2022-09-20 23:32:24,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696640355] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:32:24,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:32:24,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 23:32:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756968019] [2022-09-20 23:32:24,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:32:24,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 23:32:24,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 23:32:24,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 23:32:24,297 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 142 [2022-09-20 23:32:24,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 130.0) internal successors, (260), 2 states have internal predecessors, (260), 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 23:32:24,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:24,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 142 [2022-09-20 23:32:24,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:24,337 INFO L130 PetriNetUnfolder]: 21/174 cut-off events. [2022-09-20 23:32:24,337 INFO L131 PetriNetUnfolder]: For 26/27 co-relation queries the response was YES. [2022-09-20 23:32:24,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 174 events. 21/174 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 7 based on Foata normal form. 20/176 useless extension candidates. Maximal degree in co-relation 141. Up to 33 conditions per place. [2022-09-20 23:32:24,339 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 9 selfloop transitions, 0 changer transitions 2/122 dead transitions. [2022-09-20 23:32:24,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 122 transitions, 280 flow [2022-09-20 23:32:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 23:32:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 23:32:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 267 transitions. [2022-09-20 23:32:24,348 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9401408450704225 [2022-09-20 23:32:24,349 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 267 transitions. [2022-09-20 23:32:24,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 267 transitions. [2022-09-20 23:32:24,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:24,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 267 transitions. [2022-09-20 23:32:24,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.5) internal successors, (267), 2 states have internal predecessors, (267), 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 23:32:24,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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 23:32:24,356 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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 23:32:24,357 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 274 flow. Second operand 2 states and 267 transitions. [2022-09-20 23:32:24,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 122 transitions, 280 flow [2022-09-20 23:32:24,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 122 transitions, 268 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-09-20 23:32:24,362 INFO L231 Difference]: Finished difference. Result has 123 places, 120 transitions, 246 flow [2022-09-20 23:32:24,363 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=123, PETRI_TRANSITIONS=120} [2022-09-20 23:32:24,366 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, -5 predicate places. [2022-09-20 23:32:24,366 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 120 transitions, 246 flow [2022-09-20 23:32:24,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 130.0) internal successors, (260), 2 states have internal predecessors, (260), 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 23:32:24,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:24,366 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] [2022-09-20 23:32:24,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 23:32:24,367 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 23:32:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash -166607127, now seen corresponding path program 1 times [2022-09-20 23:32:24,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:24,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852639953] [2022-09-20 23:32:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:24,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:24,517 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 23:32:24,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:24,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852639953] [2022-09-20 23:32:24,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852639953] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:32:24,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:32:24,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 23:32:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70091263] [2022-09-20 23:32:24,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:32:24,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 23:32:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 23:32:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 23:32:24,522 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 142 [2022-09-20 23:32:24,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 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 23:32:24,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:24,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 142 [2022-09-20 23:32:24,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:24,719 INFO L130 PetriNetUnfolder]: 156/593 cut-off events. [2022-09-20 23:32:24,720 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-09-20 23:32:24,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 593 events. 156/593 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3136 event pairs, 8 based on Foata normal form. 0/535 useless extension candidates. Maximal degree in co-relation 866. Up to 79 conditions per place. [2022-09-20 23:32:24,726 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 41 selfloop transitions, 9 changer transitions 4/155 dead transitions. [2022-09-20 23:32:24,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 155 transitions, 433 flow [2022-09-20 23:32:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 23:32:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 23:32:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 985 transitions. [2022-09-20 23:32:24,732 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8670774647887324 [2022-09-20 23:32:24,732 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 985 transitions. [2022-09-20 23:32:24,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 985 transitions. [2022-09-20 23:32:24,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:24,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 985 transitions. [2022-09-20 23:32:24,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.125) internal successors, (985), 8 states have internal predecessors, (985), 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 23:32:24,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 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 23:32:24,740 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 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 23:32:24,740 INFO L175 Difference]: Start difference. First operand has 123 places, 120 transitions, 246 flow. Second operand 8 states and 985 transitions. [2022-09-20 23:32:24,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 155 transitions, 433 flow [2022-09-20 23:32:24,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 155 transitions, 433 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:32:24,745 INFO L231 Difference]: Finished difference. Result has 132 places, 126 transitions, 300 flow [2022-09-20 23:32:24,745 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=300, PETRI_PLACES=132, PETRI_TRANSITIONS=126} [2022-09-20 23:32:24,746 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 4 predicate places. [2022-09-20 23:32:24,746 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 126 transitions, 300 flow [2022-09-20 23:32:24,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 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 23:32:24,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:24,747 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] [2022-09-20 23:32:24,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 23:32:24,747 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 23:32:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1487505590, now seen corresponding path program 1 times [2022-09-20 23:32:24,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306978267] [2022-09-20 23:32:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:24,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:24,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:24,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306978267] [2022-09-20 23:32:24,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306978267] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:32:24,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535537286] [2022-09-20 23:32:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:24,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:24,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:24,869 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 23:32:24,875 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 23:32:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:24,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 23:32:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:32:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:25,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:32:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:25,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535537286] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:32:25,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:32:25,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2022-09-20 23:32:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59072201] [2022-09-20 23:32:25,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:32:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-20 23:32:25,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-20 23:32:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-09-20 23:32:25,141 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 142 [2022-09-20 23:32:25,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 126 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 120.25) internal successors, (962), 8 states have internal predecessors, (962), 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 23:32:25,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:25,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 142 [2022-09-20 23:32:25,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:25,251 INFO L130 PetriNetUnfolder]: 148/534 cut-off events. [2022-09-20 23:32:25,252 INFO L131 PetriNetUnfolder]: For 149/155 co-relation queries the response was YES. [2022-09-20 23:32:25,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952 conditions, 534 events. 148/534 cut-off events. For 149/155 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2600 event pairs, 35 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 944. Up to 102 conditions per place. [2022-09-20 23:32:25,254 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 36 selfloop transitions, 5 changer transitions 9/152 dead transitions. [2022-09-20 23:32:25,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 152 transitions, 484 flow [2022-09-20 23:32:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 23:32:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 23:32:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 865 transitions. [2022-09-20 23:32:25,256 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8702213279678068 [2022-09-20 23:32:25,256 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 865 transitions. [2022-09-20 23:32:25,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 865 transitions. [2022-09-20 23:32:25,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:25,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 865 transitions. [2022-09-20 23:32:25,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.57142857142857) internal successors, (865), 7 states have internal predecessors, (865), 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 23:32:25,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 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 23:32:25,260 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 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 23:32:25,260 INFO L175 Difference]: Start difference. First operand has 132 places, 126 transitions, 300 flow. Second operand 7 states and 865 transitions. [2022-09-20 23:32:25,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 152 transitions, 484 flow [2022-09-20 23:32:25,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 152 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 23:32:25,263 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 327 flow [2022-09-20 23:32:25,263 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2022-09-20 23:32:25,264 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 13 predicate places. [2022-09-20 23:32:25,264 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 327 flow [2022-09-20 23:32:25,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.25) internal successors, (962), 8 states have internal predecessors, (962), 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 23:32:25,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:25,265 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] [2022-09-20 23:32:25,282 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 23:32:25,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:25,482 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 23:32:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1173957422, now seen corresponding path program 2 times [2022-09-20 23:32:25,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:25,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372849603] [2022-09-20 23:32:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:25,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:25,613 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 23:32:25,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372849603] [2022-09-20 23:32:25,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372849603] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:32:25,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:32:25,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 23:32:25,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612363951] [2022-09-20 23:32:25,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:32:25,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 23:32:25,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 23:32:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 23:32:25,615 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 142 [2022-09-20 23:32:25,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 327 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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 23:32:25,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:25,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 142 [2022-09-20 23:32:25,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:25,671 INFO L130 PetriNetUnfolder]: 37/271 cut-off events. [2022-09-20 23:32:25,671 INFO L131 PetriNetUnfolder]: For 100/101 co-relation queries the response was YES. [2022-09-20 23:32:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 271 events. 37/271 cut-off events. For 100/101 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 757 event pairs, 6 based on Foata normal form. 8/256 useless extension candidates. Maximal degree in co-relation 437. Up to 56 conditions per place. [2022-09-20 23:32:25,673 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 17 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2022-09-20 23:32:25,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 127 transitions, 358 flow [2022-09-20 23:32:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 23:32:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 23:32:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2022-09-20 23:32:25,676 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8826291079812206 [2022-09-20 23:32:25,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2022-09-20 23:32:25,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2022-09-20 23:32:25,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:25,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2022-09-20 23:32:25,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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 23:32:25,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 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 23:32:25,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 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 23:32:25,685 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 327 flow. Second operand 3 states and 376 transitions. [2022-09-20 23:32:25,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 127 transitions, 358 flow [2022-09-20 23:32:25,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 127 transitions, 347 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-09-20 23:32:25,689 INFO L231 Difference]: Finished difference. Result has 136 places, 125 transitions, 319 flow [2022-09-20 23:32:25,689 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=136, PETRI_TRANSITIONS=125} [2022-09-20 23:32:25,691 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 8 predicate places. [2022-09-20 23:32:25,692 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 125 transitions, 319 flow [2022-09-20 23:32:25,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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 23:32:25,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:25,693 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] [2022-09-20 23:32:25,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 23:32:25,693 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 23:32:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash -476736070, now seen corresponding path program 1 times [2022-09-20 23:32:25,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:25,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380889500] [2022-09-20 23:32:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:25,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:25,777 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 23:32:25,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380889500] [2022-09-20 23:32:25,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380889500] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:32:25,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:32:25,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 23:32:25,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370645661] [2022-09-20 23:32:25,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:32:25,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 23:32:25,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 23:32:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 23:32:25,781 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 142 [2022-09-20 23:32:25,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 125 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 23:32:25,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:25,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 142 [2022-09-20 23:32:25,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:25,848 INFO L130 PetriNetUnfolder]: 59/312 cut-off events. [2022-09-20 23:32:25,848 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-09-20 23:32:25,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 312 events. 59/312 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1044 event pairs, 15 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 561. Up to 89 conditions per place. [2022-09-20 23:32:25,850 INFO L137 encePairwiseOnDemand]: 139/142 looper letters, 19 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2022-09-20 23:32:25,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 130 transitions, 380 flow [2022-09-20 23:32:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 23:32:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 23:32:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2022-09-20 23:32:25,851 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9061032863849765 [2022-09-20 23:32:25,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2022-09-20 23:32:25,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2022-09-20 23:32:25,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:25,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2022-09-20 23:32:25,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 23:32:25,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 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 23:32:25,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 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 23:32:25,853 INFO L175 Difference]: Start difference. First operand has 136 places, 125 transitions, 319 flow. Second operand 3 states and 386 transitions. [2022-09-20 23:32:25,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 130 transitions, 380 flow [2022-09-20 23:32:25,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 130 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 23:32:25,857 INFO L231 Difference]: Finished difference. Result has 138 places, 125 transitions, 322 flow [2022-09-20 23:32:25,857 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=138, PETRI_TRANSITIONS=125} [2022-09-20 23:32:25,859 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 10 predicate places. [2022-09-20 23:32:25,859 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 125 transitions, 322 flow [2022-09-20 23:32:25,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 23:32:25,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:25,860 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] [2022-09-20 23:32:25,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 23:32:25,860 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 23:32:25,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1063375576, now seen corresponding path program 1 times [2022-09-20 23:32:25,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:25,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450096719] [2022-09-20 23:32:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:25,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:26,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450096719] [2022-09-20 23:32:26,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450096719] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:32:26,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:32:26,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-09-20 23:32:26,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065127687] [2022-09-20 23:32:26,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:32:26,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 23:32:26,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 23:32:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-09-20 23:32:26,043 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2022-09-20 23:32:26,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 125 transitions, 322 flow. Second operand has 10 states, 10 states have (on average 105.6) internal successors, (1056), 10 states have internal predecessors, (1056), 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 23:32:26,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:26,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2022-09-20 23:32:26,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:26,301 INFO L130 PetriNetUnfolder]: 95/503 cut-off events. [2022-09-20 23:32:26,301 INFO L131 PetriNetUnfolder]: For 309/311 co-relation queries the response was YES. [2022-09-20 23:32:26,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 503 events. 95/503 cut-off events. For 309/311 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2352 event pairs, 18 based on Foata normal form. 16/501 useless extension candidates. Maximal degree in co-relation 1030. Up to 103 conditions per place. [2022-09-20 23:32:26,304 INFO L137 encePairwiseOnDemand]: 132/142 looper letters, 38 selfloop transitions, 6 changer transitions 22/157 dead transitions. [2022-09-20 23:32:26,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 157 transitions, 535 flow [2022-09-20 23:32:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-09-20 23:32:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-09-20 23:32:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1095 transitions. [2022-09-20 23:32:26,307 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7711267605633803 [2022-09-20 23:32:26,307 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1095 transitions. [2022-09-20 23:32:26,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1095 transitions. [2022-09-20 23:32:26,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:26,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1095 transitions. [2022-09-20 23:32:26,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 109.5) internal successors, (1095), 10 states have internal predecessors, (1095), 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 23:32:26,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 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 23:32:26,311 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 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 23:32:26,311 INFO L175 Difference]: Start difference. First operand has 138 places, 125 transitions, 322 flow. Second operand 10 states and 1095 transitions. [2022-09-20 23:32:26,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 157 transitions, 535 flow [2022-09-20 23:32:26,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 157 transitions, 533 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 23:32:26,314 INFO L231 Difference]: Finished difference. Result has 150 places, 125 transitions, 344 flow [2022-09-20 23:32:26,314 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=344, PETRI_PLACES=150, PETRI_TRANSITIONS=125} [2022-09-20 23:32:26,316 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 22 predicate places. [2022-09-20 23:32:26,317 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 125 transitions, 344 flow [2022-09-20 23:32:26,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.6) internal successors, (1056), 10 states have internal predecessors, (1056), 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 23:32:26,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:26,317 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] [2022-09-20 23:32:26,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 23:32:26,318 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 23:32:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:26,318 INFO L85 PathProgramCache]: Analyzing trace with hash -921526571, now seen corresponding path program 1 times [2022-09-20 23:32:26,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:26,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088730988] [2022-09-20 23:32:26,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:26,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:32:26,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:26,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088730988] [2022-09-20 23:32:26,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088730988] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:32:26,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911456771] [2022-09-20 23:32:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:26,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:26,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:26,520 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 23:32:26,521 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 23:32:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:26,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 60 conjunts are in the unsatisfiable core [2022-09-20 23:32:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:32:26,663 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 23:32:26,687 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-09-20 23:32:26,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2022-09-20 23:32:26,714 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-09-20 23:32:26,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2022-09-20 23:32:27,067 INFO L356 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-09-20 23:32:27,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 30 [2022-09-20 23:32:27,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-09-20 23:32:27,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 23:32:27,452 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 23:32:27,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 23:32:27,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-09-20 23:32:27,705 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 23:32:27,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:32:28,024 WARN L833 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_138 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_138) c_~queue~0.base))) (or (not (= (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (<= (+ c_~sum~0 (select .cse0 (+ c_~queue~0.offset (* c_~front~0 4)))) 1)))) (forall ((v_ArrVal_138 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_138) c_~queue~0.base))) (or (not (= (select .cse1 (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (<= 0 (+ c_~sum~0 (select .cse1 (+ c_~queue~0.offset (* c_~front~0 4))))))))) (<= c_~n~0 c_~front~0) (= (mod |c_thread2Thread1of1ForFork2_~b~0#1| 256) 0) (< c_~front~0 0)) is different from false [2022-09-20 23:32:28,937 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:28,938 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 68 treesize of output 56 [2022-09-20 23:32:28,949 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:28,949 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 2636 treesize of output 2524 [2022-09-20 23:32:28,972 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:28,972 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 1866 treesize of output 1786 [2022-09-20 23:32:28,990 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:28,991 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 2412 treesize of output 2236 [2022-09-20 23:32:29,012 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:29,012 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 2220 treesize of output 1852 [2022-09-20 23:32:30,312 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:30,312 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 68 treesize of output 56 [2022-09-20 23:32:30,326 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-09-20 23:32:30,326 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 644 treesize of output 616 [2022-09-20 23:32:30,338 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-09-20 23:32:30,339 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 612 treesize of output 520 [2022-09-20 23:32:30,350 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-09-20 23:32:30,351 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 516 treesize of output 472 [2022-09-20 23:32:30,362 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-09-20 23:32:30,363 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 468 treesize of output 448 [2022-09-20 23:32:30,366 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-09-20 23:32:33,250 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 23:32:33,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911456771] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:32:33,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:32:33,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 26] total 55 [2022-09-20 23:32:33,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92923793] [2022-09-20 23:32:33,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:32:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-09-20 23:32:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:33,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-09-20 23:32:33,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=2148, Unknown=112, NotChecked=104, Total=2970 [2022-09-20 23:32:33,255 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2022-09-20 23:32:33,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 125 transitions, 344 flow. Second operand has 55 states, 55 states have (on average 63.018181818181816) internal successors, (3466), 55 states have internal predecessors, (3466), 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 23:32:33,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:33,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2022-09-20 23:32:33,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:37,699 INFO L130 PetriNetUnfolder]: 3937/7821 cut-off events. [2022-09-20 23:32:37,699 INFO L131 PetriNetUnfolder]: For 6579/6579 co-relation queries the response was YES. [2022-09-20 23:32:37,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21008 conditions, 7821 events. 3937/7821 cut-off events. For 6579/6579 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62496 event pairs, 232 based on Foata normal form. 274/7960 useless extension candidates. Maximal degree in co-relation 20991. Up to 838 conditions per place. [2022-09-20 23:32:37,743 INFO L137 encePairwiseOnDemand]: 107/142 looper letters, 381 selfloop transitions, 131 changer transitions 29/591 dead transitions. [2022-09-20 23:32:37,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 591 transitions, 3144 flow [2022-09-20 23:32:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-09-20 23:32:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-09-20 23:32:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4605 transitions. [2022-09-20 23:32:37,753 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4769055509527755 [2022-09-20 23:32:37,753 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4605 transitions. [2022-09-20 23:32:37,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4605 transitions. [2022-09-20 23:32:37,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:37,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4605 transitions. [2022-09-20 23:32:37,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 67.72058823529412) internal successors, (4605), 68 states have internal predecessors, (4605), 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 23:32:37,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 142.0) internal successors, (9798), 69 states have internal predecessors, (9798), 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 23:32:37,782 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 142.0) internal successors, (9798), 69 states have internal predecessors, (9798), 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 23:32:37,782 INFO L175 Difference]: Start difference. First operand has 150 places, 125 transitions, 344 flow. Second operand 68 states and 4605 transitions. [2022-09-20 23:32:37,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 591 transitions, 3144 flow [2022-09-20 23:32:37,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 591 transitions, 3074 flow, removed 27 selfloop flow, removed 7 redundant places. [2022-09-20 23:32:37,811 INFO L231 Difference]: Finished difference. Result has 235 places, 257 transitions, 1437 flow [2022-09-20 23:32:37,812 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=1437, PETRI_PLACES=235, PETRI_TRANSITIONS=257} [2022-09-20 23:32:37,812 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 107 predicate places. [2022-09-20 23:32:37,812 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 257 transitions, 1437 flow [2022-09-20 23:32:37,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 63.018181818181816) internal successors, (3466), 55 states have internal predecessors, (3466), 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 23:32:37,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:37,814 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] [2022-09-20 23:32:37,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 23:32:38,024 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 23:32:38,024 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 23:32:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1818539553, now seen corresponding path program 2 times [2022-09-20 23:32:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:38,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502947241] [2022-09-20 23:32:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:32:38,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502947241] [2022-09-20 23:32:38,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502947241] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:32:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509610567] [2022-09-20 23:32:38,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:32:38,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:38,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:38,236 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 23:32:38,247 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 23:32:38,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:32:38,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:32:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 55 conjunts are in the unsatisfiable core [2022-09-20 23:32:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:32:38,776 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 15 treesize of output 11 [2022-09-20 23:32:39,069 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 23:32:39,142 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 23:32:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:32:39,315 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 18 treesize of output 20 [2022-09-20 23:32:39,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-09-20 23:32:39,462 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 23:32:39,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:32:39,587 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (< c_~front~0 0) (and (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))))) is different from false [2022-09-20 23:32:39,694 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (= (mod |c_thread2Thread1of1ForFork2_~b~0#1| 256) 0) (< c_~front~0 0) (and (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))))) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))) is different from false [2022-09-20 23:32:39,838 WARN L833 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))))) (forall ((v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 1))))) (<= c_~n~0 c_~front~0) (< c_~front~0 0)) is different from false [2022-09-20 23:32:39,923 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))))))) (< c_~front~0 0)) is different from false [2022-09-20 23:32:39,980 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (< c_~front~0 0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|)) 1)))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|))))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|)) 1)))))) is different from false [2022-09-20 23:32:40,040 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) 1)))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))))))) (< c_~front~0 0)) is different from false [2022-09-20 23:32:40,060 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 1))))) (< c_~front~0 0)) is different from false [2022-09-20 23:32:40,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:40,336 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 65 treesize of output 53 [2022-09-20 23:32:40,345 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:40,345 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 1504 treesize of output 1440 [2022-09-20 23:32:40,359 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:40,360 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 782 treesize of output 738 [2022-09-20 23:32:40,371 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:40,372 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 1364 treesize of output 1260 [2022-09-20 23:32:40,382 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 1142 treesize of output 950 [2022-09-20 23:32:41,551 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:41,551 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 65 treesize of output 53 [2022-09-20 23:32:41,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:32:41,559 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-09-20 23:32:41,559 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 148 treesize of output 136 [2022-09-20 23:32:41,566 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-09-20 23:32:41,566 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 132 treesize of output 112 [2022-09-20 23:32:41,574 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-09-20 23:32:41,574 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 83 treesize of output 75 [2022-09-20 23:32:41,599 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-09-20 23:32:42,191 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 23:32:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509610567] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:32:42,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:32:42,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26, 25] total 59 [2022-09-20 23:32:42,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625488465] [2022-09-20 23:32:42,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:32:42,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-09-20 23:32:42,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-09-20 23:32:42,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2342, Unknown=31, NotChecked=742, Total=3422 [2022-09-20 23:32:42,197 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2022-09-20 23:32:42,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 257 transitions, 1437 flow. Second operand has 59 states, 59 states have (on average 62.932203389830505) internal successors, (3713), 59 states have internal predecessors, (3713), 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 23:32:42,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:42,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2022-09-20 23:32:42,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:48,390 INFO L130 PetriNetUnfolder]: 5359/10557 cut-off events. [2022-09-20 23:32:48,390 INFO L131 PetriNetUnfolder]: For 67601/67773 co-relation queries the response was YES. [2022-09-20 23:32:48,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37348 conditions, 10557 events. 5359/10557 cut-off events. For 67601/67773 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 87131 event pairs, 315 based on Foata normal form. 304/10763 useless extension candidates. Maximal degree in co-relation 37304. Up to 1122 conditions per place. [2022-09-20 23:32:48,478 INFO L137 encePairwiseOnDemand]: 106/142 looper letters, 431 selfloop transitions, 177 changer transitions 133/791 dead transitions. [2022-09-20 23:32:48,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 791 transitions, 6336 flow [2022-09-20 23:32:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-09-20 23:32:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-09-20 23:32:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4451 transitions. [2022-09-20 23:32:48,484 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.47492530943235167 [2022-09-20 23:32:48,484 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4451 transitions. [2022-09-20 23:32:48,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4451 transitions. [2022-09-20 23:32:48,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:48,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4451 transitions. [2022-09-20 23:32:48,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 67.43939393939394) internal successors, (4451), 66 states have internal predecessors, (4451), 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 23:32:48,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 142.0) internal successors, (9514), 67 states have internal predecessors, (9514), 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 23:32:48,499 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 142.0) internal successors, (9514), 67 states have internal predecessors, (9514), 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 23:32:48,499 INFO L175 Difference]: Start difference. First operand has 235 places, 257 transitions, 1437 flow. Second operand 66 states and 4451 transitions. [2022-09-20 23:32:48,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 791 transitions, 6336 flow [2022-09-20 23:32:48,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 791 transitions, 5772 flow, removed 195 selfloop flow, removed 20 redundant places. [2022-09-20 23:32:48,852 INFO L231 Difference]: Finished difference. Result has 304 places, 339 transitions, 2506 flow [2022-09-20 23:32:48,852 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2506, PETRI_PLACES=304, PETRI_TRANSITIONS=339} [2022-09-20 23:32:48,852 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 176 predicate places. [2022-09-20 23:32:48,853 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 339 transitions, 2506 flow [2022-09-20 23:32:48,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 62.932203389830505) internal successors, (3713), 59 states have internal predecessors, (3713), 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 23:32:48,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:48,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:48,873 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 23:32:49,067 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 23:32:49,067 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 23:32:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:49,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1136609108, now seen corresponding path program 3 times [2022-09-20 23:32:49,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:49,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366848815] [2022-09-20 23:32:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:49,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:32:49,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:49,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366848815] [2022-09-20 23:32:49,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366848815] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:32:49,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:32:49,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 23:32:49,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283978864] [2022-09-20 23:32:49,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:32:49,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 23:32:49,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 23:32:49,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-09-20 23:32:49,112 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2022-09-20 23:32:49,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 339 transitions, 2506 flow. Second operand has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 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 23:32:49,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:49,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2022-09-20 23:32:49,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:49,656 INFO L130 PetriNetUnfolder]: 909/3319 cut-off events. [2022-09-20 23:32:49,656 INFO L131 PetriNetUnfolder]: For 41805/42200 co-relation queries the response was YES. [2022-09-20 23:32:49,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13171 conditions, 3319 events. 909/3319 cut-off events. For 41805/42200 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27611 event pairs, 88 based on Foata normal form. 122/3323 useless extension candidates. Maximal degree in co-relation 13105. Up to 731 conditions per place. [2022-09-20 23:32:49,694 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 139 selfloop transitions, 97 changer transitions 0/441 dead transitions. [2022-09-20 23:32:49,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 441 transitions, 3909 flow [2022-09-20 23:32:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 23:32:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 23:32:49,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2022-09-20 23:32:49,695 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9049295774647887 [2022-09-20 23:32:49,696 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2022-09-20 23:32:49,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2022-09-20 23:32:49,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:49,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2022-09-20 23:32:49,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 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 23:32:49,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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 23:32:49,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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 23:32:49,702 INFO L175 Difference]: Start difference. First operand has 304 places, 339 transitions, 2506 flow. Second operand 4 states and 514 transitions. [2022-09-20 23:32:49,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 441 transitions, 3909 flow [2022-09-20 23:32:49,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 441 transitions, 3506 flow, removed 144 selfloop flow, removed 40 redundant places. [2022-09-20 23:32:49,777 INFO L231 Difference]: Finished difference. Result has 269 places, 431 transitions, 3587 flow [2022-09-20 23:32:49,777 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3587, PETRI_PLACES=269, PETRI_TRANSITIONS=431} [2022-09-20 23:32:49,778 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 141 predicate places. [2022-09-20 23:32:49,778 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 431 transitions, 3587 flow [2022-09-20 23:32:49,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 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 23:32:49,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:49,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:49,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-09-20 23:32:49,778 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 23:32:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:49,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1683242476, now seen corresponding path program 4 times [2022-09-20 23:32:49,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:49,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776830433] [2022-09-20 23:32:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-09-20 23:32:49,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776830433] [2022-09-20 23:32:49,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776830433] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:32:49,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:32:49,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 23:32:49,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677037309] [2022-09-20 23:32:49,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:32:49,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 23:32:49,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 23:32:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 23:32:49,830 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 142 [2022-09-20 23:32:49,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 431 transitions, 3587 flow. Second operand has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 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 23:32:49,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:49,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 142 [2022-09-20 23:32:49,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:50,603 INFO L130 PetriNetUnfolder]: 1137/4757 cut-off events. [2022-09-20 23:32:50,603 INFO L131 PetriNetUnfolder]: For 42756/43244 co-relation queries the response was YES. [2022-09-20 23:32:50,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18079 conditions, 4757 events. 1137/4757 cut-off events. For 42756/43244 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 44511 event pairs, 146 based on Foata normal form. 224/4849 useless extension candidates. Maximal degree in co-relation 18016. Up to 986 conditions per place. [2022-09-20 23:32:50,671 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 265 selfloop transitions, 6 changer transitions 0/454 dead transitions. [2022-09-20 23:32:50,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 454 transitions, 4326 flow [2022-09-20 23:32:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 23:32:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 23:32:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 510 transitions. [2022-09-20 23:32:50,673 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.897887323943662 [2022-09-20 23:32:50,673 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 510 transitions. [2022-09-20 23:32:50,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 510 transitions. [2022-09-20 23:32:50,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:50,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 510 transitions. [2022-09-20 23:32:50,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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 23:32:50,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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 23:32:50,674 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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 23:32:50,674 INFO L175 Difference]: Start difference. First operand has 269 places, 431 transitions, 3587 flow. Second operand 4 states and 510 transitions. [2022-09-20 23:32:50,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 454 transitions, 4326 flow [2022-09-20 23:32:50,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 454 transitions, 4240 flow, removed 43 selfloop flow, removed 0 redundant places. [2022-09-20 23:32:50,905 INFO L231 Difference]: Finished difference. Result has 274 places, 410 transitions, 3288 flow [2022-09-20 23:32:50,906 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3288, PETRI_PLACES=274, PETRI_TRANSITIONS=410} [2022-09-20 23:32:50,908 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 146 predicate places. [2022-09-20 23:32:50,908 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 410 transitions, 3288 flow [2022-09-20 23:32:50,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 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 23:32:50,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:50,908 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:50,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-09-20 23:32:50,909 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 23:32:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1975215260, now seen corresponding path program 1 times [2022-09-20 23:32:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:50,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200289239] [2022-09-20 23:32:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:32:51,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:51,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200289239] [2022-09-20 23:32:51,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200289239] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:32:51,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987061128] [2022-09-20 23:32:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:51,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:51,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:51,104 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 23:32:51,117 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 23:32:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2022-09-20 23:32:51,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:32:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:51,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:32:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987061128] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:32:51,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:32:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2022-09-20 23:32:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245563151] [2022-09-20 23:32:51,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:32:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-09-20 23:32:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-09-20 23:32:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-09-20 23:32:52,003 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 142 [2022-09-20 23:32:52,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 410 transitions, 3288 flow. Second operand has 31 states, 31 states have (on average 104.96774193548387) internal successors, (3254), 31 states have internal predecessors, (3254), 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 23:32:52,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:52,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 142 [2022-09-20 23:32:52,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:53,080 INFO L130 PetriNetUnfolder]: 878/3151 cut-off events. [2022-09-20 23:32:53,081 INFO L131 PetriNetUnfolder]: For 26340/26578 co-relation queries the response was YES. [2022-09-20 23:32:53,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12250 conditions, 3151 events. 878/3151 cut-off events. For 26340/26578 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 25213 event pairs, 241 based on Foata normal form. 46/3109 useless extension candidates. Maximal degree in co-relation 12184. Up to 1306 conditions per place. [2022-09-20 23:32:53,124 INFO L137 encePairwiseOnDemand]: 125/142 looper letters, 128 selfloop transitions, 15 changer transitions 47/322 dead transitions. [2022-09-20 23:32:53,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 322 transitions, 2549 flow [2022-09-20 23:32:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-09-20 23:32:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-09-20 23:32:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2422 transitions. [2022-09-20 23:32:53,127 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.741579914268218 [2022-09-20 23:32:53,127 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2422 transitions. [2022-09-20 23:32:53,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2422 transitions. [2022-09-20 23:32:53,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:53,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2422 transitions. [2022-09-20 23:32:53,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 105.30434782608695) internal successors, (2422), 23 states have internal predecessors, (2422), 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 23:32:53,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 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 23:32:53,133 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 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 23:32:53,133 INFO L175 Difference]: Start difference. First operand has 274 places, 410 transitions, 3288 flow. Second operand 23 states and 2422 transitions. [2022-09-20 23:32:53,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 322 transitions, 2549 flow [2022-09-20 23:32:53,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 322 transitions, 2441 flow, removed 49 selfloop flow, removed 15 redundant places. [2022-09-20 23:32:53,194 INFO L231 Difference]: Finished difference. Result has 267 places, 266 transitions, 1874 flow [2022-09-20 23:32:53,194 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1874, PETRI_PLACES=267, PETRI_TRANSITIONS=266} [2022-09-20 23:32:53,194 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 139 predicate places. [2022-09-20 23:32:53,194 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 266 transitions, 1874 flow [2022-09-20 23:32:53,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 104.96774193548387) internal successors, (3254), 31 states have internal predecessors, (3254), 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 23:32:53,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:53,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:53,217 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 23:32:53,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:53,410 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 23:32:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1638300587, now seen corresponding path program 2 times [2022-09-20 23:32:53,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:53,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509203416] [2022-09-20 23:32:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:53,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509203416] [2022-09-20 23:32:54,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509203416] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:32:54,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116745454] [2022-09-20 23:32:54,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:32:54,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:54,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:54,436 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 23:32:54,437 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 23:32:54,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:32:54,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:32:54,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 59 conjunts are in the unsatisfiable core [2022-09-20 23:32:54,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:32:55,285 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 23:32:55,285 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 48 treesize of output 14 [2022-09-20 23:32:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:55,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:32:55,732 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-09-20 23:32:55,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 62 [2022-09-20 23:32:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:56,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116745454] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:32:56,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:32:56,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 20, 19] total 64 [2022-09-20 23:32:56,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637215692] [2022-09-20 23:32:56,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:32:56,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-09-20 23:32:56,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:56,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-09-20 23:32:56,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2022-09-20 23:32:56,861 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2022-09-20 23:32:56,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 266 transitions, 1874 flow. Second operand has 64 states, 64 states have (on average 59.609375) internal successors, (3815), 64 states have internal predecessors, (3815), 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 23:32:56,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:56,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2022-09-20 23:32:56,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:33:30,272 INFO L130 PetriNetUnfolder]: 41515/81947 cut-off events. [2022-09-20 23:33:30,273 INFO L131 PetriNetUnfolder]: For 645841/645841 co-relation queries the response was YES. [2022-09-20 23:33:31,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339267 conditions, 81947 events. 41515/81947 cut-off events. For 645841/645841 co-relation queries the response was YES. Maximal size of possible extension queue 2138. Compared 860775 event pairs, 4828 based on Foata normal form. 3035/84501 useless extension candidates. Maximal degree in co-relation 339204. Up to 10237 conditions per place. [2022-09-20 23:33:32,382 INFO L137 encePairwiseOnDemand]: 100/142 looper letters, 1443 selfloop transitions, 780 changer transitions 872/3142 dead transitions. [2022-09-20 23:33:32,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 3142 transitions, 31844 flow [2022-09-20 23:33:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2022-09-20 23:33:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2022-09-20 23:33:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 14343 transitions. [2022-09-20 23:33:32,397 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4570454400611816 [2022-09-20 23:33:32,397 INFO L72 ComplementDD]: Start complementDD. Operand 221 states and 14343 transitions. [2022-09-20 23:33:32,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 14343 transitions. [2022-09-20 23:33:32,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:33:32,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 221 states and 14343 transitions. [2022-09-20 23:33:32,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 222 states, 221 states have (on average 64.90045248868778) internal successors, (14343), 221 states have internal predecessors, (14343), 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 23:33:32,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 222 states, 222 states have (on average 142.0) internal successors, (31524), 222 states have internal predecessors, (31524), 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 23:33:32,456 INFO L81 ComplementDD]: Finished complementDD. Result has 222 states, 222 states have (on average 142.0) internal successors, (31524), 222 states have internal predecessors, (31524), 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 23:33:32,456 INFO L175 Difference]: Start difference. First operand has 267 places, 266 transitions, 1874 flow. Second operand 221 states and 14343 transitions. [2022-09-20 23:33:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 3142 transitions, 31844 flow [2022-09-20 23:33:36,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 3142 transitions, 29275 flow, removed 1248 selfloop flow, removed 30 redundant places. [2022-09-20 23:33:36,142 INFO L231 Difference]: Finished difference. Result has 506 places, 943 transitions, 10723 flow [2022-09-20 23:33:36,142 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=221, PETRI_FLOW=10723, PETRI_PLACES=506, PETRI_TRANSITIONS=943} [2022-09-20 23:33:36,142 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 378 predicate places. [2022-09-20 23:33:36,143 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 943 transitions, 10723 flow [2022-09-20 23:33:36,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 59.609375) internal successors, (3815), 64 states have internal predecessors, (3815), 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 23:33:36,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:33:36,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:33:36,161 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 23:33:36,361 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,SelfDestructingSolverStorable11 [2022-09-20 23:33:36,361 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 23:33:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:33:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash 129315831, now seen corresponding path program 3 times [2022-09-20 23:33:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:33:36,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875858571] [2022-09-20 23:33:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:33:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:33:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:33:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 23:33:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:33:36,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875858571] [2022-09-20 23:33:36,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875858571] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:33:36,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221740703] [2022-09-20 23:33:36,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:33:36,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:33:36,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:33:36,648 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 23:33:36,649 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 23:33:36,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 23:33:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:33:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 43 conjunts are in the unsatisfiable core [2022-09-20 23:33:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:33:37,196 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 23:33:37,196 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 48 treesize of output 14 [2022-09-20 23:33:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:33:37,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:33:37,429 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 23:33:37,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 76 [2022-09-20 23:33:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 23:33:37,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221740703] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:33:37,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:33:37,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 23 [2022-09-20 23:33:37,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619809192] [2022-09-20 23:33:37,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:33:37,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-20 23:33:37,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:33:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-20 23:33:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-09-20 23:33:37,787 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 142 [2022-09-20 23:33:37,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 943 transitions, 10723 flow. Second operand has 23 states, 23 states have (on average 89.69565217391305) internal successors, (2063), 23 states have internal predecessors, (2063), 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 23:33:37,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:33:37,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 142 [2022-09-20 23:33:37,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:33:55,086 INFO L130 PetriNetUnfolder]: 21033/45197 cut-off events. [2022-09-20 23:33:55,086 INFO L131 PetriNetUnfolder]: For 2414622/2416712 co-relation queries the response was YES. [2022-09-20 23:33:56,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273800 conditions, 45197 events. 21033/45197 cut-off events. For 2414622/2416712 co-relation queries the response was YES. Maximal size of possible extension queue 1213. Compared 464163 event pairs, 5011 based on Foata normal form. 909/45661 useless extension candidates. Maximal degree in co-relation 273679. Up to 13780 conditions per place. [2022-09-20 23:33:56,721 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 542 selfloop transitions, 596 changer transitions 111/1328 dead transitions. [2022-09-20 23:33:56,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1328 transitions, 17638 flow [2022-09-20 23:33:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-09-20 23:33:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-09-20 23:33:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3862 transitions. [2022-09-20 23:33:56,724 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.647551978537894 [2022-09-20 23:33:56,724 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3862 transitions. [2022-09-20 23:33:56,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3862 transitions. [2022-09-20 23:33:56,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:33:56,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3862 transitions. [2022-09-20 23:33:56,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 91.95238095238095) internal successors, (3862), 42 states have internal predecessors, (3862), 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 23:33:56,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 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 23:33:56,732 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 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 23:33:56,732 INFO L175 Difference]: Start difference. First operand has 506 places, 943 transitions, 10723 flow. Second operand 42 states and 3862 transitions. [2022-09-20 23:33:56,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1328 transitions, 17638 flow [2022-09-20 23:34:11,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1328 transitions, 15112 flow, removed 707 selfloop flow, removed 57 redundant places. [2022-09-20 23:34:11,078 INFO L231 Difference]: Finished difference. Result has 499 places, 994 transitions, 11175 flow [2022-09-20 23:34:11,079 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=8831, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11175, PETRI_PLACES=499, PETRI_TRANSITIONS=994} [2022-09-20 23:34:11,079 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 371 predicate places. [2022-09-20 23:34:11,079 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 994 transitions, 11175 flow [2022-09-20 23:34:11,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.69565217391305) internal successors, (2063), 23 states have internal predecessors, (2063), 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 23:34:11,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:34:11,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:34:11,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-20 23:34:11,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:34:11,296 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 23:34:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:34:11,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1383037227, now seen corresponding path program 4 times [2022-09-20 23:34:11,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:34:11,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122700878] [2022-09-20 23:34:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:34:11,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:34:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:34:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:34:12,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:34:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122700878] [2022-09-20 23:34:12,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122700878] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:34:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727630399] [2022-09-20 23:34:12,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:34:12,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:34:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:34:12,750 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 23:34:12,751 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 23:34:12,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:34:12,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:34:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 66 conjunts are in the unsatisfiable core [2022-09-20 23:34:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:34:12,853 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 23:34:13,082 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-20 23:34:13,082 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 23:34:13,917 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 18 treesize of output 20 [2022-09-20 23:34:14,472 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 23:34:14,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2022-09-20 23:34:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:34:14,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:34:15,110 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (<= c_~back~0 c_~front~0) (and (forall ((v_ArrVal_349 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_349) c_~queue~0.base))) (or (not (= (+ (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1) 0)) (<= (let ((.cse1 (* c_~front~0 4))) (+ c_~sum~0 (select .cse0 (+ c_~queue~0.offset .cse1)) (select .cse0 (+ c_~queue~0.offset .cse1 4)))) 1)))) (forall ((v_ArrVal_349 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_349) c_~queue~0.base))) (or (not (= (+ (select .cse2 (+ c_~queue~0.offset (* c_~back~0 4))) 1) 0)) (<= 0 (let ((.cse3 (* c_~front~0 4))) (+ c_~sum~0 (select .cse2 (+ c_~queue~0.offset .cse3)) (select .cse2 (+ c_~queue~0.offset .cse3 4))))))))) (< c_~front~0 0)) is different from false [2022-09-20 23:34:15,192 INFO L356 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2022-09-20 23:34:15,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 172 [2022-09-20 23:34:15,209 INFO L356 Elim1Store]: treesize reduction 37, result has 27.5 percent of original size [2022-09-20 23:34:15,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-09-20 23:34:15,223 INFO L356 Elim1Store]: treesize reduction 37, result has 27.5 percent of original size [2022-09-20 23:34:15,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 104 [2022-09-20 23:34:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-09-20 23:34:19,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727630399] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:34:19,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:34:19,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28, 28] total 86 [2022-09-20 23:34:19,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148243693] [2022-09-20 23:34:19,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:34:19,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-09-20 23:34:19,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:34:19,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-09-20 23:34:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=6612, Unknown=1, NotChecked=166, Total=7310 [2022-09-20 23:34:19,034 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 142 [2022-09-20 23:34:19,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 994 transitions, 11175 flow. Second operand has 86 states, 86 states have (on average 50.906976744186046) internal successors, (4378), 86 states have internal predecessors, (4378), 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 23:34:19,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:34:19,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 142 [2022-09-20 23:34:19,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:35:01,215 INFO L130 PetriNetUnfolder]: 48571/91514 cut-off events. [2022-09-20 23:35:01,216 INFO L131 PetriNetUnfolder]: For 1942414/1942503 co-relation queries the response was YES. [2022-09-20 23:35:03,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476460 conditions, 91514 events. 48571/91514 cut-off events. For 1942414/1942503 co-relation queries the response was YES. Maximal size of possible extension queue 2151. Compared 922612 event pairs, 8313 based on Foata normal form. 272/91478 useless extension candidates. Maximal degree in co-relation 476355. Up to 33141 conditions per place. [2022-09-20 23:35:04,710 INFO L137 encePairwiseOnDemand]: 93/142 looper letters, 1475 selfloop transitions, 972 changer transitions 0/2488 dead transitions. [2022-09-20 23:35:04,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 2488 transitions, 32944 flow [2022-09-20 23:35:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-09-20 23:35:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-09-20 23:35:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 5793 transitions. [2022-09-20 23:35:04,741 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.38853118712273643 [2022-09-20 23:35:04,741 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 5793 transitions. [2022-09-20 23:35:04,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 5793 transitions. [2022-09-20 23:35:04,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:35:04,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 5793 transitions. [2022-09-20 23:35:04,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 55.17142857142857) internal successors, (5793), 105 states have internal predecessors, (5793), 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 23:35:04,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 142.0) internal successors, (15052), 106 states have internal predecessors, (15052), 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 23:35:04,766 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 142.0) internal successors, (15052), 106 states have internal predecessors, (15052), 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 23:35:04,766 INFO L175 Difference]: Start difference. First operand has 499 places, 994 transitions, 11175 flow. Second operand 105 states and 5793 transitions. [2022-09-20 23:35:04,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 2488 transitions, 32944 flow [2022-09-20 23:35:20,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 2488 transitions, 32144 flow, removed 141 selfloop flow, removed 14 redundant places. [2022-09-20 23:35:20,315 INFO L231 Difference]: Finished difference. Result has 640 places, 1735 transitions, 24590 flow [2022-09-20 23:35:20,316 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=10794, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=24590, PETRI_PLACES=640, PETRI_TRANSITIONS=1735} [2022-09-20 23:35:20,317 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 512 predicate places. [2022-09-20 23:35:20,317 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 1735 transitions, 24590 flow [2022-09-20 23:35:20,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 50.906976744186046) internal successors, (4378), 86 states have internal predecessors, (4378), 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 23:35:20,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:35:20,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:35:20,334 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 23:35:20,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:35:20,524 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 23:35:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:35:20,526 INFO L85 PathProgramCache]: Analyzing trace with hash -224179207, now seen corresponding path program 5 times [2022-09-20 23:35:20,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:35:20,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481641525] [2022-09-20 23:35:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:35:20,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:35:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:35:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 23:35:20,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:35:20,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481641525] [2022-09-20 23:35:20,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481641525] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:35:20,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507526088] [2022-09-20 23:35:20,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:35:20,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:35:20,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:35:20,787 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 23:35:20,788 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 23:35:20,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 23:35:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:35:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 45 conjunts are in the unsatisfiable core [2022-09-20 23:35:20,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:35:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:35:21,348 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 18 treesize of output 20 [2022-09-20 23:35:21,454 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 23:35:21,454 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 48 treesize of output 14 [2022-09-20 23:35:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 23:35:21,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:35:21,634 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_386 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_386) c_~queue~0.base))) (or (not (= (+ (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1) 0)) (<= (let ((.cse1 (* c_~front~0 4))) (+ c_~sum~0 (select .cse0 (+ c_~queue~0.offset .cse1 4)) (select .cse0 (+ c_~queue~0.offset .cse1)))) 1)))) (forall ((v_ArrVal_386 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_386) c_~queue~0.base))) (or (not (= (+ (select .cse2 (+ c_~queue~0.offset (* c_~back~0 4))) 1) 0)) (<= 0 (let ((.cse3 (* c_~front~0 4))) (+ c_~sum~0 (select .cse2 (+ c_~queue~0.offset .cse3 4)) (select .cse2 (+ c_~queue~0.offset .cse3))))))))) is different from false [2022-09-20 23:35:21,748 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 23:35:21,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 186 [2022-09-20 23:35:21,766 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 23:35:21,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 136 [2022-09-20 23:35:21,796 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 23:35:21,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 116 [2022-09-20 23:35:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-09-20 23:35:22,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507526088] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:35:22,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:35:22,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-09-20 23:35:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792390263] [2022-09-20 23:35:22,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:35:22,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-09-20 23:35:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:35:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-09-20 23:35:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1468, Unknown=1, NotChecked=78, Total=1722 [2022-09-20 23:35:22,471 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2022-09-20 23:35:22,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 1735 transitions, 24590 flow. Second operand has 42 states, 42 states have (on average 79.38095238095238) internal successors, (3334), 42 states have internal predecessors, (3334), 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 23:35:22,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:35:22,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2022-09-20 23:35:22,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:36:08,292 INFO L130 PetriNetUnfolder]: 35416/74707 cut-off events. [2022-09-20 23:36:08,292 INFO L131 PetriNetUnfolder]: For 3293037/3299235 co-relation queries the response was YES. [2022-09-20 23:36:12,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613828 conditions, 74707 events. 35416/74707 cut-off events. For 3293037/3299235 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 815133 event pairs, 6956 based on Foata normal form. 1910/74210 useless extension candidates. Maximal degree in co-relation 613674. Up to 20610 conditions per place. [2022-09-20 23:36:13,304 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 925 selfloop transitions, 992 changer transitions 123/2173 dead transitions. [2022-09-20 23:36:13,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 2173 transitions, 35836 flow [2022-09-20 23:36:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-09-20 23:36:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-09-20 23:36:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3325 transitions. [2022-09-20 23:36:13,307 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.585387323943662 [2022-09-20 23:36:13,307 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3325 transitions. [2022-09-20 23:36:13,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3325 transitions. [2022-09-20 23:36:13,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:36:13,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3325 transitions. [2022-09-20 23:36:13,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 83.125) internal successors, (3325), 40 states have internal predecessors, (3325), 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 23:36:13,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 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 23:36:13,313 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 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 23:36:13,313 INFO L175 Difference]: Start difference. First operand has 640 places, 1735 transitions, 24590 flow. Second operand 40 states and 3325 transitions. [2022-09-20 23:36:13,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 2173 transitions, 35836 flow [2022-09-20 23:36:54,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 2173 transitions, 34487 flow, removed 640 selfloop flow, removed 32 redundant places. [2022-09-20 23:36:54,678 INFO L231 Difference]: Finished difference. Result has 659 places, 1821 transitions, 28172 flow [2022-09-20 23:36:54,679 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=23493, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=914, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=28172, PETRI_PLACES=659, PETRI_TRANSITIONS=1821} [2022-09-20 23:36:54,680 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 531 predicate places. [2022-09-20 23:36:54,680 INFO L495 AbstractCegarLoop]: Abstraction has has 659 places, 1821 transitions, 28172 flow [2022-09-20 23:36:54,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 79.38095238095238) internal successors, (3334), 42 states have internal predecessors, (3334), 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 23:36:54,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:36:54,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:54,698 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 23:36:54,885 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,SelfDestructingSolverStorable14 [2022-09-20 23:36:54,885 INFO L420 AbstractCegarLoop]: === Iteration 16 === 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 23:36:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:36:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1420563541, now seen corresponding path program 6 times [2022-09-20 23:36:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:36:54,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655171095] [2022-09-20 23:36:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:36:54,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:36:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:36:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 23:36:55,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:36:55,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655171095] [2022-09-20 23:36:55,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655171095] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:36:55,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930557563] [2022-09-20 23:36:55,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 23:36:55,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:36:55,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:36:55,160 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 23:36:55,161 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 23:36:55,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-09-20 23:36:55,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:36:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 75 conjunts are in the unsatisfiable core [2022-09-20 23:36:55,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:36:55,778 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 15 treesize of output 11 [2022-09-20 23:36:55,979 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 23:36:56,078 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 23:36:56,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:36:56,275 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 18 treesize of output 20 [2022-09-20 23:36:56,600 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 23:36:56,600 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 50 treesize of output 16 [2022-09-20 23:36:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:36:56,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:36:57,037 WARN L833 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_427 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427) c_~queue~0.base))) (or (not (= (+ (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1) 0)) (<= 0 (let ((.cse1 (* c_~front~0 4))) (+ c_~sum~0 (select .cse0 (+ c_~queue~0.offset .cse1)) (select .cse0 (+ c_~queue~0.offset .cse1 4)))))))) (forall ((v_ArrVal_427 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427) c_~queue~0.base))) (or (not (= (+ (select .cse2 (+ c_~queue~0.offset (* c_~back~0 4))) 1) 0)) (<= (let ((.cse3 (* c_~front~0 4))) (+ c_~sum~0 (select .cse2 (+ c_~queue~0.offset .cse3)) (select .cse2 (+ c_~queue~0.offset .cse3 4)))) 1))))) (<= c_~n~0 c_~back~0) (<= c_~back~0 c_~front~0) (< c_~front~0 0)) is different from false [2022-09-20 23:36:57,206 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~back~0 1))) (or (and (forall ((v_ArrVal_427 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427) c_~queue~0.base))) (or (<= (let ((.cse1 (* c_~front~0 4))) (+ c_~sum~0 (select .cse0 (+ c_~queue~0.offset .cse1)) (select .cse0 (+ c_~queue~0.offset .cse1 4)))) 1) (not (= (+ (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4) 4)) 1) 0))))) (forall ((v_ArrVal_427 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427) c_~queue~0.base))) (or (<= 0 (let ((.cse3 (* c_~front~0 4))) (+ c_~sum~0 (select .cse2 (+ c_~queue~0.offset .cse3)) (select .cse2 (+ c_~queue~0.offset .cse3 4))))) (not (= (+ (select .cse2 (+ c_~queue~0.offset (* c_~back~0 4) 4)) 1) 0)))))) (<= .cse4 c_~front~0) (<= c_~n~0 .cse4) (= (mod |c_thread2Thread1of1ForFork2_~b~0#1| 256) 0) (< c_~front~0 0) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)))) is different from false [2022-09-20 23:36:58,558 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:36:58,558 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 132 treesize of output 96 [2022-09-20 23:36:58,585 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-09-20 23:36:58,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 978 treesize of output 948 [2022-09-20 23:36:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:58,604 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:36:58,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 772 treesize of output 630 [2022-09-20 23:36:58,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:58,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:58,629 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:36:58,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 589 treesize of output 588 [2022-09-20 23:36:58,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:58,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:58,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:58,652 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:36:58,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 698 treesize of output 645 [2022-09-20 23:36:59,846 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:36:59,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 96 [2022-09-20 23:36:59,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:59,867 INFO L356 Elim1Store]: treesize reduction 94, result has 8.7 percent of original size [2022-09-20 23:36:59,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 562 treesize of output 502 [2022-09-20 23:36:59,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:36:59,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:59,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:36:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:36:59,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 345 [2022-09-20 23:36:59,894 INFO L356 Elim1Store]: treesize reduction 94, result has 8.7 percent of original size [2022-09-20 23:36:59,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 442 treesize of output 346 [2022-09-20 23:37:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-09-20 23:37:00,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930557563] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:37:00,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:37:00,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32, 31] total 73 [2022-09-20 23:37:00,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371155670] [2022-09-20 23:37:00,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:37:00,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-09-20 23:37:00,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:37:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-09-20 23:37:00,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=4435, Unknown=19, NotChecked=278, Total=5256 [2022-09-20 23:37:00,800 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2022-09-20 23:37:00,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1821 transitions, 28172 flow. Second operand has 73 states, 73 states have (on average 59.12328767123287) internal successors, (4316), 73 states have internal predecessors, (4316), 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 23:37:00,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:37:00,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2022-09-20 23:37:00,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand