/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 02:35:36,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 02:35:36,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 02:35:36,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 02:35:36,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 02:35:36,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 02:35:36,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 02:35:36,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 02:35:36,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 02:35:36,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 02:35:36,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 02:35:36,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 02:35:36,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 02:35:36,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 02:35:36,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 02:35:36,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 02:35:36,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 02:35:36,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 02:35:36,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 02:35:36,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 02:35:36,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 02:35:36,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 02:35:36,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 02:35:36,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 02:35:36,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 02:35:36,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 02:35:36,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 02:35:36,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 02:35:36,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 02:35:36,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 02:35:36,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 02:35:36,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 02:35:36,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 02:35:36,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 02:35:36,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 02:35:36,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 02:35:36,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 02:35:36,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 02:35:36,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 02:35:36,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 02:35:36,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 02:35:36,590 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 [2022-01-19 02:35:36,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 02:35:36,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 02:35:36,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 02:35:36,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 02:35:36,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 02:35:36,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 02:35:36,616 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 02:35:36,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 02:35:36,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 02:35:36,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 02:35:36,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 02:35:36,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 02:35:36,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 02:35:36,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 02:35:36,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:35:36,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 02:35:36,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 02:35:36,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 02:35:36,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 02:35:36,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 02:35:36,619 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 02:35:36,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 02:35:36,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 02:35:36,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 02:35:36,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 02:35:36,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 02:35:36,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 02:35:36,814 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 02:35:36,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2022-01-19 02:35:36,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e450ff582/b4a2addab60f47a38df70e62e4940c37/FLAG779c90fcf [2022-01-19 02:35:37,151 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 02:35:37,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2022-01-19 02:35:37,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e450ff582/b4a2addab60f47a38df70e62e4940c37/FLAG779c90fcf [2022-01-19 02:35:37,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e450ff582/b4a2addab60f47a38df70e62e4940c37 [2022-01-19 02:35:37,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 02:35:37,582 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 02:35:37,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 02:35:37,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 02:35:37,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 02:35:37,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379b87ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37, skipping insertion in model container [2022-01-19 02:35:37,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 02:35:37,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 02:35:37,793 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-queue-add-2.wvr.c[2696,2709] [2022-01-19 02:35:37,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:35:37,810 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 02:35:37,837 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-queue-add-2.wvr.c[2696,2709] [2022-01-19 02:35:37,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:35:37,854 INFO L208 MainTranslator]: Completed translation [2022-01-19 02:35:37,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37 WrapperNode [2022-01-19 02:35:37,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 02:35:37,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 02:35:37,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 02:35:37,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 02:35:37,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,895 INFO L137 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-01-19 02:35:37,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 02:35:37,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 02:35:37,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 02:35:37,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 02:35:37,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 02:35:37,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 02:35:37,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 02:35:37,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 02:35:37,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (1/1) ... [2022-01-19 02:35:37,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:35:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:35:37,956 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) [2022-01-19 02:35:37,980 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 [2022-01-19 02:35:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 02:35:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 02:35:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 02:35:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 02:35:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 02:35:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 02:35:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 02:35:37,989 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 02:35:38,053 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 02:35:38,054 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 02:35:38,264 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 02:35:38,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 02:35:38,344 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 02:35:38,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:35:38 BoogieIcfgContainer [2022-01-19 02:35:38,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 02:35:38,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 02:35:38,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 02:35:38,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 02:35:38,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:35:37" (1/3) ... [2022-01-19 02:35:38,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372c5d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:35:38, skipping insertion in model container [2022-01-19 02:35:38,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:35:37" (2/3) ... [2022-01-19 02:35:38,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372c5d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:35:38, skipping insertion in model container [2022-01-19 02:35:38,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:35:38" (3/3) ... [2022-01-19 02:35:38,355 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-01-19 02:35:38,359 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 02:35:38,360 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 02:35:38,360 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 02:35:38,402 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,403 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,403 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,404 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,404 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,411 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,415 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,415 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,415 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,415 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,416 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,416 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,416 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:35:38,425 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 02:35:38,465 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 02:35:38,470 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 02:35:38,470 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 02:35:38,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2022-01-19 02:35:38,535 INFO L129 PetriNetUnfolder]: 11/134 cut-off events. [2022-01-19 02:35:38,536 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:35:38,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-01-19 02:35:38,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2022-01-19 02:35:38,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2022-01-19 02:35:38,580 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2022-01-19 02:35:38,580 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:35:38,581 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:38,581 INFO L254 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] [2022-01-19 02:35:38,582 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash 321786498, now seen corresponding path program 1 times [2022-01-19 02:35:38,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:38,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973905690] [2022-01-19 02:35:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:38,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:38,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:38,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973905690] [2022-01-19 02:35:38,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973905690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:35:38,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:35:38,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 02:35:38,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104276319] [2022-01-19 02:35:38,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:35:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 02:35:38,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:38,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 02:35:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 02:35:38,821 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 136 [2022-01-19 02:35:38,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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) [2022-01-19 02:35:38,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:38,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 136 [2022-01-19 02:35:38,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:35:38,878 INFO L129 PetriNetUnfolder]: 12/147 cut-off events. [2022-01-19 02:35:38,879 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-01-19 02:35:38,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 147 events. 12/147 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 5 based on Foata normal form. 14/150 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2022-01-19 02:35:38,881 INFO L132 encePairwiseOnDemand]: 128/136 looper letters, 7 selfloop transitions, 0 changer transitions 4/117 dead transitions. [2022-01-19 02:35:38,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 260 flow [2022-01-19 02:35:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 02:35:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 02:35:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2022-01-19 02:35:38,893 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9375 [2022-01-19 02:35:38,893 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2022-01-19 02:35:38,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2022-01-19 02:35:38,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:35:38,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2022-01-19 02:35:38,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 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) [2022-01-19 02:35:38,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2022-01-19 02:35:38,906 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2022-01-19 02:35:38,908 INFO L186 Difference]: Start difference. First operand has 121 places, 125 transitions, 262 flow. Second operand 2 states and 255 transitions. [2022-01-19 02:35:38,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 260 flow [2022-01-19 02:35:38,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 02:35:38,912 INFO L242 Difference]: Finished difference. Result has 118 places, 113 transitions, 230 flow [2022-01-19 02:35:38,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2022-01-19 02:35:38,918 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2022-01-19 02:35:38,918 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 230 flow [2022-01-19 02:35:38,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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) [2022-01-19 02:35:38,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:38,919 INFO L254 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] [2022-01-19 02:35:38,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 02:35:38,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash -632914253, now seen corresponding path program 1 times [2022-01-19 02:35:38,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53469938] [2022-01-19 02:35:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:38,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:39,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:39,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53469938] [2022-01-19 02:35:39,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53469938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:35:39,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:35:39,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:35:39,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449996193] [2022-01-19 02:35:39,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:35:39,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:35:39,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:35:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:35:39,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 136 [2022-01-19 02:35:39,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 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) [2022-01-19 02:35:39,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:39,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 136 [2022-01-19 02:35:39,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:35:39,138 INFO L129 PetriNetUnfolder]: 12/179 cut-off events. [2022-01-19 02:35:39,138 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 02:35:39,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 250 event pairs, 5 based on Foata normal form. 5/175 useless extension candidates. Maximal degree in co-relation 227. Up to 31 conditions per place. [2022-01-19 02:35:39,139 INFO L132 encePairwiseOnDemand]: 126/136 looper letters, 19 selfloop transitions, 6 changer transitions 3/120 dead transitions. [2022-01-19 02:35:39,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 302 flow [2022-01-19 02:35:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 02:35:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 02:35:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-01-19 02:35:39,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8119747899159664 [2022-01-19 02:35:39,146 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-01-19 02:35:39,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-01-19 02:35:39,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:35:39,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-01-19 02:35:39,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 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) [2022-01-19 02:35:39,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 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) [2022-01-19 02:35:39,151 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 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) [2022-01-19 02:35:39,151 INFO L186 Difference]: Start difference. First operand has 118 places, 113 transitions, 230 flow. Second operand 7 states and 773 transitions. [2022-01-19 02:35:39,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 302 flow [2022-01-19 02:35:39,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 02:35:39,154 INFO L242 Difference]: Finished difference. Result has 122 places, 114 transitions, 256 flow [2022-01-19 02:35:39,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2022-01-19 02:35:39,154 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2022-01-19 02:35:39,154 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 256 flow [2022-01-19 02:35:39,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 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) [2022-01-19 02:35:39,155 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:39,155 INFO L254 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] [2022-01-19 02:35:39,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 02:35:39,156 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash 853527032, now seen corresponding path program 1 times [2022-01-19 02:35:39,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:39,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050672104] [2022-01-19 02:35:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:39,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:35:39,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:39,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050672104] [2022-01-19 02:35:39,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050672104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:35:39,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:35:39,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 02:35:39,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359862385] [2022-01-19 02:35:39,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:35:39,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 02:35:39,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:39,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 02:35:39,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 02:35:39,243 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-01-19 02:35:39,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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) [2022-01-19 02:35:39,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:39,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-01-19 02:35:39,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:35:39,270 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-01-19 02:35:39,270 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-01-19 02:35:39,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 156 events. 13/156 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 1 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 208. Up to 23 conditions per place. [2022-01-19 02:35:39,271 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 11 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2022-01-19 02:35:39,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 117 transitions, 295 flow [2022-01-19 02:35:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 02:35:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 02:35:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-01-19 02:35:39,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8897058823529411 [2022-01-19 02:35:39,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-01-19 02:35:39,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-01-19 02:35:39,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:35:39,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-01-19 02:35:39,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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) [2022-01-19 02:35:39,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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) [2022-01-19 02:35:39,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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) [2022-01-19 02:35:39,275 INFO L186 Difference]: Start difference. First operand has 122 places, 114 transitions, 256 flow. Second operand 3 states and 363 transitions. [2022-01-19 02:35:39,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 117 transitions, 295 flow [2022-01-19 02:35:39,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 02:35:39,278 INFO L242 Difference]: Finished difference. Result has 120 places, 116 transitions, 269 flow [2022-01-19 02:35:39,278 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2022-01-19 02:35:39,279 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2022-01-19 02:35:39,279 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 269 flow [2022-01-19 02:35:39,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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) [2022-01-19 02:35:39,279 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:39,279 INFO L254 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] [2022-01-19 02:35:39,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 02:35:39,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1991812262, now seen corresponding path program 2 times [2022-01-19 02:35:39,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817328077] [2022-01-19 02:35:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:39,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:35:39,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:39,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817328077] [2022-01-19 02:35:39,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817328077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:35:39,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:35:39,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-19 02:35:39,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418961820] [2022-01-19 02:35:39,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:35:39,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 02:35:39,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 02:35:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-19 02:35:39,540 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2022-01-19 02:35:39,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 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) [2022-01-19 02:35:39,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:39,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2022-01-19 02:35:39,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:35:39,724 INFO L129 PetriNetUnfolder]: 82/335 cut-off events. [2022-01-19 02:35:39,725 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2022-01-19 02:35:39,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 335 events. 82/335 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1209 event pairs, 20 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 637. Up to 73 conditions per place. [2022-01-19 02:35:39,728 INFO L132 encePairwiseOnDemand]: 121/136 looper letters, 49 selfloop transitions, 13 changer transitions 6/147 dead transitions. [2022-01-19 02:35:39,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 498 flow [2022-01-19 02:35:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-19 02:35:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-01-19 02:35:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1213 transitions. [2022-01-19 02:35:39,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6860859728506787 [2022-01-19 02:35:39,731 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1213 transitions. [2022-01-19 02:35:39,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1213 transitions. [2022-01-19 02:35:39,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:35:39,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1213 transitions. [2022-01-19 02:35:39,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 93.3076923076923) internal successors, (1213), 13 states have internal predecessors, (1213), 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) [2022-01-19 02:35:39,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 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) [2022-01-19 02:35:39,737 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 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) [2022-01-19 02:35:39,738 INFO L186 Difference]: Start difference. First operand has 120 places, 116 transitions, 269 flow. Second operand 13 states and 1213 transitions. [2022-01-19 02:35:39,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 498 flow [2022-01-19 02:35:39,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 147 transitions, 473 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-01-19 02:35:39,743 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 318 flow [2022-01-19 02:35:39,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2022-01-19 02:35:39,744 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 14 predicate places. [2022-01-19 02:35:39,744 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 318 flow [2022-01-19 02:35:39,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 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) [2022-01-19 02:35:39,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:39,745 INFO L254 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] [2022-01-19 02:35:39,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 02:35:39,745 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash -199541928, now seen corresponding path program 1 times [2022-01-19 02:35:39,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:39,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942310850] [2022-01-19 02:35:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:39,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:39,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:39,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942310850] [2022-01-19 02:35:39,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942310850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:35:39,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603738794] [2022-01-19 02:35:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:39,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:39,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:35:39,888 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) [2022-01-19 02:35:39,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 02:35:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 02:35:39,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:35:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:35:40,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 02:35:40,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603738794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:35:40,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 02:35:40,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 12 [2022-01-19 02:35:40,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670932320] [2022-01-19 02:35:40,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:35:40,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 02:35:40,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 02:35:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-19 02:35:40,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-01-19 02:35:40,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 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) [2022-01-19 02:35:40,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:40,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-01-19 02:35:40,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:35:40,260 INFO L129 PetriNetUnfolder]: 26/275 cut-off events. [2022-01-19 02:35:40,260 INFO L130 PetriNetUnfolder]: For 82/93 co-relation queries the response was YES. [2022-01-19 02:35:40,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 275 events. 26/275 cut-off events. For 82/93 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 828 event pairs, 2 based on Foata normal form. 6/277 useless extension candidates. Maximal degree in co-relation 442. Up to 37 conditions per place. [2022-01-19 02:35:40,261 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 16 selfloop transitions, 7 changer transitions 3/132 dead transitions. [2022-01-19 02:35:40,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 399 flow [2022-01-19 02:35:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 02:35:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 02:35:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2022-01-19 02:35:40,263 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8952205882352942 [2022-01-19 02:35:40,263 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2022-01-19 02:35:40,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2022-01-19 02:35:40,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:35:40,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2022-01-19 02:35:40,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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) [2022-01-19 02:35:40,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 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) [2022-01-19 02:35:40,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 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) [2022-01-19 02:35:40,266 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 318 flow. Second operand 4 states and 487 transitions. [2022-01-19 02:35:40,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 399 flow [2022-01-19 02:35:40,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 383 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-01-19 02:35:40,269 INFO L242 Difference]: Finished difference. Result has 130 places, 123 transitions, 336 flow [2022-01-19 02:35:40,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=130, PETRI_TRANSITIONS=123} [2022-01-19 02:35:40,270 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 9 predicate places. [2022-01-19 02:35:40,270 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 123 transitions, 336 flow [2022-01-19 02:35:40,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 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) [2022-01-19 02:35:40,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:40,270 INFO L254 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] [2022-01-19 02:35:40,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 02:35:40,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:40,484 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1155105201, now seen corresponding path program 1 times [2022-01-19 02:35:40,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:40,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089492268] [2022-01-19 02:35:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:40,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:40,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:40,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089492268] [2022-01-19 02:35:40,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089492268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:35:40,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184221565] [2022-01-19 02:35:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:40,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:40,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:35:40,580 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) [2022-01-19 02:35:40,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 02:35:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:35:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:35:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:40,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:35:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:41,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184221565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:35:41,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:35:41,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 02:35:41,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679893206] [2022-01-19 02:35:41,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:35:41,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:35:41,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:35:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:35:41,145 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-01-19 02:35:41,146 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 123 transitions, 336 flow. Second operand has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 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) [2022-01-19 02:35:41,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:41,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-01-19 02:35:41,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:35:41,357 INFO L129 PetriNetUnfolder]: 26/315 cut-off events. [2022-01-19 02:35:41,357 INFO L130 PetriNetUnfolder]: For 212/255 co-relation queries the response was YES. [2022-01-19 02:35:41,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 315 events. 26/315 cut-off events. For 212/255 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 926 event pairs, 6 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 568. Up to 54 conditions per place. [2022-01-19 02:35:41,359 INFO L132 encePairwiseOnDemand]: 124/136 looper letters, 28 selfloop transitions, 11 changer transitions 6/137 dead transitions. [2022-01-19 02:35:41,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 475 flow [2022-01-19 02:35:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 02:35:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 02:35:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2022-01-19 02:35:41,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7824754901960784 [2022-01-19 02:35:41,362 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2022-01-19 02:35:41,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2022-01-19 02:35:41,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:35:41,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2022-01-19 02:35:41,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 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) [2022-01-19 02:35:41,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 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) [2022-01-19 02:35:41,366 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 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) [2022-01-19 02:35:41,366 INFO L186 Difference]: Start difference. First operand has 130 places, 123 transitions, 336 flow. Second operand 12 states and 1277 transitions. [2022-01-19 02:35:41,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 475 flow [2022-01-19 02:35:41,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 459 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-01-19 02:35:41,369 INFO L242 Difference]: Finished difference. Result has 144 places, 127 transitions, 385 flow [2022-01-19 02:35:41,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=385, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-01-19 02:35:41,370 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 23 predicate places. [2022-01-19 02:35:41,370 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 385 flow [2022-01-19 02:35:41,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 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) [2022-01-19 02:35:41,371 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:41,371 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:35:41,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 02:35:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-19 02:35:41,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash -477337818, now seen corresponding path program 2 times [2022-01-19 02:35:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038791871] [2022-01-19 02:35:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:41,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:42,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:42,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038791871] [2022-01-19 02:35:42,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038791871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:35:42,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110929048] [2022-01-19 02:35:42,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:35:42,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:35:42,311 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) [2022-01-19 02:35:42,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 02:35:42,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:35:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:35:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-19 02:35:42,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:35:43,076 INFO L387 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 [2022-01-19 02:35:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:43,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:35:43,295 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 02:35:43,295 INFO L387 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 25 treesize of output 16 [2022-01-19 02:35:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:44,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110929048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:35:44,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:35:44,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 45 [2022-01-19 02:35:44,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943263120] [2022-01-19 02:35:44,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:35:44,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-19 02:35:44,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-19 02:35:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2022-01-19 02:35:44,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 136 [2022-01-19 02:35:44,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 385 flow. Second operand has 45 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 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) [2022-01-19 02:35:44,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:44,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 136 [2022-01-19 02:35:44,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:35:46,914 INFO L129 PetriNetUnfolder]: 750/2362 cut-off events. [2022-01-19 02:35:46,915 INFO L130 PetriNetUnfolder]: For 2354/2454 co-relation queries the response was YES. [2022-01-19 02:35:46,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5643 conditions, 2362 events. 750/2362 cut-off events. For 2354/2454 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18401 event pairs, 112 based on Foata normal form. 36/2308 useless extension candidates. Maximal degree in co-relation 5626. Up to 401 conditions per place. [2022-01-19 02:35:46,930 INFO L132 encePairwiseOnDemand]: 108/136 looper letters, 198 selfloop transitions, 76 changer transitions 0/329 dead transitions. [2022-01-19 02:35:46,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 329 transitions, 1794 flow [2022-01-19 02:35:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-19 02:35:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-01-19 02:35:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2928 transitions. [2022-01-19 02:35:46,936 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2022-01-19 02:35:46,936 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2928 transitions. [2022-01-19 02:35:46,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2928 transitions. [2022-01-19 02:35:46,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:35:46,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2928 transitions. [2022-01-19 02:35:46,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 69.71428571428571) internal successors, (2928), 42 states have internal predecessors, (2928), 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) [2022-01-19 02:35:46,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 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) [2022-01-19 02:35:46,949 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 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) [2022-01-19 02:35:46,949 INFO L186 Difference]: Start difference. First operand has 144 places, 127 transitions, 385 flow. Second operand 42 states and 2928 transitions. [2022-01-19 02:35:46,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 329 transitions, 1794 flow [2022-01-19 02:35:46,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 329 transitions, 1723 flow, removed 31 selfloop flow, removed 6 redundant places. [2022-01-19 02:35:46,958 INFO L242 Difference]: Finished difference. Result has 200 places, 191 transitions, 1073 flow [2022-01-19 02:35:46,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1073, PETRI_PLACES=200, PETRI_TRANSITIONS=191} [2022-01-19 02:35:46,959 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 79 predicate places. [2022-01-19 02:35:46,959 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 191 transitions, 1073 flow [2022-01-19 02:35:46,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 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) [2022-01-19 02:35:46,960 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:46,960 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:35:46,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 02:35:47,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:47,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:47,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:47,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2090966660, now seen corresponding path program 3 times [2022-01-19 02:35:47,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:47,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377251827] [2022-01-19 02:35:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:47,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:48,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:48,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377251827] [2022-01-19 02:35:48,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377251827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:35:48,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707008977] [2022-01-19 02:35:48,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:35:48,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:48,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:35:48,117 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) [2022-01-19 02:35:48,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 02:35:48,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 02:35:48,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:35:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 02:35:48,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:35:48,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:35:48,626 INFO L387 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 [2022-01-19 02:35:48,676 INFO L387 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 [2022-01-19 02:35:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:35:48,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:35:48,779 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_149 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_149) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2022-01-19 02:35:48,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:35:48,816 INFO L387 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 45 treesize of output 45 [2022-01-19 02:35:48,819 INFO L387 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 24 treesize of output 18 [2022-01-19 02:35:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:35:49,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707008977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:35:49,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:35:49,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 45 [2022-01-19 02:35:49,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831938735] [2022-01-19 02:35:49,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:35:49,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-19 02:35:49,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-19 02:35:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1774, Unknown=1, NotChecked=84, Total=1980 [2022-01-19 02:35:49,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-01-19 02:35:49,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 191 transitions, 1073 flow. Second operand has 45 states, 45 states have (on average 58.48888888888889) internal successors, (2632), 45 states have internal predecessors, (2632), 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) [2022-01-19 02:35:49,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:49,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-01-19 02:35:49,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:35:53,509 INFO L129 PetriNetUnfolder]: 957/2920 cut-off events. [2022-01-19 02:35:53,510 INFO L130 PetriNetUnfolder]: For 15494/15830 co-relation queries the response was YES. [2022-01-19 02:35:53,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9788 conditions, 2920 events. 957/2920 cut-off events. For 15494/15830 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23632 event pairs, 76 based on Foata normal form. 182/3042 useless extension candidates. Maximal degree in co-relation 9750. Up to 541 conditions per place. [2022-01-19 02:35:53,534 INFO L132 encePairwiseOnDemand]: 110/136 looper letters, 186 selfloop transitions, 117 changer transitions 0/352 dead transitions. [2022-01-19 02:35:53,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 352 transitions, 2854 flow [2022-01-19 02:35:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 02:35:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 02:35:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2635 transitions. [2022-01-19 02:35:53,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2022-01-19 02:35:53,541 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2635 transitions. [2022-01-19 02:35:53,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2635 transitions. [2022-01-19 02:35:53,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:35:53,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2635 transitions. [2022-01-19 02:35:53,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 59.88636363636363) internal successors, (2635), 44 states have internal predecessors, (2635), 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) [2022-01-19 02:35:53,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 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) [2022-01-19 02:35:53,554 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 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) [2022-01-19 02:35:53,554 INFO L186 Difference]: Start difference. First operand has 200 places, 191 transitions, 1073 flow. Second operand 44 states and 2635 transitions. [2022-01-19 02:35:53,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 352 transitions, 2854 flow [2022-01-19 02:35:53,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 352 transitions, 2700 flow, removed 60 selfloop flow, removed 15 redundant places. [2022-01-19 02:35:53,574 INFO L242 Difference]: Finished difference. Result has 237 places, 236 transitions, 1751 flow [2022-01-19 02:35:53,575 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1751, PETRI_PLACES=237, PETRI_TRANSITIONS=236} [2022-01-19 02:35:53,577 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 116 predicate places. [2022-01-19 02:35:53,577 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 236 transitions, 1751 flow [2022-01-19 02:35:53,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 58.48888888888889) internal successors, (2632), 45 states have internal predecessors, (2632), 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) [2022-01-19 02:35:53,578 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:53,578 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:35:53,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 02:35:53,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:53,787 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash 176551504, now seen corresponding path program 1 times [2022-01-19 02:35:53,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:53,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838140698] [2022-01-19 02:35:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:53,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:54,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838140698] [2022-01-19 02:35:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838140698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:35:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558908653] [2022-01-19 02:35:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:54,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:54,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:35:54,904 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) [2022-01-19 02:35:54,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 02:35:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-19 02:35:54,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:35:55,000 INFO L387 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 [2022-01-19 02:35:55,246 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:35:55,247 INFO L387 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 [2022-01-19 02:35:56,052 INFO L387 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 [2022-01-19 02:35:56,486 INFO L387 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 [2022-01-19 02:35:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:56,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:35:57,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:35:57,280 INFO L387 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 111 treesize of output 95 [2022-01-19 02:35:57,284 INFO L387 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 67 treesize of output 49 [2022-01-19 02:35:59,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 02:35:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:59,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558908653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:35:59,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:35:59,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 85 [2022-01-19 02:35:59,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584849748] [2022-01-19 02:35:59,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:35:59,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-19 02:35:59,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-19 02:35:59,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=6623, Unknown=2, NotChecked=0, Total=7140 [2022-01-19 02:35:59,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 02:35:59,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 236 transitions, 1751 flow. Second operand has 85 states, 85 states have (on average 49.37647058823529) internal successors, (4197), 85 states have internal predecessors, (4197), 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) [2022-01-19 02:35:59,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:59,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 02:35:59,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:36:13,765 INFO L129 PetriNetUnfolder]: 5750/11340 cut-off events. [2022-01-19 02:36:13,765 INFO L130 PetriNetUnfolder]: For 68850/68859 co-relation queries the response was YES. [2022-01-19 02:36:13,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43797 conditions, 11340 events. 5750/11340 cut-off events. For 68850/68859 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 96386 event pairs, 367 based on Foata normal form. 13/11322 useless extension candidates. Maximal degree in co-relation 43750. Up to 2470 conditions per place. [2022-01-19 02:36:13,861 INFO L132 encePairwiseOnDemand]: 99/136 looper letters, 618 selfloop transitions, 351 changer transitions 46/1055 dead transitions. [2022-01-19 02:36:13,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1055 transitions, 9624 flow [2022-01-19 02:36:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-19 02:36:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-01-19 02:36:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 6341 transitions. [2022-01-19 02:36:13,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3853305785123967 [2022-01-19 02:36:13,869 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 6341 transitions. [2022-01-19 02:36:13,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 6341 transitions. [2022-01-19 02:36:13,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:36:13,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 6341 transitions. [2022-01-19 02:36:13,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 52.40495867768595) internal successors, (6341), 121 states have internal predecessors, (6341), 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) [2022-01-19 02:36:13,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 136.0) internal successors, (16592), 122 states have internal predecessors, (16592), 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) [2022-01-19 02:36:13,893 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 136.0) internal successors, (16592), 122 states have internal predecessors, (16592), 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) [2022-01-19 02:36:13,893 INFO L186 Difference]: Start difference. First operand has 237 places, 236 transitions, 1751 flow. Second operand 121 states and 6341 transitions. [2022-01-19 02:36:13,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1055 transitions, 9624 flow [2022-01-19 02:36:14,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1055 transitions, 9436 flow, removed 62 selfloop flow, removed 29 redundant places. [2022-01-19 02:36:14,064 INFO L242 Difference]: Finished difference. Result has 370 places, 535 transitions, 5321 flow [2022-01-19 02:36:14,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=5321, PETRI_PLACES=370, PETRI_TRANSITIONS=535} [2022-01-19 02:36:14,066 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 249 predicate places. [2022-01-19 02:36:14,066 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 535 transitions, 5321 flow [2022-01-19 02:36:14,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 49.37647058823529) internal successors, (4197), 85 states have internal predecessors, (4197), 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) [2022-01-19 02:36:14,067 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:36:14,067 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:36:14,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 02:36:14,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:36:14,286 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:36:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:36:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1651370038, now seen corresponding path program 2 times [2022-01-19 02:36:14,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:36:14,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913721182] [2022-01-19 02:36:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:36:14,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:36:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:36:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:36:15,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:36:15,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913721182] [2022-01-19 02:36:15,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913721182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:36:15,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917161417] [2022-01-19 02:36:15,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:36:15,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:36:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:36:15,216 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) [2022-01-19 02:36:15,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 02:36:15,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:36:15,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:36:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-19 02:36:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:36:16,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:36:16,466 INFO L387 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 [2022-01-19 02:36:16,755 INFO L387 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 [2022-01-19 02:36:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:36:17,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:36:17,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:36:17,854 INFO L387 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 111 treesize of output 95 [2022-01-19 02:36:17,858 INFO L387 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 67 treesize of output 49 [2022-01-19 02:36:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:36:19,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917161417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:36:19,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:36:19,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 87 [2022-01-19 02:36:19,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698898407] [2022-01-19 02:36:19,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:36:19,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-19 02:36:19,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:36:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-19 02:36:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=6886, Unknown=5, NotChecked=0, Total=7482 [2022-01-19 02:36:19,484 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 02:36:19,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 535 transitions, 5321 flow. Second operand has 87 states, 87 states have (on average 48.37931034482759) internal successors, (4209), 87 states have internal predecessors, (4209), 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) [2022-01-19 02:36:19,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:36:19,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 02:36:19,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:36:41,375 INFO L129 PetriNetUnfolder]: 8600/18069 cut-off events. [2022-01-19 02:36:41,376 INFO L130 PetriNetUnfolder]: For 219267/219293 co-relation queries the response was YES. [2022-01-19 02:36:41,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96583 conditions, 18069 events. 8600/18069 cut-off events. For 219267/219293 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 177779 event pairs, 198 based on Foata normal form. 359/18394 useless extension candidates. Maximal degree in co-relation 96499. Up to 2824 conditions per place. [2022-01-19 02:36:41,595 INFO L132 encePairwiseOnDemand]: 97/136 looper letters, 699 selfloop transitions, 817 changer transitions 374/1929 dead transitions. [2022-01-19 02:36:41,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1929 transitions, 23309 flow [2022-01-19 02:36:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-01-19 02:36:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2022-01-19 02:36:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 9729 transitions. [2022-01-19 02:36:41,612 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3805147058823529 [2022-01-19 02:36:41,613 INFO L72 ComplementDD]: Start complementDD. Operand 188 states and 9729 transitions. [2022-01-19 02:36:41,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 188 states and 9729 transitions. [2022-01-19 02:36:41,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:36:41,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 188 states and 9729 transitions. [2022-01-19 02:36:41,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 189 states, 188 states have (on average 51.75) internal successors, (9729), 188 states have internal predecessors, (9729), 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) [2022-01-19 02:36:41,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 189 states, 189 states have (on average 136.0) internal successors, (25704), 189 states have internal predecessors, (25704), 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) [2022-01-19 02:36:41,658 INFO L81 ComplementDD]: Finished complementDD. Result has 189 states, 189 states have (on average 136.0) internal successors, (25704), 189 states have internal predecessors, (25704), 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) [2022-01-19 02:36:41,658 INFO L186 Difference]: Start difference. First operand has 370 places, 535 transitions, 5321 flow. Second operand 188 states and 9729 transitions. [2022-01-19 02:36:41,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1929 transitions, 23309 flow [2022-01-19 02:36:42,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 1929 transitions, 22746 flow, removed 237 selfloop flow, removed 34 redundant places. [2022-01-19 02:36:42,662 INFO L242 Difference]: Finished difference. Result has 579 places, 1022 transitions, 14126 flow [2022-01-19 02:36:42,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=188, PETRI_FLOW=14126, PETRI_PLACES=579, PETRI_TRANSITIONS=1022} [2022-01-19 02:36:42,663 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 458 predicate places. [2022-01-19 02:36:42,663 INFO L470 AbstractCegarLoop]: Abstraction has has 579 places, 1022 transitions, 14126 flow [2022-01-19 02:36:42,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 48.37931034482759) internal successors, (4209), 87 states have internal predecessors, (4209), 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) [2022-01-19 02:36:42,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:36:42,664 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:36:42,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-19 02:36:42,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:36:42,882 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:36:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:36:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash -887718634, now seen corresponding path program 3 times [2022-01-19 02:36:42,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:36:42,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175696615] [2022-01-19 02:36:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:36:42,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:36:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:36:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:36:44,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:36:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175696615] [2022-01-19 02:36:44,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175696615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:36:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133470581] [2022-01-19 02:36:44,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:36:44,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:36:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:36:44,610 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) [2022-01-19 02:36:44,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 02:36:44,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 02:36:44,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:36:44,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-19 02:36:44,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:36:44,715 INFO L387 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 [2022-01-19 02:36:44,894 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:36:44,894 INFO L387 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 [2022-01-19 02:36:45,410 INFO L387 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 [2022-01-19 02:36:45,599 INFO L387 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 [2022-01-19 02:36:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:36:45,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:36:46,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:36:46,500 INFO L387 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 111 treesize of output 95 [2022-01-19 02:36:46,509 INFO L387 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 67 treesize of output 49 [2022-01-19 02:36:47,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 02:36:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:36:47,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133470581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:36:47,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:36:47,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 23, 23] total 67 [2022-01-19 02:36:47,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764457092] [2022-01-19 02:36:47,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:36:47,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-19 02:36:47,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:36:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-19 02:36:47,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4192, Unknown=3, NotChecked=0, Total=4422 [2022-01-19 02:36:47,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 02:36:47,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1022 transitions, 14126 flow. Second operand has 67 states, 67 states have (on average 47.67164179104478) internal successors, (3194), 67 states have internal predecessors, (3194), 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) [2022-01-19 02:36:47,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:36:47,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 02:36:47,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:37:09,033 INFO L129 PetriNetUnfolder]: 8204/16873 cut-off events. [2022-01-19 02:37:09,033 INFO L130 PetriNetUnfolder]: For 390935/390961 co-relation queries the response was YES. [2022-01-19 02:37:09,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117203 conditions, 16873 events. 8204/16873 cut-off events. For 390935/390961 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 161983 event pairs, 542 based on Foata normal form. 26/16846 useless extension candidates. Maximal degree in co-relation 117054. Up to 4003 conditions per place. [2022-01-19 02:37:09,352 INFO L132 encePairwiseOnDemand]: 98/136 looper letters, 725 selfloop transitions, 802 changer transitions 133/1699 dead transitions. [2022-01-19 02:37:09,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1699 transitions, 26532 flow [2022-01-19 02:37:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-19 02:37:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2022-01-19 02:37:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 5908 transitions. [2022-01-19 02:37:09,358 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3681455633100698 [2022-01-19 02:37:09,358 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 5908 transitions. [2022-01-19 02:37:09,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 5908 transitions. [2022-01-19 02:37:09,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:37:09,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 5908 transitions. [2022-01-19 02:37:09,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 119 states, 118 states have (on average 50.067796610169495) internal successors, (5908), 118 states have internal predecessors, (5908), 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) [2022-01-19 02:37:09,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 119 states, 119 states have (on average 136.0) internal successors, (16184), 119 states have internal predecessors, (16184), 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) [2022-01-19 02:37:09,377 INFO L81 ComplementDD]: Finished complementDD. Result has 119 states, 119 states have (on average 136.0) internal successors, (16184), 119 states have internal predecessors, (16184), 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) [2022-01-19 02:37:09,379 INFO L186 Difference]: Start difference. First operand has 579 places, 1022 transitions, 14126 flow. Second operand 118 states and 5908 transitions. [2022-01-19 02:37:09,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1699 transitions, 26532 flow [2022-01-19 02:37:12,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1699 transitions, 24223 flow, removed 1029 selfloop flow, removed 88 redundant places. [2022-01-19 02:37:12,113 INFO L242 Difference]: Finished difference. Result has 605 places, 1197 transitions, 17531 flow [2022-01-19 02:37:12,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=12710, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=618, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=17531, PETRI_PLACES=605, PETRI_TRANSITIONS=1197} [2022-01-19 02:37:12,115 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 484 predicate places. [2022-01-19 02:37:12,115 INFO L470 AbstractCegarLoop]: Abstraction has has 605 places, 1197 transitions, 17531 flow [2022-01-19 02:37:12,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 47.67164179104478) internal successors, (3194), 67 states have internal predecessors, (3194), 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) [2022-01-19 02:37:12,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:37:12,116 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:37:12,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 02:37:12,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:37:12,333 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:37:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:37:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash 722440850, now seen corresponding path program 4 times [2022-01-19 02:37:12,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:37:12,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739329049] [2022-01-19 02:37:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:37:12,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:37:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:37:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:37:13,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:37:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739329049] [2022-01-19 02:37:13,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739329049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:37:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962581551] [2022-01-19 02:37:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:37:13,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:37:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:37:13,336 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) [2022-01-19 02:37:13,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 02:37:13,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:37:13,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:37:13,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-19 02:37:13,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:37:13,433 INFO L387 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 [2022-01-19 02:37:13,656 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:37:13,656 INFO L387 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 [2022-01-19 02:37:14,611 INFO L387 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 [2022-01-19 02:37:14,769 INFO L387 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 25 treesize of output 7 [2022-01-19 02:37:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:37:15,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:37:15,346 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 02:37:15,418 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_#t~post1#1| 1) c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 02:37:15,442 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 02:37:15,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:37:15,458 INFO L387 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 82 treesize of output 74 [2022-01-19 02:37:15,462 INFO L387 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 53 treesize of output 47 [2022-01-19 02:37:15,465 INFO L387 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 47 treesize of output 41 [2022-01-19 02:37:17,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 02:37:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:37:17,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962581551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:37:17,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:37:17,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 83 [2022-01-19 02:37:17,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503050895] [2022-01-19 02:37:17,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:37:17,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-19 02:37:17,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:37:17,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-19 02:37:17,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=5821, Unknown=3, NotChecked=474, Total=6806 [2022-01-19 02:37:17,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 02:37:17,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1197 transitions, 17531 flow. Second operand has 83 states, 83 states have (on average 49.40963855421687) internal successors, (4101), 83 states have internal predecessors, (4101), 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) [2022-01-19 02:37:17,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:37:17,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 02:37:17,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:37:37,404 INFO L129 PetriNetUnfolder]: 10095/20595 cut-off events. [2022-01-19 02:37:37,404 INFO L130 PetriNetUnfolder]: For 595031/595051 co-relation queries the response was YES. [2022-01-19 02:37:37,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157805 conditions, 20595 events. 10095/20595 cut-off events. For 595031/595051 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 201402 event pairs, 858 based on Foata normal form. 152/20678 useless extension candidates. Maximal degree in co-relation 157659. Up to 6099 conditions per place. [2022-01-19 02:37:37,878 INFO L132 encePairwiseOnDemand]: 96/136 looper letters, 974 selfloop transitions, 1039 changer transitions 151/2204 dead transitions. [2022-01-19 02:37:37,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 2204 transitions, 37256 flow [2022-01-19 02:37:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-19 02:37:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2022-01-19 02:37:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 6291 transitions. [2022-01-19 02:37:37,883 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.388717251606525 [2022-01-19 02:37:37,883 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 6291 transitions. [2022-01-19 02:37:37,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 6291 transitions. [2022-01-19 02:37:37,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:37:37,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 6291 transitions. [2022-01-19 02:37:37,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 52.865546218487395) internal successors, (6291), 119 states have internal predecessors, (6291), 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) [2022-01-19 02:37:37,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 136.0) internal successors, (16320), 120 states have internal predecessors, (16320), 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) [2022-01-19 02:37:37,901 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 136.0) internal successors, (16320), 120 states have internal predecessors, (16320), 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) [2022-01-19 02:37:37,901 INFO L186 Difference]: Start difference. First operand has 605 places, 1197 transitions, 17531 flow. Second operand 119 states and 6291 transitions. [2022-01-19 02:37:37,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 2204 transitions, 37256 flow [2022-01-19 02:37:41,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 2204 transitions, 36078 flow, removed 490 selfloop flow, removed 65 redundant places. [2022-01-19 02:37:41,864 INFO L242 Difference]: Finished difference. Result has 688 places, 1618 transitions, 28211 flow [2022-01-19 02:37:41,865 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=16131, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=28211, PETRI_PLACES=688, PETRI_TRANSITIONS=1618} [2022-01-19 02:37:41,865 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 567 predicate places. [2022-01-19 02:37:41,865 INFO L470 AbstractCegarLoop]: Abstraction has has 688 places, 1618 transitions, 28211 flow [2022-01-19 02:37:41,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 49.40963855421687) internal successors, (4101), 83 states have internal predecessors, (4101), 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) [2022-01-19 02:37:41,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:37:41,866 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:37:41,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 02:37:42,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 02:37:42,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:37:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:37:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash -810837532, now seen corresponding path program 5 times [2022-01-19 02:37:42,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:37:42,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31934463] [2022-01-19 02:37:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:37:42,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:37:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:37:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:37:43,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:37:43,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31934463] [2022-01-19 02:37:43,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31934463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:37:43,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637183625] [2022-01-19 02:37:43,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:37:43,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:37:43,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:37:43,292 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) [2022-01-19 02:37:43,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 02:37:43,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:37:43,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:37:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-19 02:37:43,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:37:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:37:44,553 INFO L387 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 [2022-01-19 02:37:44,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:37:44,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-01-19 02:37:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:37:45,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:37:46,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:37:46,108 INFO L387 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 111 treesize of output 95 [2022-01-19 02:37:46,113 INFO L387 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 67 treesize of output 49 [2022-01-19 02:37:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:37:48,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637183625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:37:48,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:37:48,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32, 32] total 88 [2022-01-19 02:37:48,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086685849] [2022-01-19 02:37:48,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:37:48,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-19 02:37:48,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:37:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-19 02:37:48,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=7183, Unknown=1, NotChecked=0, Total=7656 [2022-01-19 02:37:48,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 02:37:48,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 688 places, 1618 transitions, 28211 flow. Second operand has 88 states, 88 states have (on average 48.35227272727273) internal successors, (4255), 88 states have internal predecessors, (4255), 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) [2022-01-19 02:37:48,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:37:48,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 02:37:48,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:10,291 INFO L129 PetriNetUnfolder]: 11661/23872 cut-off events. [2022-01-19 02:38:10,291 INFO L130 PetriNetUnfolder]: For 920830/920946 co-relation queries the response was YES. [2022-01-19 02:38:10,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224510 conditions, 23872 events. 11661/23872 cut-off events. For 920830/920946 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 239302 event pairs, 1872 based on Foata normal form. 16/23822 useless extension candidates. Maximal degree in co-relation 224329. Up to 8625 conditions per place. [2022-01-19 02:38:11,075 INFO L132 encePairwiseOnDemand]: 91/136 looper letters, 658 selfloop transitions, 2012 changer transitions 61/2770 dead transitions. [2022-01-19 02:38:11,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 2770 transitions, 55700 flow [2022-01-19 02:38:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-19 02:38:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-01-19 02:38:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 5311 transitions. [2022-01-19 02:38:11,080 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3684100998890122 [2022-01-19 02:38:11,080 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 5311 transitions. [2022-01-19 02:38:11,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 5311 transitions. [2022-01-19 02:38:11,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:11,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 5311 transitions. [2022-01-19 02:38:11,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 50.10377358490566) internal successors, (5311), 106 states have internal predecessors, (5311), 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) [2022-01-19 02:38:11,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 136.0) internal successors, (14552), 107 states have internal predecessors, (14552), 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) [2022-01-19 02:38:11,096 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 136.0) internal successors, (14552), 107 states have internal predecessors, (14552), 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) [2022-01-19 02:38:11,096 INFO L186 Difference]: Start difference. First operand has 688 places, 1618 transitions, 28211 flow. Second operand 106 states and 5311 transitions. [2022-01-19 02:38:11,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 2770 transitions, 55700 flow [2022-01-19 02:38:18,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 2770 transitions, 53593 flow, removed 938 selfloop flow, removed 63 redundant places. [2022-01-19 02:38:18,762 INFO L242 Difference]: Finished difference. Result has 735 places, 2553 transitions, 53641 flow [2022-01-19 02:38:18,764 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=26944, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=53641, PETRI_PLACES=735, PETRI_TRANSITIONS=2553} [2022-01-19 02:38:18,764 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 614 predicate places. [2022-01-19 02:38:18,764 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 2553 transitions, 53641 flow [2022-01-19 02:38:18,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 48.35227272727273) internal successors, (4255), 88 states have internal predecessors, (4255), 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) [2022-01-19 02:38:18,765 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:18,765 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:38:18,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 02:38:18,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 02:38:18,970 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2002121420, now seen corresponding path program 6 times [2022-01-19 02:38:18,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:18,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394249933] [2022-01-19 02:38:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:18,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:38:19,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:19,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394249933] [2022-01-19 02:38:19,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394249933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:19,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133749783] [2022-01-19 02:38:19,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:38:19,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:19,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:19,794 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:38:19,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 02:38:19,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 02:38:19,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:38:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-19 02:38:19,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:21,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:38:21,141 INFO L387 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 [2022-01-19 02:38:21,298 INFO L387 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 19 treesize of output 7 [2022-01-19 02:38:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:38:21,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:22,035 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_#t~post1#1| 1) c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) is different from false [2022-01-19 02:38:22,047 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) is different from false [2022-01-19 02:38:22,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:22,103 INFO L387 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 82 treesize of output 74 [2022-01-19 02:38:22,110 INFO L387 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 53 treesize of output 47 [2022-01-19 02:38:22,117 INFO L387 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 47 treesize of output 41 [2022-01-19 02:38:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:38:23,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133749783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:23,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:23,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 84 [2022-01-19 02:38:23,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828783918] [2022-01-19 02:38:23,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-19 02:38:23,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-19 02:38:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6128, Unknown=2, NotChecked=322, Total=6972 [2022-01-19 02:38:23,712 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 02:38:23,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 2553 transitions, 53641 flow. Second operand has 84 states, 84 states have (on average 48.464285714285715) internal successors, (4071), 84 states have internal predecessors, (4071), 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) [2022-01-19 02:38:23,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:23,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 02:38:23,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:31,489 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse14 (* c_~q_front~0 4))) (let ((.cse15 (+ c_~s~0 1)) (.cse18 (+ c_~N~0 |c_thread2Thread1of1ForFork0_~j~0#1|)) (.cse19 (* 4 c_~q_back~0)) (.cse16 (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1)) (.cse13 (+ .cse14 c_~q~0.offset))) (let ((.cse2 (<= 0 c_~q_front~0)) (.cse7 (= (select (select |c_#memory_int| c_~q~0.base) .cse13) 1)) (.cse4 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~q~0.base))) (.cse10 (<= .cse16 c_~N~0)) (.cse11 (= |c_thread1Thread1of1ForFork1_~i~0#1| 0)) (.cse1 (<= .cse13 0)) (.cse3 (<= 1 c_~N~0)) (.cse5 (= c_~s~0 0)) (.cse6 (= |c_thread1Thread1of1ForFork1_#t~post1#1| 0)) (.cse12 (+ c_~q~0.offset .cse19)) (.cse17 (<= c_~n~0 2)) (.cse8 (<= .cse15 .cse18)) (.cse9 (= |c_thread2Thread1of1ForFork0_~j~0#1| 1)) (.cse0 (<= (* c_~n~0 4) (+ c_~q~0.offset 3 .cse19)))) (and (<= |c_thread1Thread1of1ForFork1_~i~0#1| 1) (or .cse0 (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7)) (or .cse0 (and (<= |c_thread2Thread1of1ForFork0_~j~0#1| c_~s~0) .cse8 .cse9 .cse6)) (or (and .cse1 .cse2 .cse4 .cse5 .cse10 .cse11 .cse7) .cse0) (= c_~s~0 1) (or (not (= .cse12 0)) (and (or (and .cse4 .cse5 .cse10 .cse11) (not (= .cse13 0))) (or .cse1 (<= (+ c_~q_front~0 c_~n~0) (+ 2 c_~q_back~0))) (< 0 (+ .cse14 c_~q~0.offset 1)))) (or (not (= |c_thread2Thread1of1ForFork0_~j~0#1| 0)) (and (<= c_~N~0 c_~s~0) (<= c_~s~0 c_~N~0))) (or (and .cse3 .cse5 .cse9 .cse6) .cse0) (or (and (<= (+ |c_thread1Thread1of1ForFork1_~i~0#1| |c_thread2Thread1of1ForFork0_~j~0#1|) .cse15) .cse8 .cse9) .cse0) (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< .cse16 c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) (or (<= .cse12 0) .cse17) (< 0 c_~N~0) (< 0 c_~n~0) (= c_~q~0.offset 0) (<= 1 c_~q_back~0) .cse17 (or (and .cse8 .cse9 (<= .cse18 .cse15)) .cse0))))) is different from false [2022-01-19 02:38:55,716 INFO L129 PetriNetUnfolder]: 15449/31226 cut-off events. [2022-01-19 02:38:55,716 INFO L130 PetriNetUnfolder]: For 1602386/1602516 co-relation queries the response was YES. [2022-01-19 02:38:57,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343026 conditions, 31226 events. 15449/31226 cut-off events. For 1602386/1602516 co-relation queries the response was YES. Maximal size of possible extension queue 1565. Compared 323165 event pairs, 704 based on Foata normal form. 55/31209 useless extension candidates. Maximal degree in co-relation 342834. Up to 6811 conditions per place. [2022-01-19 02:38:57,330 INFO L132 encePairwiseOnDemand]: 96/136 looper letters, 1244 selfloop transitions, 2649 changer transitions 175/4107 dead transitions. [2022-01-19 02:38:57,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 4107 transitions, 96969 flow [2022-01-19 02:38:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-19 02:38:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2022-01-19 02:38:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 7259 transitions. [2022-01-19 02:38:57,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37588028169014087 [2022-01-19 02:38:57,336 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 7259 transitions. [2022-01-19 02:38:57,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 7259 transitions. [2022-01-19 02:38:57,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:57,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 7259 transitions. [2022-01-19 02:38:57,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 51.11971830985915) internal successors, (7259), 142 states have internal predecessors, (7259), 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) [2022-01-19 02:38:57,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 136.0) internal successors, (19448), 143 states have internal predecessors, (19448), 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) [2022-01-19 02:38:57,356 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 136.0) internal successors, (19448), 143 states have internal predecessors, (19448), 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) [2022-01-19 02:38:57,356 INFO L186 Difference]: Start difference. First operand has 735 places, 2553 transitions, 53641 flow. Second operand 142 states and 7259 transitions. [2022-01-19 02:38:57,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 4107 transitions, 96969 flow [2022-01-19 02:39:17,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 4107 transitions, 94227 flow, removed 1290 selfloop flow, removed 34 redundant places. [2022-01-19 02:39:17,970 INFO L242 Difference]: Finished difference. Result has 881 places, 3456 transitions, 82613 flow [2022-01-19 02:39:17,972 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=52113, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=82613, PETRI_PLACES=881, PETRI_TRANSITIONS=3456} [2022-01-19 02:39:17,973 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 760 predicate places. [2022-01-19 02:39:17,973 INFO L470 AbstractCegarLoop]: Abstraction has has 881 places, 3456 transitions, 82613 flow [2022-01-19 02:39:17,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 48.464285714285715) internal successors, (4071), 84 states have internal predecessors, (4071), 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) [2022-01-19 02:39:17,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:39:17,973 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:39:17,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 02:39:18,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 02:39:18,187 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:39:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:39:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash -859918472, now seen corresponding path program 7 times [2022-01-19 02:39:18,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:39:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204472164] [2022-01-19 02:39:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:39:18,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:39:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:39:19,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:39:19,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204472164] [2022-01-19 02:39:19,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204472164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:39:19,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750244542] [2022-01-19 02:39:19,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:39:19,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:39:19,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:39:19,448 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:39:19,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 02:39:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:19,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-19 02:39:19,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:39:19,543 INFO L387 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 [2022-01-19 02:39:19,799 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:39:19,800 INFO L387 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 [2022-01-19 02:39:21,005 INFO L387 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 [2022-01-19 02:39:21,225 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 02:39:21,226 INFO L387 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 24 treesize of output 10 [2022-01-19 02:39:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:39:21,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:39:22,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:39:22,337 INFO L387 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 111 treesize of output 95 [2022-01-19 02:39:22,341 INFO L387 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 67 treesize of output 49 [2022-01-19 02:39:24,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 02:39:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:39:24,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750244542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:39:24,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:39:24,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32, 32] total 88 [2022-01-19 02:39:24,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783729295] [2022-01-19 02:39:24,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:39:24,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-19 02:39:24,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:39:24,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-19 02:39:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=7075, Unknown=6, NotChecked=0, Total=7656 [2022-01-19 02:39:24,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 02:39:24,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 3456 transitions, 82613 flow. Second operand has 88 states, 88 states have (on average 49.28409090909091) internal successors, (4337), 88 states have internal predecessors, (4337), 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) [2022-01-19 02:39:24,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:39:24,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 02:39:24,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:40:08,686 INFO L129 PetriNetUnfolder]: 17043/34495 cut-off events. [2022-01-19 02:40:08,686 INFO L130 PetriNetUnfolder]: For 2074350/2074477 co-relation queries the response was YES. [2022-01-19 02:40:10,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404859 conditions, 34495 events. 17043/34495 cut-off events. For 2074350/2074477 co-relation queries the response was YES. Maximal size of possible extension queue 1792. Compared 363321 event pairs, 1640 based on Foata normal form. 26/34387 useless extension candidates. Maximal degree in co-relation 404621. Up to 16099 conditions per place. [2022-01-19 02:40:11,193 INFO L132 encePairwiseOnDemand]: 92/136 looper letters, 1835 selfloop transitions, 2566 changer transitions 56/4497 dead transitions. [2022-01-19 02:40:11,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 4497 transitions, 118091 flow [2022-01-19 02:40:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-19 02:40:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-01-19 02:40:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4579 transitions. [2022-01-19 02:40:11,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3783046926635823 [2022-01-19 02:40:11,198 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4579 transitions. [2022-01-19 02:40:11,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4579 transitions. [2022-01-19 02:40:11,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:40:11,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4579 transitions. [2022-01-19 02:40:11,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 51.449438202247194) internal successors, (4579), 89 states have internal predecessors, (4579), 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) [2022-01-19 02:40:11,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 136.0) internal successors, (12240), 90 states have internal predecessors, (12240), 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) [2022-01-19 02:40:11,213 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 136.0) internal successors, (12240), 90 states have internal predecessors, (12240), 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) [2022-01-19 02:40:11,213 INFO L186 Difference]: Start difference. First operand has 881 places, 3456 transitions, 82613 flow. Second operand 89 states and 4579 transitions. [2022-01-19 02:40:11,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 4497 transitions, 118091 flow [2022-01-19 02:40:40,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 4497 transitions, 116189 flow, removed 805 selfloop flow, removed 67 redundant places. [2022-01-19 02:40:40,581 INFO L242 Difference]: Finished difference. Result has 911 places, 4197 transitions, 112383 flow [2022-01-19 02:40:40,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=81364, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=112383, PETRI_PLACES=911, PETRI_TRANSITIONS=4197} [2022-01-19 02:40:40,584 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 790 predicate places. [2022-01-19 02:40:40,584 INFO L470 AbstractCegarLoop]: Abstraction has has 911 places, 4197 transitions, 112383 flow [2022-01-19 02:40:40,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 49.28409090909091) internal successors, (4337), 88 states have internal predecessors, (4337), 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) [2022-01-19 02:40:40,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:40:40,585 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:40:40,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 02:40:40,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 02:40:40,800 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:40:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:40:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash 288974610, now seen corresponding path program 8 times [2022-01-19 02:40:40,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:40:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223014992] [2022-01-19 02:40:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:40:40,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:40:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:40:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:40:41,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:40:41,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223014992] [2022-01-19 02:40:41,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223014992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:40:41,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39746680] [2022-01-19 02:40:41,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:40:41,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:40:41,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:40:41,797 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:40:41,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 02:40:41,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:40:41,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:40:41,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-19 02:40:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:40:42,443 INFO L387 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 [2022-01-19 02:40:42,699 INFO L387 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 [2022-01-19 02:40:43,122 INFO L387 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 [2022-01-19 02:40:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:40:43,485 INFO L387 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 [2022-01-19 02:40:43,652 INFO L387 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 19 treesize of output 7 [2022-01-19 02:40:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:40:44,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:40:48,014 INFO L353 Elim1Store]: treesize reduction 28, result has 54.8 percent of original size [2022-01-19 02:40:48,014 INFO L387 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 2 case distinctions, treesize of input 148 treesize of output 105 [2022-01-19 02:40:48,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:40:48,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 524 treesize of output 508 [2022-01-19 02:40:48,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:40:48,055 INFO L387 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 383 treesize of output 357 [2022-01-19 02:40:48,066 INFO L387 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 387 treesize of output 315 [2022-01-19 02:40:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:40:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39746680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:40:51,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:40:51,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 35] total 91 [2022-01-19 02:40:51,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282762627] [2022-01-19 02:40:51,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:40:51,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-19 02:40:51,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:40:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-19 02:40:51,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=7458, Unknown=83, NotChecked=0, Total=8190 [2022-01-19 02:40:51,525 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 02:40:51,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 4197 transitions, 112383 flow. Second operand has 91 states, 91 states have (on average 47.26373626373626) internal successors, (4301), 91 states have internal predecessors, (4301), 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) [2022-01-19 02:40:51,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:40:51,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 02:40:51,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:41:55,051 INFO L129 PetriNetUnfolder]: 17824/36115 cut-off events. [2022-01-19 02:41:55,051 INFO L130 PetriNetUnfolder]: For 2797867/2798049 co-relation queries the response was YES. [2022-01-19 02:41:57,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 468295 conditions, 36115 events. 17824/36115 cut-off events. For 2797867/2798049 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 383423 event pairs, 533 based on Foata normal form. 44/36074 useless extension candidates. Maximal degree in co-relation 468049. Up to 8139 conditions per place. [2022-01-19 02:41:57,649 INFO L132 encePairwiseOnDemand]: 94/136 looper letters, 1050 selfloop transitions, 3971 changer transitions 81/5141 dead transitions. [2022-01-19 02:41:57,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 5141 transitions, 146872 flow [2022-01-19 02:41:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-19 02:41:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2022-01-19 02:41:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 5406 transitions. [2022-01-19 02:41:57,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3646788990825688 [2022-01-19 02:41:57,653 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 5406 transitions. [2022-01-19 02:41:57,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 5406 transitions. [2022-01-19 02:41:57,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:41:57,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 5406 transitions. [2022-01-19 02:41:57,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 49.596330275229356) internal successors, (5406), 109 states have internal predecessors, (5406), 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) [2022-01-19 02:41:57,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 136.0) internal successors, (14960), 110 states have internal predecessors, (14960), 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) [2022-01-19 02:41:57,677 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 136.0) internal successors, (14960), 110 states have internal predecessors, (14960), 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) [2022-01-19 02:41:57,678 INFO L186 Difference]: Start difference. First operand has 911 places, 4197 transitions, 112383 flow. Second operand 109 states and 5406 transitions. [2022-01-19 02:41:57,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 5141 transitions, 146872 flow [2022-01-19 02:42:47,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 5141 transitions, 144852 flow, removed 911 selfloop flow, removed 56 redundant places. [2022-01-19 02:42:47,180 INFO L242 Difference]: Finished difference. Result has 981 places, 4841 transitions, 143398 flow [2022-01-19 02:42:47,183 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=111157, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=143398, PETRI_PLACES=981, PETRI_TRANSITIONS=4841} [2022-01-19 02:42:47,184 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 860 predicate places. [2022-01-19 02:42:47,184 INFO L470 AbstractCegarLoop]: Abstraction has has 981 places, 4841 transitions, 143398 flow [2022-01-19 02:42:47,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 47.26373626373626) internal successors, (4301), 91 states have internal predecessors, (4301), 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) [2022-01-19 02:42:47,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:42:47,184 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:42:47,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 02:42:47,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 02:42:47,387 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:42:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:42:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1092412622, now seen corresponding path program 9 times [2022-01-19 02:42:47,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:42:47,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214743805] [2022-01-19 02:42:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:42:47,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:42:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:42:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:42:48,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:42:48,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214743805] [2022-01-19 02:42:48,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214743805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:42:48,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282047086] [2022-01-19 02:42:48,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:42:48,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:42:48,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:42:48,571 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:42:48,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 02:42:48,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 02:42:48,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:42:48,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-19 02:42:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:42:48,674 INFO L387 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 [2022-01-19 02:42:48,838 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:42:48,838 INFO L387 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 [2022-01-19 02:42:49,343 INFO L387 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 [2022-01-19 02:42:49,430 INFO L387 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 [2022-01-19 02:42:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:42:49,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:42:50,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:42:50,319 INFO L387 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 111 treesize of output 95 [2022-01-19 02:42:50,322 INFO L387 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 67 treesize of output 49 [2022-01-19 02:42:51,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 02:42:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:42:51,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282047086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:42:51,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:42:51,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23, 23] total 66 [2022-01-19 02:42:51,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904867229] [2022-01-19 02:42:51,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:42:51,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-19 02:42:51,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:42:51,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-19 02:42:51,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4064, Unknown=3, NotChecked=0, Total=4290 [2022-01-19 02:42:51,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 02:42:51,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 981 places, 4841 transitions, 143398 flow. Second operand has 66 states, 66 states have (on average 47.68181818181818) internal successors, (3147), 66 states have internal predecessors, (3147), 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) [2022-01-19 02:42:51,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:42:51,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 02:42:51,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:44:02,135 INFO L129 PetriNetUnfolder]: 18955/38157 cut-off events. [2022-01-19 02:44:02,135 INFO L130 PetriNetUnfolder]: For 3716994/3717176 co-relation queries the response was YES. [2022-01-19 02:44:04,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 550723 conditions, 38157 events. 18955/38157 cut-off events. For 3716994/3717176 co-relation queries the response was YES. Maximal size of possible extension queue 2011. Compared 404743 event pairs, 777 based on Foata normal form. 49/38083 useless extension candidates. Maximal degree in co-relation 550461. Up to 12904 conditions per place. [2022-01-19 02:44:04,871 INFO L132 encePairwiseOnDemand]: 98/136 looper letters, 2169 selfloop transitions, 3405 changer transitions 97/5710 dead transitions. [2022-01-19 02:44:04,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1058 places, 5710 transitions, 179802 flow [2022-01-19 02:44:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-19 02:44:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-01-19 02:44:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 4598 transitions. [2022-01-19 02:44:04,874 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3635357368753953 [2022-01-19 02:44:04,874 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 4598 transitions. [2022-01-19 02:44:04,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 4598 transitions. [2022-01-19 02:44:04,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:44:04,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 4598 transitions. [2022-01-19 02:44:04,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 49.44086021505376) internal successors, (4598), 93 states have internal predecessors, (4598), 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) [2022-01-19 02:44:04,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 136.0) internal successors, (12784), 94 states have internal predecessors, (12784), 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) [2022-01-19 02:44:04,885 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 136.0) internal successors, (12784), 94 states have internal predecessors, (12784), 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) [2022-01-19 02:44:04,885 INFO L186 Difference]: Start difference. First operand has 981 places, 4841 transitions, 143398 flow. Second operand 93 states and 4598 transitions. [2022-01-19 02:44:04,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1058 places, 5710 transitions, 179802 flow [2022-01-19 02:45:13,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1005 places, 5710 transitions, 176652 flow, removed 1450 selfloop flow, removed 53 redundant places. [2022-01-19 02:45:13,782 INFO L242 Difference]: Finished difference. Result has 1024 places, 5264 transitions, 165280 flow [2022-01-19 02:45:13,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=141297, PETRI_DIFFERENCE_MINUEND_PLACES=913, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2974, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=165280, PETRI_PLACES=1024, PETRI_TRANSITIONS=5264} [2022-01-19 02:45:13,786 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 903 predicate places. [2022-01-19 02:45:13,786 INFO L470 AbstractCegarLoop]: Abstraction has has 1024 places, 5264 transitions, 165280 flow [2022-01-19 02:45:13,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 47.68181818181818) internal successors, (3147), 66 states have internal predecessors, (3147), 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) [2022-01-19 02:45:13,786 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:45:13,786 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:45:13,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 02:45:13,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 02:45:13,992 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:45:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:45:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash 232497836, now seen corresponding path program 10 times [2022-01-19 02:45:13,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:45:13,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439897874] [2022-01-19 02:45:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:45:13,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:45:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:45:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:45:14,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:45:14,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439897874] [2022-01-19 02:45:14,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439897874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:45:14,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782543153] [2022-01-19 02:45:14,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:45:14,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:45:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:45:14,851 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:45:14,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 02:45:14,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:45:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:45:14,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-19 02:45:14,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:45:14,968 INFO L387 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 [2022-01-19 02:45:15,157 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:45:15,157 INFO L387 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 [2022-01-19 02:45:15,995 INFO L387 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 19 treesize of output 21 [2022-01-19 02:45:16,161 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 02:45:16,162 INFO L387 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 24 treesize of output 10 [2022-01-19 02:45:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:45:16,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:45:17,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:45:17,128 INFO L387 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 111 treesize of output 95 [2022-01-19 02:45:17,132 INFO L387 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 67 treesize of output 49 [2022-01-19 02:45:19,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 02:45:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:45:19,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782543153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:45:19,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:45:19,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 82 [2022-01-19 02:45:19,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280442489] [2022-01-19 02:45:19,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:45:19,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-19 02:45:19,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:45:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-19 02:45:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=6058, Unknown=3, NotChecked=0, Total=6642 [2022-01-19 02:45:19,029 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 02:45:19,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 5264 transitions, 165280 flow. Second operand has 82 states, 82 states have (on average 49.28048780487805) internal successors, (4041), 82 states have internal predecessors, (4041), 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) [2022-01-19 02:45:19,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:45:19,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 02:45:19,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:46:44,585 INFO L129 PetriNetUnfolder]: 20375/41324 cut-off events. [2022-01-19 02:46:44,585 INFO L130 PetriNetUnfolder]: For 3730717/3730916 co-relation queries the response was YES. [2022-01-19 02:46:47,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583289 conditions, 41324 events. 20375/41324 cut-off events. For 3730717/3730916 co-relation queries the response was YES. Maximal size of possible extension queue 2113. Compared 444511 event pairs, 2318 based on Foata normal form. 44/41209 useless extension candidates. Maximal degree in co-relation 583021. Up to 24157 conditions per place. [2022-01-19 02:46:48,100 INFO L132 encePairwiseOnDemand]: 94/136 looper letters, 3444 selfloop transitions, 2771 changer transitions 59/6314 dead transitions. [2022-01-19 02:46:48,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 6314 transitions, 211320 flow [2022-01-19 02:46:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-19 02:46:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-01-19 02:46:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 5345 transitions. [2022-01-19 02:46:48,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3778987556561086 [2022-01-19 02:46:48,104 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 5345 transitions. [2022-01-19 02:46:48,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 5345 transitions. [2022-01-19 02:46:48,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:46:48,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 5345 transitions. [2022-01-19 02:46:48,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 51.39423076923077) internal successors, (5345), 104 states have internal predecessors, (5345), 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) [2022-01-19 02:46:48,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 136.0) internal successors, (14280), 105 states have internal predecessors, (14280), 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) [2022-01-19 02:46:48,118 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 136.0) internal successors, (14280), 105 states have internal predecessors, (14280), 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) [2022-01-19 02:46:48,118 INFO L186 Difference]: Start difference. First operand has 1024 places, 5264 transitions, 165280 flow. Second operand 104 states and 5345 transitions. [2022-01-19 02:46:48,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 6314 transitions, 211320 flow [2022-01-19 02:47:57,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1051 places, 6314 transitions, 210480 flow, removed 295 selfloop flow, removed 53 redundant places. [2022-01-19 02:47:57,995 INFO L242 Difference]: Finished difference. Result has 1084 places, 5987 transitions, 201609 flow [2022-01-19 02:47:57,999 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=164530, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2074, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=201609, PETRI_PLACES=1084, PETRI_TRANSITIONS=5987} [2022-01-19 02:47:57,999 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 963 predicate places. [2022-01-19 02:47:57,999 INFO L470 AbstractCegarLoop]: Abstraction has has 1084 places, 5987 transitions, 201609 flow [2022-01-19 02:47:58,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 49.28048780487805) internal successors, (4041), 82 states have internal predecessors, (4041), 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) [2022-01-19 02:47:58,000 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:47:58,000 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:47:58,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 02:47:58,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:47:58,208 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:47:58,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:47:58,208 INFO L85 PathProgramCache]: Analyzing trace with hash 744266758, now seen corresponding path program 11 times [2022-01-19 02:47:58,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:47:58,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558278974] [2022-01-19 02:47:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:47:58,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:47:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:47:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:47:59,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:47:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558278974] [2022-01-19 02:47:59,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558278974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:47:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29343645] [2022-01-19 02:47:59,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:47:59,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:47:59,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:47:59,036 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:47:59,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 02:47:59,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:47:59,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:47:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-19 02:47:59,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:47:59,138 INFO L387 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 [2022-01-19 02:47:59,280 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:47:59,281 INFO L387 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 [2022-01-19 02:47:59,737 INFO L387 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 [2022-01-19 02:47:59,871 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 02:47:59,872 INFO L387 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 24 treesize of output 10 [2022-01-19 02:48:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:48:00,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:48:00,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:48:00,715 INFO L387 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 111 treesize of output 95 [2022-01-19 02:48:00,719 INFO L387 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 67 treesize of output 49 [2022-01-19 02:48:02,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 02:48:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:48:02,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29343645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:48:02,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:48:02,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 23] total 67 [2022-01-19 02:48:02,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375432960] [2022-01-19 02:48:02,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:48:02,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-19 02:48:02,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:48:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-19 02:48:02,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=4089, Unknown=1, NotChecked=0, Total=4422 [2022-01-19 02:48:02,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 02:48:02,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1084 places, 5987 transitions, 201609 flow. Second operand has 67 states, 67 states have (on average 49.865671641791046) internal successors, (3341), 67 states have internal predecessors, (3341), 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) [2022-01-19 02:48:02,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:48:02,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 02:48:02,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 02:48:50,284 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 02:48:50,284 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 02:48:51,400 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 02:48:51,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-19 02:48:51,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-01-19 02:48:51,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:48:51,602 WARN L594 AbstractCegarLoop]: Verification canceled: while executing Executor. [2022-01-19 02:48:51,603 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 02:48:51,603 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 02:48:51,608 INFO L732 BasicCegarLoop]: Path program histogram: [11, 3, 2, 1, 1, 1] [2022-01-19 02:48:51,610 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 02:48:51,610 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 02:48:51,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:48:51 BasicIcfg [2022-01-19 02:48:51,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 02:48:51,612 INFO L158 Benchmark]: Toolchain (without parser) took 794029.92ms. Allocated memory was 373.3MB in the beginning and 8.7GB in the end (delta: 8.3GB). Free memory was 316.1MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 6.4GB. Max. memory is 16.0GB. [2022-01-19 02:48:51,612 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 332.3MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 02:48:51,612 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.51ms. Allocated memory was 373.3MB in the beginning and 515.9MB in the end (delta: 142.6MB). Free memory was 315.9MB in the beginning and 484.2MB in the end (delta: -168.3MB). Peak memory consumption was 9.9MB. Max. memory is 16.0GB. [2022-01-19 02:48:51,612 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.96ms. Allocated memory is still 515.9MB. Free memory was 484.2MB in the beginning and 482.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 02:48:51,612 INFO L158 Benchmark]: Boogie Preprocessor took 31.09ms. Allocated memory is still 515.9MB. Free memory was 482.1MB in the beginning and 481.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 02:48:51,612 INFO L158 Benchmark]: RCFGBuilder took 417.73ms. Allocated memory is still 515.9MB. Free memory was 480.0MB in the beginning and 458.0MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2022-01-19 02:48:51,613 INFO L158 Benchmark]: TraceAbstraction took 793265.00ms. Allocated memory was 515.9MB in the beginning and 8.7GB in the end (delta: 8.2GB). Free memory was 457.0MB in the beginning and 5.3GB in the end (delta: -4.9GB). Peak memory consumption was 6.4GB. Max. memory is 16.0GB. [2022-01-19 02:48:51,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 332.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 271.51ms. Allocated memory was 373.3MB in the beginning and 515.9MB in the end (delta: 142.6MB). Free memory was 315.9MB in the beginning and 484.2MB in the end (delta: -168.3MB). Peak memory consumption was 9.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.96ms. Allocated memory is still 515.9MB. Free memory was 484.2MB in the beginning and 482.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.09ms. Allocated memory is still 515.9MB. Free memory was 482.1MB in the beginning and 481.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 417.73ms. Allocated memory is still 515.9MB. Free memory was 480.0MB in the beginning and 458.0MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 793265.00ms. Allocated memory was 515.9MB in the beginning and 8.7GB in the end (delta: 8.2GB). Free memory was 457.0MB in the beginning and 5.3GB in the end (delta: -4.9GB). Peak memory consumption was 6.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 146 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 793.1s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 722.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20984 SdHoareTripleChecker+Valid, 23.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20984 mSDsluCounter, 27804 SdHoareTripleChecker+Invalid, 19.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12962 IncrementalHoareTripleChecker+Unchecked, 35521 mSDsCounter, 4599 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51547 IncrementalHoareTripleChecker+Invalid, 69108 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4599 mSolverCounterUnsat, 955 mSDtfsCounter, 51547 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5355 GetRequests, 3002 SyntacticMatches, 165 SemanticMatches, 2188 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 128804 ImplicationChecksByTransitivity, 134.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201609occurred in iteration=18, InterpolantAutomatonStates: 1316, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 65.3s InterpolantComputationTime, 4039 NumberOfCodeBlocks, 3998 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 5694 ConstructedInterpolants, 352 QuantifiedInterpolants, 100552 SizeOfPredicates, 410 NumberOfNonLiveVariables, 4176 ConjunctsInSsa, 698 ConjunctsInUnsatCore, 48 InterpolantComputations, 5 PerfectInterpolantSequences, 84/540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown