/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/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 02:50:50,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 02:50:50,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 02:50:50,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 02:50:50,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 02:50:50,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 02:50:50,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 02:50:50,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 02:50:50,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 02:50:50,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 02:50:50,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 02:50:50,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 02:50:50,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 02:50:50,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 02:50:50,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 02:50:50,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 02:50:50,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 02:50:50,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 02:50:50,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 02:50:50,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 02:50:50,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 02:50:50,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 02:50:50,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 02:50:50,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 02:50:50,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 02:50:50,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 02:50:50,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 02:50:50,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 02:50:50,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 02:50:50,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 02:50:50,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 02:50:50,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 02:50:50,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 02:50:50,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 02:50:50,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 02:50:50,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 02:50:50,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 02:50:50,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 02:50:50,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 02:50:50,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 02:50:50,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 02:50:50,700 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 02:50:50,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 02:50:50,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 02:50:50,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 02:50:50,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 02:50:50,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 02:50:50,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 02:50:50,722 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 02:50:50,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 02:50:50,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 02:50:50,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:50:50,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 02:50:50,724 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 02:50:50,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 02:50:50,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 02:50:50,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 02:50:50,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 02:50:50,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 02:50:50,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 02:50:50,874 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 02:50:50,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2022-01-19 02:50:50,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20eade7e/08bb0f9b4fb64c4bb9472da03556c28b/FLAG0d0bd7d6f [2022-01-19 02:50:51,271 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 02:50:51,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2022-01-19 02:50:51,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20eade7e/08bb0f9b4fb64c4bb9472da03556c28b/FLAG0d0bd7d6f [2022-01-19 02:50:51,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20eade7e/08bb0f9b4fb64c4bb9472da03556c28b [2022-01-19 02:50:51,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 02:50:51,706 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 02:50:51,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 02:50:51,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 02:50:51,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 02:50:51,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b4b85e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51, skipping insertion in model container [2022-01-19 02:50:51,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 02:50:51,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 02:50:51,849 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/test-context1.wvr.c[2433,2446] [2022-01-19 02:50:51,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:50:51,857 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 02:50:51,869 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/test-context1.wvr.c[2433,2446] [2022-01-19 02:50:51,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:50:51,882 INFO L208 MainTranslator]: Completed translation [2022-01-19 02:50:51,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51 WrapperNode [2022-01-19 02:50:51,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 02:50:51,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 02:50:51,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 02:50:51,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 02:50:51,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,906 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-01-19 02:50:51,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 02:50:51,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 02:50:51,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 02:50:51,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 02:50:51,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 02:50:51,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 02:50:51,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 02:50:51,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 02:50:51,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (1/1) ... [2022-01-19 02:50:51,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:50:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:50:51,967 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 02:50:51,977 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 02:50:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 02:50:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 02:50:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 02:50:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 02:50:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 02:50:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 02:50:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 02:50:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 02:50:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 02:50:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 02:50:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 02:50:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 02:50:51,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 02:50:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 02:50:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 02:50:51,997 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 02:50:52,055 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 02:50:52,056 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 02:50:52,260 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 02:50:52,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 02:50:52,307 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 02:50:52,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:50:52 BoogieIcfgContainer [2022-01-19 02:50:52,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 02:50:52,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 02:50:52,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 02:50:52,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 02:50:52,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:50:51" (1/3) ... [2022-01-19 02:50:52,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ca9d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:50:52, skipping insertion in model container [2022-01-19 02:50:52,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:51" (2/3) ... [2022-01-19 02:50:52,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ca9d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:50:52, skipping insertion in model container [2022-01-19 02:50:52,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:50:52" (3/3) ... [2022-01-19 02:50:52,316 INFO L111 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-01-19 02:50:52,319 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 02:50:52,319 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 02:50:52,320 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 02:50:52,341 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,342 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,342 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,342 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,342 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,342 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,342 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,342 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,343 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,343 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,343 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,343 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,343 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,343 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,343 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,343 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,344 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,344 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,344 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,344 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,344 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,345 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,345 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,345 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,345 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,345 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,345 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,345 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,346 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,347 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,347 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,347 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,347 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,347 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,349 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,349 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,349 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,349 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,350 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,350 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,351 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,351 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,351 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,351 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,351 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,351 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:52,353 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 02:50:52,382 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 02:50:52,387 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 02:50:52,387 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 02:50:52,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-01-19 02:50:52,429 INFO L129 PetriNetUnfolder]: 9/114 cut-off events. [2022-01-19 02:50:52,429 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:50:52,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-01-19 02:50:52,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-01-19 02:50:52,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-01-19 02:50:52,457 INFO L129 PetriNetUnfolder]: 9/104 cut-off events. [2022-01-19 02:50:52,457 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:50:52,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:52,458 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] [2022-01-19 02:50:52,458 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:52,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1304387571, now seen corresponding path program 1 times [2022-01-19 02:50:52,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:52,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694767563] [2022-01-19 02:50:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:52,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:52,643 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 02:50:52,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:52,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694767563] [2022-01-19 02:50:52,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694767563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:50:52,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:50:52,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 02:50:52,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943210587] [2022-01-19 02:50:52,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:52,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 02:50:52,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 02:50:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 02:50:52,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-01-19 02:50:52,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 02:50:52,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:52,694 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-01-19 02:50:52,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:52,748 INFO L129 PetriNetUnfolder]: 5/101 cut-off events. [2022-01-19 02:50:52,749 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 02:50:52,751 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2022-01-19 02:50:52,752 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2022-01-19 02:50:52,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2022-01-19 02:50:52,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 02:50:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 02:50:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-01-19 02:50:52,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2022-01-19 02:50:52,767 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-01-19 02:50:52,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-01-19 02:50:52,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:52,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-01-19 02:50:52,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 02:50:52,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 02:50:52,781 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 02:50:52,783 INFO L186 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2022-01-19 02:50:52,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2022-01-19 02:50:52,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 02:50:52,790 INFO L242 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2022-01-19 02:50:52,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2022-01-19 02:50:52,796 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2022-01-19 02:50:52,796 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2022-01-19 02:50:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 02:50:52,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:52,796 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] [2022-01-19 02:50:52,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 02:50:52,797 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1861027578, now seen corresponding path program 1 times [2022-01-19 02:50:52,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:52,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653027148] [2022-01-19 02:50:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:52,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:52,928 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 02:50:52,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653027148] [2022-01-19 02:50:52,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653027148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:50:52,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:50:52,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:50:52,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714893269] [2022-01-19 02:50:52,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:52,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:50:52,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:50:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:50:52,932 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 02:50:52,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 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 02:50:52,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:52,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 02:50:52,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:53,022 INFO L129 PetriNetUnfolder]: 7/120 cut-off events. [2022-01-19 02:50:53,023 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-01-19 02:50:53,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-01-19 02:50:53,024 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2022-01-19 02:50:53,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2022-01-19 02:50:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 02:50:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 02:50:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2022-01-19 02:50:53,027 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2022-01-19 02:50:53,027 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2022-01-19 02:50:53,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2022-01-19 02:50:53,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:53,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2022-01-19 02:50:53,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 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 02:50:53,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 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 02:50:53,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 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 02:50:53,030 INFO L186 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2022-01-19 02:50:53,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2022-01-19 02:50:53,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 02:50:53,032 INFO L242 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2022-01-19 02:50:53,033 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-01-19 02:50:53,033 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2022-01-19 02:50:53,033 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2022-01-19 02:50:53,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 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 02:50:53,034 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:53,034 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] [2022-01-19 02:50:53,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 02:50:53,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1965846470, now seen corresponding path program 1 times [2022-01-19 02:50:53,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:53,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101993266] [2022-01-19 02:50:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:53,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:53,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101993266] [2022-01-19 02:50:53,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101993266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:50:53,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:50:53,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 02:50:53,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623115247] [2022-01-19 02:50:53,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:53,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 02:50:53,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 02:50:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 02:50:53,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 02:50:53,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 02:50:53,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:53,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 02:50:53,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:53,142 INFO L129 PetriNetUnfolder]: 8/138 cut-off events. [2022-01-19 02:50:53,142 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-01-19 02:50:53,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2022-01-19 02:50:53,143 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2022-01-19 02:50:53,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2022-01-19 02:50:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 02:50:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 02:50:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-01-19 02:50:53,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2022-01-19 02:50:53,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-01-19 02:50:53,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-01-19 02:50:53,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:53,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-01-19 02:50:53,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 02:50:53,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 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 02:50:53,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 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 02:50:53,148 INFO L186 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2022-01-19 02:50:53,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2022-01-19 02:50:53,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 02:50:53,157 INFO L242 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2022-01-19 02:50:53,159 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2022-01-19 02:50:53,161 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2022-01-19 02:50:53,161 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2022-01-19 02:50:53,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 02:50:53,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:53,161 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] [2022-01-19 02:50:53,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 02:50:53,162 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash 983157472, now seen corresponding path program 1 times [2022-01-19 02:50:53,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:53,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776699436] [2022-01-19 02:50:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:53,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:53,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:53,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776699436] [2022-01-19 02:50:53,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776699436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:50:53,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:50:53,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-19 02:50:53,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833357233] [2022-01-19 02:50:53,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:53,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 02:50:53,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 02:50:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-19 02:50:53,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2022-01-19 02:50:53,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 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 02:50:53,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:53,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2022-01-19 02:50:53,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:53,429 INFO L129 PetriNetUnfolder]: 8/184 cut-off events. [2022-01-19 02:50:53,429 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-01-19 02:50:53,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 184 events. 8/184 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 248. Up to 14 conditions per place. [2022-01-19 02:50:53,431 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 21 selfloop transitions, 10 changer transitions 8/113 dead transitions. [2022-01-19 02:50:53,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 337 flow [2022-01-19 02:50:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 02:50:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 02:50:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2022-01-19 02:50:53,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7883141762452107 [2022-01-19 02:50:53,433 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2022-01-19 02:50:53,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2022-01-19 02:50:53,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:53,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2022-01-19 02:50:53,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 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 02:50:53,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 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 02:50:53,436 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 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 02:50:53,437 INFO L186 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 823 transitions. [2022-01-19 02:50:53,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 337 flow [2022-01-19 02:50:53,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 02:50:53,439 INFO L242 Difference]: Finished difference. Result has 110 places, 99 transitions, 244 flow [2022-01-19 02:50:53,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2022-01-19 02:50:53,440 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-01-19 02:50:53,440 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 244 flow [2022-01-19 02:50:53,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 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 02:50:53,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:53,441 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] [2022-01-19 02:50:53,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 02:50:53,442 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1344338713, now seen corresponding path program 1 times [2022-01-19 02:50:53,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:53,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306502222] [2022-01-19 02:50:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:53,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:53,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:53,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306502222] [2022-01-19 02:50:53,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306502222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:50:53,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117398572] [2022-01-19 02:50:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:53,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:50:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:50:53,660 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 02:50:53,678 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 02:50:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-19 02:50:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:50:54,218 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 15 treesize of output 7 [2022-01-19 02:50:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:54,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:50:54,333 INFO L353 Elim1Store]: treesize reduction 14, result has 26.3 percent of original size [2022-01-19 02:50:54,334 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 27 treesize of output 13 [2022-01-19 02:50:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:54,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117398572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:50:54,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:50:54,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 15 [2022-01-19 02:50:54,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637177439] [2022-01-19 02:50:54,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:50:54,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 02:50:54,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:54,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 02:50:54,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-19 02:50:54,442 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2022-01-19 02:50:54,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 244 flow. Second operand has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 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 02:50:54,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:54,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2022-01-19 02:50:54,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:54,659 INFO L129 PetriNetUnfolder]: 28/243 cut-off events. [2022-01-19 02:50:54,659 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-01-19 02:50:54,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 243 events. 28/243 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 701 event pairs, 0 based on Foata normal form. 1/229 useless extension candidates. Maximal degree in co-relation 405. Up to 27 conditions per place. [2022-01-19 02:50:54,662 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 45 selfloop transitions, 15 changer transitions 9/126 dead transitions. [2022-01-19 02:50:54,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 126 transitions, 462 flow [2022-01-19 02:50:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 02:50:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 02:50:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1192 transitions. [2022-01-19 02:50:54,666 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6044624746450304 [2022-01-19 02:50:54,666 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1192 transitions. [2022-01-19 02:50:54,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1192 transitions. [2022-01-19 02:50:54,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:54,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1192 transitions. [2022-01-19 02:50:54,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.11764705882354) internal successors, (1192), 17 states have internal predecessors, (1192), 0 states have call successors, (0), 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 02:50:54,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 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 02:50:54,672 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 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 02:50:54,672 INFO L186 Difference]: Start difference. First operand has 110 places, 99 transitions, 244 flow. Second operand 17 states and 1192 transitions. [2022-01-19 02:50:54,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 126 transitions, 462 flow [2022-01-19 02:50:54,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 449 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-01-19 02:50:54,677 INFO L242 Difference]: Finished difference. Result has 124 places, 102 transitions, 290 flow [2022-01-19 02:50:54,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=290, PETRI_PLACES=124, PETRI_TRANSITIONS=102} [2022-01-19 02:50:54,678 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 21 predicate places. [2022-01-19 02:50:54,678 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 102 transitions, 290 flow [2022-01-19 02:50:54,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 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 02:50:54,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:54,679 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] [2022-01-19 02:50:54,696 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 02:50:54,879 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 02:50:54,880 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1208957137, now seen corresponding path program 2 times [2022-01-19 02:50:54,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:54,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304370530] [2022-01-19 02:50:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:54,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:55,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:55,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304370530] [2022-01-19 02:50:55,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304370530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:50:55,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367299176] [2022-01-19 02:50:55,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:50:55,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:50:55,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:50:55,126 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 02:50:55,127 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 02:50:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:50:55,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:50:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 02:50:55,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:50:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:50:55,690 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 02:50:55,779 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 15 treesize of output 7 [2022-01-19 02:50:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:55,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:50:55,867 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_89 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_89) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-01-19 02:50:55,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:50:55,895 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 02:50:55,898 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 13 treesize of output 7 [2022-01-19 02:50:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:56,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367299176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:50:56,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:50:56,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 30 [2022-01-19 02:50:56,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152455618] [2022-01-19 02:50:56,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:50:56,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-19 02:50:56,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-19 02:50:56,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2022-01-19 02:50:56,218 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-01-19 02:50:56,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 102 transitions, 290 flow. Second operand has 30 states, 30 states have (on average 63.93333333333333) internal successors, (1918), 30 states have internal predecessors, (1918), 0 states have call successors, (0), 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 02:50:56,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:56,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-01-19 02:50:56,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:56,565 INFO L129 PetriNetUnfolder]: 56/355 cut-off events. [2022-01-19 02:50:56,565 INFO L130 PetriNetUnfolder]: For 334/338 co-relation queries the response was YES. [2022-01-19 02:50:56,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 355 events. 56/355 cut-off events. For 334/338 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1521 event pairs, 0 based on Foata normal form. 5/339 useless extension candidates. Maximal degree in co-relation 690. Up to 74 conditions per place. [2022-01-19 02:50:56,567 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 46 selfloop transitions, 25 changer transitions 9/134 dead transitions. [2022-01-19 02:50:56,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 134 transitions, 583 flow [2022-01-19 02:50:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 02:50:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 02:50:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1235 transitions. [2022-01-19 02:50:56,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2022-01-19 02:50:56,569 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1235 transitions. [2022-01-19 02:50:56,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1235 transitions. [2022-01-19 02:50:56,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:56,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1235 transitions. [2022-01-19 02:50:56,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 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 02:50:56,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 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 02:50:56,574 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 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 02:50:56,575 INFO L186 Difference]: Start difference. First operand has 124 places, 102 transitions, 290 flow. Second operand 19 states and 1235 transitions. [2022-01-19 02:50:56,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 134 transitions, 583 flow [2022-01-19 02:50:56,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 134 transitions, 530 flow, removed 5 selfloop flow, removed 15 redundant places. [2022-01-19 02:50:56,578 INFO L242 Difference]: Finished difference. Result has 130 places, 115 transitions, 415 flow [2022-01-19 02:50:56,578 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=415, PETRI_PLACES=130, PETRI_TRANSITIONS=115} [2022-01-19 02:50:56,578 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 27 predicate places. [2022-01-19 02:50:56,578 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 115 transitions, 415 flow [2022-01-19 02:50:56,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.93333333333333) internal successors, (1918), 30 states have internal predecessors, (1918), 0 states have call successors, (0), 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 02:50:56,579 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:56,579 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] [2022-01-19 02:50:56,613 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 02:50:56,799 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 02:50:56,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:56,800 INFO L85 PathProgramCache]: Analyzing trace with hash 664977125, now seen corresponding path program 3 times [2022-01-19 02:50:56,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487202912] [2022-01-19 02:50:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:56,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:57,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487202912] [2022-01-19 02:50:57,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487202912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:50:57,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876721864] [2022-01-19 02:50:57,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:50:57,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:50:57,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:50:57,003 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 02:50:57,004 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 02:50:57,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 02:50:57,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:50:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 02:50:57,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:50:57,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:50:57,532 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 02:50:57,577 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 15 treesize of output 7 [2022-01-19 02:50:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:57,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:50:57,667 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_114) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-01-19 02:50:57,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:50:57,685 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 02:50:57,688 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 13 treesize of output 7 [2022-01-19 02:50:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:50:58,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876721864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:50:58,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:50:58,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 30 [2022-01-19 02:50:58,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360915107] [2022-01-19 02:50:58,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:50:58,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-19 02:50:58,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:58,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-19 02:50:58,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2022-01-19 02:50:58,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-01-19 02:50:58,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 115 transitions, 415 flow. Second operand has 30 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 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 02:50:58,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:58,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-01-19 02:50:58,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:58,358 INFO L129 PetriNetUnfolder]: 72/442 cut-off events. [2022-01-19 02:50:58,358 INFO L130 PetriNetUnfolder]: For 517/531 co-relation queries the response was YES. [2022-01-19 02:50:58,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 442 events. 72/442 cut-off events. For 517/531 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2193 event pairs, 5 based on Foata normal form. 12/425 useless extension candidates. Maximal degree in co-relation 1002. Up to 106 conditions per place. [2022-01-19 02:50:58,361 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 52 selfloop transitions, 27 changer transitions 8/141 dead transitions. [2022-01-19 02:50:58,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 141 transitions, 745 flow [2022-01-19 02:50:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 02:50:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 02:50:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1232 transitions. [2022-01-19 02:50:58,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558983666061706 [2022-01-19 02:50:58,364 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1232 transitions. [2022-01-19 02:50:58,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1232 transitions. [2022-01-19 02:50:58,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:58,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1232 transitions. [2022-01-19 02:50:58,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.84210526315789) internal successors, (1232), 19 states have internal predecessors, (1232), 0 states have call successors, (0), 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 02:50:58,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 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 02:50:58,369 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 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 02:50:58,369 INFO L186 Difference]: Start difference. First operand has 130 places, 115 transitions, 415 flow. Second operand 19 states and 1232 transitions. [2022-01-19 02:50:58,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 141 transitions, 745 flow [2022-01-19 02:50:58,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 141 transitions, 703 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-01-19 02:50:58,375 INFO L242 Difference]: Finished difference. Result has 137 places, 123 transitions, 538 flow [2022-01-19 02:50:58,375 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=538, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2022-01-19 02:50:58,376 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2022-01-19 02:50:58,376 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 538 flow [2022-01-19 02:50:58,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 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 02:50:58,377 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:58,377 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] [2022-01-19 02:50:58,396 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 02:50:58,583 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 02:50:58,584 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:58,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2102566367, now seen corresponding path program 4 times [2022-01-19 02:50:58,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:58,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386007114] [2022-01-19 02:50:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:58,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:58,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:58,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386007114] [2022-01-19 02:50:58,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386007114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:50:58,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773002921] [2022-01-19 02:50:58,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:50:58,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:50:58,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:50:58,686 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 02:50:58,707 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 02:50:58,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:50:58,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:50:58,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:50:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:50:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:59,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:50:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:59,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773002921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:50:59,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:50:59,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-19 02:50:59,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601357438] [2022-01-19 02:50:59,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:50:59,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 02:50:59,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:59,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 02:50:59,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-01-19 02:50:59,476 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 02:50:59,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 538 flow. Second operand has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 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 02:50:59,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:59,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 02:50:59,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:59,753 INFO L129 PetriNetUnfolder]: 67/613 cut-off events. [2022-01-19 02:50:59,753 INFO L130 PetriNetUnfolder]: For 1013/1039 co-relation queries the response was YES. [2022-01-19 02:50:59,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 613 events. 67/613 cut-off events. For 1013/1039 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3831 event pairs, 2 based on Foata normal form. 41/608 useless extension candidates. Maximal degree in co-relation 1304. Up to 81 conditions per place. [2022-01-19 02:50:59,756 INFO L132 encePairwiseOnDemand]: 103/116 looper letters, 34 selfloop transitions, 21 changer transitions 21/154 dead transitions. [2022-01-19 02:50:59,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 154 transitions, 894 flow [2022-01-19 02:50:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-19 02:50:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-01-19 02:50:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1341 transitions. [2022-01-19 02:50:59,758 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7706896551724138 [2022-01-19 02:50:59,759 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1341 transitions. [2022-01-19 02:50:59,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1341 transitions. [2022-01-19 02:50:59,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:59,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1341 transitions. [2022-01-19 02:50:59,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.4) internal successors, (1341), 15 states have internal predecessors, (1341), 0 states have call successors, (0), 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 02:50:59,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 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 02:50:59,763 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 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 02:50:59,764 INFO L186 Difference]: Start difference. First operand has 137 places, 123 transitions, 538 flow. Second operand 15 states and 1341 transitions. [2022-01-19 02:50:59,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 154 transitions, 894 flow [2022-01-19 02:50:59,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 154 transitions, 852 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-01-19 02:50:59,767 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 605 flow [2022-01-19 02:50:59,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=605, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2022-01-19 02:50:59,768 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 38 predicate places. [2022-01-19 02:50:59,768 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 605 flow [2022-01-19 02:50:59,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 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 02:50:59,769 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:59,769 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] [2022-01-19 02:50:59,788 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 02:50:59,988 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 02:50:59,988 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 735680284, now seen corresponding path program 5 times [2022-01-19 02:50:59,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:59,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292993262] [2022-01-19 02:50:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:59,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:00,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:00,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292993262] [2022-01-19 02:51:00,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292993262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:00,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669703378] [2022-01-19 02:51:00,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:51:00,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:00,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:00,174 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 02:51:00,175 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 02:51:00,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:51:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-19 02:51:00,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:00,299 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 02:51:00,437 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:51:00,439 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 02:51:00,694 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 02:51:00,728 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 15 treesize of output 7 [2022-01-19 02:51:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 02:51:00,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:00,815 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_168 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_168) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-01-19 02:51:00,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:51:00,826 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 02:51:00,829 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 13 treesize of output 7 [2022-01-19 02:51:01,313 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 02:51:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 02:51:01,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669703378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:01,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:01,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 32 [2022-01-19 02:51:01,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588993112] [2022-01-19 02:51:01,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:01,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 02:51:01,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 02:51:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=803, Unknown=1, NotChecked=58, Total=992 [2022-01-19 02:51:01,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 116 [2022-01-19 02:51:01,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 605 flow. Second operand has 32 states, 32 states have (on average 60.3125) internal successors, (1930), 32 states have internal predecessors, (1930), 0 states have call successors, (0), 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 02:51:01,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:01,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 116 [2022-01-19 02:51:01,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:01,806 INFO L129 PetriNetUnfolder]: 112/671 cut-off events. [2022-01-19 02:51:01,807 INFO L130 PetriNetUnfolder]: For 1707/1724 co-relation queries the response was YES. [2022-01-19 02:51:01,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 671 events. 112/671 cut-off events. For 1707/1724 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4246 event pairs, 6 based on Foata normal form. 15/637 useless extension candidates. Maximal degree in co-relation 1818. Up to 153 conditions per place. [2022-01-19 02:51:01,813 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 65 selfloop transitions, 42 changer transitions 10/172 dead transitions. [2022-01-19 02:51:01,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 172 transitions, 1206 flow [2022-01-19 02:51:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 02:51:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 02:51:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1228 transitions. [2022-01-19 02:51:01,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5293103448275862 [2022-01-19 02:51:01,816 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1228 transitions. [2022-01-19 02:51:01,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1228 transitions. [2022-01-19 02:51:01,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:01,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1228 transitions. [2022-01-19 02:51:01,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 61.4) internal successors, (1228), 20 states have internal predecessors, (1228), 0 states have call successors, (0), 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 02:51:01,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 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 02:51:01,823 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 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 02:51:01,823 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 605 flow. Second operand 20 states and 1228 transitions. [2022-01-19 02:51:01,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 172 transitions, 1206 flow [2022-01-19 02:51:01,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 172 transitions, 1143 flow, removed 26 selfloop flow, removed 8 redundant places. [2022-01-19 02:51:01,831 INFO L242 Difference]: Finished difference. Result has 155 places, 149 transitions, 981 flow [2022-01-19 02:51:01,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=981, PETRI_PLACES=155, PETRI_TRANSITIONS=149} [2022-01-19 02:51:01,832 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 52 predicate places. [2022-01-19 02:51:01,832 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 149 transitions, 981 flow [2022-01-19 02:51:01,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 60.3125) internal successors, (1930), 32 states have internal predecessors, (1930), 0 states have call successors, (0), 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 02:51:01,833 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:01,833 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] [2022-01-19 02:51:01,874 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 02:51:02,047 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 02:51:02,047 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash -179513234, now seen corresponding path program 6 times [2022-01-19 02:51:02,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713754036] [2022-01-19 02:51:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:02,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:02,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:02,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713754036] [2022-01-19 02:51:02,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713754036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:02,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441416098] [2022-01-19 02:51:02,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:51:02,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:02,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:02,479 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 02:51:02,479 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 02:51:02,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 02:51:02,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-19 02:51:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:51:03,152 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 02:51:03,207 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 15 treesize of output 7 [2022-01-19 02:51:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:03,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:03,283 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_197 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_197) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-01-19 02:51:03,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:51:03,308 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 02:51:03,312 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 13 treesize of output 7 [2022-01-19 02:51:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2022-01-19 02:51:03,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441416098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:03,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:03,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 14] total 40 [2022-01-19 02:51:03,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761667925] [2022-01-19 02:51:03,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:03,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-19 02:51:03,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-19 02:51:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1299, Unknown=1, NotChecked=74, Total=1560 [2022-01-19 02:51:03,643 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 116 [2022-01-19 02:51:03,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 149 transitions, 981 flow. Second operand has 40 states, 40 states have (on average 53.325) internal successors, (2133), 40 states have internal predecessors, (2133), 0 states have call successors, (0), 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 02:51:03,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:03,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 116 [2022-01-19 02:51:03,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:04,346 INFO L129 PetriNetUnfolder]: 117/725 cut-off events. [2022-01-19 02:51:04,346 INFO L130 PetriNetUnfolder]: For 2209/2230 co-relation queries the response was YES. [2022-01-19 02:51:04,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 725 events. 117/725 cut-off events. For 2209/2230 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4759 event pairs, 2 based on Foata normal form. 12/682 useless extension candidates. Maximal degree in co-relation 2068. Up to 115 conditions per place. [2022-01-19 02:51:04,351 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 68 selfloop transitions, 50 changer transitions 8/169 dead transitions. [2022-01-19 02:51:04,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 1357 flow [2022-01-19 02:51:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 02:51:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 02:51:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1177 transitions. [2022-01-19 02:51:04,354 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46120689655172414 [2022-01-19 02:51:04,354 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1177 transitions. [2022-01-19 02:51:04,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1177 transitions. [2022-01-19 02:51:04,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:04,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1177 transitions. [2022-01-19 02:51:04,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.5) internal successors, (1177), 22 states have internal predecessors, (1177), 0 states have call successors, (0), 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 02:51:04,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 02:51:04,361 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 02:51:04,361 INFO L186 Difference]: Start difference. First operand has 155 places, 149 transitions, 981 flow. Second operand 22 states and 1177 transitions. [2022-01-19 02:51:04,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 1357 flow [2022-01-19 02:51:04,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 169 transitions, 1283 flow, removed 14 selfloop flow, removed 15 redundant places. [2022-01-19 02:51:04,368 INFO L242 Difference]: Finished difference. Result has 163 places, 151 transitions, 1070 flow [2022-01-19 02:51:04,368 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1070, PETRI_PLACES=163, PETRI_TRANSITIONS=151} [2022-01-19 02:51:04,369 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 60 predicate places. [2022-01-19 02:51:04,369 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 151 transitions, 1070 flow [2022-01-19 02:51:04,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 53.325) internal successors, (2133), 40 states have internal predecessors, (2133), 0 states have call successors, (0), 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 02:51:04,370 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:04,370 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] [2022-01-19 02:51:04,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 02:51:04,583 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 02:51:04,583 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:04,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 922780630, now seen corresponding path program 7 times [2022-01-19 02:51:04,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:04,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433475706] [2022-01-19 02:51:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:04,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:04,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433475706] [2022-01-19 02:51:04,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433475706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001293649] [2022-01-19 02:51:04,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:51:04,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:04,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:04,620 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 02:51:04,621 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 02:51:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:04,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 02:51:04,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 02:51:04,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 02:51:04,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001293649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:51:04,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 02:51:04,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-01-19 02:51:04,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011139085] [2022-01-19 02:51:04,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:51:04,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 02:51:04,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 02:51:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:51:04,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 02:51:04,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 151 transitions, 1070 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 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 02:51:04,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:04,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 02:51:04,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:04,873 INFO L129 PetriNetUnfolder]: 105/764 cut-off events. [2022-01-19 02:51:04,874 INFO L130 PetriNetUnfolder]: For 2908/2924 co-relation queries the response was YES. [2022-01-19 02:51:04,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 764 events. 105/764 cut-off events. For 2908/2924 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5252 event pairs, 6 based on Foata normal form. 23/734 useless extension candidates. Maximal degree in co-relation 2056. Up to 133 conditions per place. [2022-01-19 02:51:04,878 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 35 selfloop transitions, 21 changer transitions 2/162 dead transitions. [2022-01-19 02:51:04,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 162 transitions, 1280 flow [2022-01-19 02:51:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 02:51:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 02:51:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2022-01-19 02:51:04,879 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.915948275862069 [2022-01-19 02:51:04,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2022-01-19 02:51:04,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2022-01-19 02:51:04,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:04,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2022-01-19 02:51:04,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 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 02:51:04,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 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 02:51:04,881 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 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 02:51:04,881 INFO L186 Difference]: Start difference. First operand has 163 places, 151 transitions, 1070 flow. Second operand 4 states and 425 transitions. [2022-01-19 02:51:04,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 162 transitions, 1280 flow [2022-01-19 02:51:04,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 162 transitions, 1186 flow, removed 13 selfloop flow, removed 19 redundant places. [2022-01-19 02:51:04,888 INFO L242 Difference]: Finished difference. Result has 147 places, 154 transitions, 1116 flow [2022-01-19 02:51:04,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=147, PETRI_TRANSITIONS=154} [2022-01-19 02:51:04,888 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 44 predicate places. [2022-01-19 02:51:04,888 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 154 transitions, 1116 flow [2022-01-19 02:51:04,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 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 02:51:04,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:04,889 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:51:04,919 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 02:51:05,119 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 02:51:05,122 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:05,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash -565034456, now seen corresponding path program 8 times [2022-01-19 02:51:05,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:05,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817964428] [2022-01-19 02:51:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:05,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:05,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:05,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817964428] [2022-01-19 02:51:05,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817964428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:05,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889942374] [2022-01-19 02:51:05,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:51:05,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:05,337 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 02:51:05,343 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 02:51:05,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:51:05,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:05,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-19 02:51:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:05,694 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 02:51:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:05,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:05,786 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 02:51:05,786 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 28 treesize of output 13 [2022-01-19 02:51:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:05,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889942374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:05,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:05,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 22 [2022-01-19 02:51:05,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138129862] [2022-01-19 02:51:05,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:05,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:51:05,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:51:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:51:05,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2022-01-19 02:51:05,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 154 transitions, 1116 flow. Second operand has 22 states, 22 states have (on average 69.95454545454545) internal successors, (1539), 22 states have internal predecessors, (1539), 0 states have call successors, (0), 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 02:51:05,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:05,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2022-01-19 02:51:05,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:06,623 INFO L129 PetriNetUnfolder]: 153/985 cut-off events. [2022-01-19 02:51:06,623 INFO L130 PetriNetUnfolder]: For 4329/4352 co-relation queries the response was YES. [2022-01-19 02:51:06,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2990 conditions, 985 events. 153/985 cut-off events. For 4329/4352 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7335 event pairs, 0 based on Foata normal form. 15/928 useless extension candidates. Maximal degree in co-relation 2962. Up to 177 conditions per place. [2022-01-19 02:51:06,629 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 88 selfloop transitions, 62 changer transitions 45/257 dead transitions. [2022-01-19 02:51:06,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 257 transitions, 2205 flow [2022-01-19 02:51:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 02:51:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 02:51:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2602 transitions. [2022-01-19 02:51:06,632 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6062441752096924 [2022-01-19 02:51:06,632 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2602 transitions. [2022-01-19 02:51:06,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2602 transitions. [2022-01-19 02:51:06,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:06,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2602 transitions. [2022-01-19 02:51:06,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 70.32432432432432) internal successors, (2602), 37 states have internal predecessors, (2602), 0 states have call successors, (0), 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 02:51:06,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 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 02:51:06,649 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 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 02:51:06,649 INFO L186 Difference]: Start difference. First operand has 147 places, 154 transitions, 1116 flow. Second operand 37 states and 2602 transitions. [2022-01-19 02:51:06,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 257 transitions, 2205 flow [2022-01-19 02:51:06,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 257 transitions, 2193 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-01-19 02:51:06,661 INFO L242 Difference]: Finished difference. Result has 198 places, 164 transitions, 1460 flow [2022-01-19 02:51:06,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1460, PETRI_PLACES=198, PETRI_TRANSITIONS=164} [2022-01-19 02:51:06,663 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 95 predicate places. [2022-01-19 02:51:06,663 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 164 transitions, 1460 flow [2022-01-19 02:51:06,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 69.95454545454545) internal successors, (1539), 22 states have internal predecessors, (1539), 0 states have call successors, (0), 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 02:51:06,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:06,664 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:51:06,684 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 02:51:06,879 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 02:51:06,879 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:06,879 INFO L85 PathProgramCache]: Analyzing trace with hash 714619008, now seen corresponding path program 9 times [2022-01-19 02:51:06,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:06,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866553145] [2022-01-19 02:51:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:06,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:07,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866553145] [2022-01-19 02:51:07,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866553145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143519963] [2022-01-19 02:51:07,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:51:07,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:07,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:07,114 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 02:51:07,115 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 02:51:07,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:51:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:07,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-19 02:51:07,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:07,363 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 02:51:07,544 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:51:07,544 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 02:51:07,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 02:51:07,967 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 02:51:08,129 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 21 treesize of output 23 [2022-01-19 02:51:10,424 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-19 02:51:10,425 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 27 treesize of output 10 [2022-01-19 02:51:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 02:51:10,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:11,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:51:11,535 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 1 case distinctions, treesize of input 61 treesize of output 49 [2022-01-19 02:51:11,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:51:11,542 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 192 treesize of output 183 [2022-01-19 02:51:11,546 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 136 treesize of output 108 [2022-01-19 02:51:11,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:51:11,555 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 135 treesize of output 132 [2022-01-19 02:51:12,693 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 02:51:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 02:51:12,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143519963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:12,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:12,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 57 [2022-01-19 02:51:12,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045811143] [2022-01-19 02:51:12,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:12,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 02:51:12,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 02:51:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2867, Unknown=15, NotChecked=0, Total=3192 [2022-01-19 02:51:12,757 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 116 [2022-01-19 02:51:12,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 164 transitions, 1460 flow. Second operand has 57 states, 57 states have (on average 48.771929824561404) internal successors, (2780), 57 states have internal predecessors, (2780), 0 states have call successors, (0), 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 02:51:12,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:12,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 116 [2022-01-19 02:51:12,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:29,578 INFO L129 PetriNetUnfolder]: 468/2694 cut-off events. [2022-01-19 02:51:29,578 INFO L130 PetriNetUnfolder]: For 15770/15831 co-relation queries the response was YES. [2022-01-19 02:51:29,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8691 conditions, 2694 events. 468/2694 cut-off events. For 15770/15831 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 27070 event pairs, 15 based on Foata normal form. 33/2499 useless extension candidates. Maximal degree in co-relation 8646. Up to 510 conditions per place. [2022-01-19 02:51:29,600 INFO L132 encePairwiseOnDemand]: 83/116 looper letters, 157 selfloop transitions, 178 changer transitions 21/396 dead transitions. [2022-01-19 02:51:29,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 396 transitions, 4897 flow [2022-01-19 02:51:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-19 02:51:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-01-19 02:51:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2796 transitions. [2022-01-19 02:51:29,603 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4304187192118227 [2022-01-19 02:51:29,603 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2796 transitions. [2022-01-19 02:51:29,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2796 transitions. [2022-01-19 02:51:29,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:29,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2796 transitions. [2022-01-19 02:51:29,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 49.92857142857143) internal successors, (2796), 56 states have internal predecessors, (2796), 0 states have call successors, (0), 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 02:51:29,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 116.0) internal successors, (6612), 57 states have internal predecessors, (6612), 0 states have call successors, (0), 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 02:51:29,613 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 116.0) internal successors, (6612), 57 states have internal predecessors, (6612), 0 states have call successors, (0), 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 02:51:29,613 INFO L186 Difference]: Start difference. First operand has 198 places, 164 transitions, 1460 flow. Second operand 56 states and 2796 transitions. [2022-01-19 02:51:29,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 396 transitions, 4897 flow [2022-01-19 02:51:29,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 396 transitions, 4198 flow, removed 190 selfloop flow, removed 27 redundant places. [2022-01-19 02:51:29,639 INFO L242 Difference]: Finished difference. Result has 243 places, 310 transitions, 3749 flow [2022-01-19 02:51:29,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=3749, PETRI_PLACES=243, PETRI_TRANSITIONS=310} [2022-01-19 02:51:29,640 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 140 predicate places. [2022-01-19 02:51:29,640 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 310 transitions, 3749 flow [2022-01-19 02:51:29,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 48.771929824561404) internal successors, (2780), 57 states have internal predecessors, (2780), 0 states have call successors, (0), 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 02:51:29,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:29,641 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:51:29,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-19 02:51:29,857 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 02:51:29,858 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:29,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2090811098, now seen corresponding path program 10 times [2022-01-19 02:51:29,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:29,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961547179] [2022-01-19 02:51:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:29,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:30,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:30,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961547179] [2022-01-19 02:51:30,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961547179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:30,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835573788] [2022-01-19 02:51:30,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:51:30,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:30,098 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 02:51:30,115 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 02:51:30,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:51:30,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-19 02:51:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:30,203 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 02:51:30,309 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:51:30,309 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 02:51:30,658 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 02:51:30,771 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 02:51:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 02:51:30,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:30,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_316) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-01-19 02:51:30,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:51:30,899 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 47 treesize of output 47 [2022-01-19 02:51:30,901 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 14 treesize of output 7 [2022-01-19 02:51:31,373 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 02:51:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:31,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835573788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:31,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:31,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 39 [2022-01-19 02:51:31,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629656163] [2022-01-19 02:51:31,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:31,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 02:51:31,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 02:51:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1247, Unknown=1, NotChecked=72, Total=1482 [2022-01-19 02:51:31,413 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 116 [2022-01-19 02:51:31,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 310 transitions, 3749 flow. Second operand has 39 states, 39 states have (on average 55.15384615384615) internal successors, (2151), 39 states have internal predecessors, (2151), 0 states have call successors, (0), 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 02:51:31,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:31,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 116 [2022-01-19 02:51:31,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:32,609 INFO L129 PetriNetUnfolder]: 513/2915 cut-off events. [2022-01-19 02:51:32,609 INFO L130 PetriNetUnfolder]: For 24917/25070 co-relation queries the response was YES. [2022-01-19 02:51:32,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11646 conditions, 2915 events. 513/2915 cut-off events. For 24917/25070 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 30028 event pairs, 2 based on Foata normal form. 67/2729 useless extension candidates. Maximal degree in co-relation 11586. Up to 580 conditions per place. [2022-01-19 02:51:32,632 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 161 selfloop transitions, 184 changer transitions 33/423 dead transitions. [2022-01-19 02:51:32,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 423 transitions, 6132 flow [2022-01-19 02:51:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-19 02:51:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-01-19 02:51:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1524 transitions. [2022-01-19 02:51:32,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48659003831417624 [2022-01-19 02:51:32,634 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1524 transitions. [2022-01-19 02:51:32,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1524 transitions. [2022-01-19 02:51:32,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:32,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1524 transitions. [2022-01-19 02:51:32,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.44444444444444) internal successors, (1524), 27 states have internal predecessors, (1524), 0 states have call successors, (0), 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 02:51:32,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 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 02:51:32,639 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 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 02:51:32,639 INFO L186 Difference]: Start difference. First operand has 243 places, 310 transitions, 3749 flow. Second operand 27 states and 1524 transitions. [2022-01-19 02:51:32,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 423 transitions, 6132 flow [2022-01-19 02:51:32,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 423 transitions, 5584 flow, removed 246 selfloop flow, removed 22 redundant places. [2022-01-19 02:51:32,705 INFO L242 Difference]: Finished difference. Result has 245 places, 336 transitions, 4259 flow [2022-01-19 02:51:32,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4259, PETRI_PLACES=245, PETRI_TRANSITIONS=336} [2022-01-19 02:51:32,705 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 142 predicate places. [2022-01-19 02:51:32,705 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 336 transitions, 4259 flow [2022-01-19 02:51:32,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 55.15384615384615) internal successors, (2151), 39 states have internal predecessors, (2151), 0 states have call successors, (0), 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 02:51:32,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:32,706 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-01-19 02:51:32,724 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 02:51:32,919 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 02:51:32,919 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:32,920 INFO L85 PathProgramCache]: Analyzing trace with hash 786721058, now seen corresponding path program 11 times [2022-01-19 02:51:32,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:32,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696394043] [2022-01-19 02:51:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:32,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:32,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696394043] [2022-01-19 02:51:32,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696394043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:32,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194420710] [2022-01-19 02:51:32,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:51:32,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:32,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:32,964 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 02:51:32,987 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 02:51:33,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:51:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:33,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 02:51:33,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:33,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:33,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194420710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:33,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:33,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-19 02:51:33,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580826093] [2022-01-19 02:51:33,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:33,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:51:33,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:51:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:51:33,336 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 02:51:33,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 336 transitions, 4259 flow. Second operand has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 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 02:51:33,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:33,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 02:51:33,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:33,837 INFO L129 PetriNetUnfolder]: 635/3879 cut-off events. [2022-01-19 02:51:33,837 INFO L130 PetriNetUnfolder]: For 38267/38467 co-relation queries the response was YES. [2022-01-19 02:51:33,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15375 conditions, 3879 events. 635/3879 cut-off events. For 38267/38467 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 42941 event pairs, 55 based on Foata normal form. 102/3654 useless extension candidates. Maximal degree in co-relation 15314. Up to 778 conditions per place. [2022-01-19 02:51:33,875 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 108 selfloop transitions, 165 changer transitions 14/418 dead transitions. [2022-01-19 02:51:33,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 418 transitions, 6180 flow [2022-01-19 02:51:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 02:51:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 02:51:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2022-01-19 02:51:33,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9172413793103448 [2022-01-19 02:51:33,880 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2022-01-19 02:51:33,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2022-01-19 02:51:33,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:33,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2022-01-19 02:51:33,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 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 02:51:33,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 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 02:51:33,885 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 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 02:51:33,885 INFO L186 Difference]: Start difference. First operand has 245 places, 336 transitions, 4259 flow. Second operand 5 states and 532 transitions. [2022-01-19 02:51:33,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 418 transitions, 6180 flow [2022-01-19 02:51:33,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 418 transitions, 5574 flow, removed 81 selfloop flow, removed 24 redundant places. [2022-01-19 02:51:33,981 INFO L242 Difference]: Finished difference. Result has 226 places, 391 transitions, 5388 flow [2022-01-19 02:51:33,982 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3649, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5388, PETRI_PLACES=226, PETRI_TRANSITIONS=391} [2022-01-19 02:51:33,982 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 123 predicate places. [2022-01-19 02:51:33,982 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 391 transitions, 5388 flow [2022-01-19 02:51:33,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 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 02:51:33,982 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:33,982 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-01-19 02:51:34,005 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 02:51:34,195 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 02:51:34,196 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1903099010, now seen corresponding path program 12 times [2022-01-19 02:51:34,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:34,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211128258] [2022-01-19 02:51:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:34,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-19 02:51:34,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211128258] [2022-01-19 02:51:34,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211128258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928174767] [2022-01-19 02:51:34,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:51:34,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:34,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:34,348 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 02:51:34,349 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 02:51:34,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:51:34,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 02:51:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:35,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:35,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928174767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:35,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:35,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-01-19 02:51:35,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104891545] [2022-01-19 02:51:35,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:35,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 02:51:35,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 02:51:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 02:51:35,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 02:51:35,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 391 transitions, 5388 flow. Second operand has 35 states, 35 states have (on average 88.4) internal successors, (3094), 35 states have internal predecessors, (3094), 0 states have call successors, (0), 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 02:51:35,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:35,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 02:51:35,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:36,554 INFO L129 PetriNetUnfolder]: 538/3866 cut-off events. [2022-01-19 02:51:36,554 INFO L130 PetriNetUnfolder]: For 41507/41697 co-relation queries the response was YES. [2022-01-19 02:51:36,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15855 conditions, 3866 events. 538/3866 cut-off events. For 41507/41697 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 44109 event pairs, 68 based on Foata normal form. 133/3671 useless extension candidates. Maximal degree in co-relation 15794. Up to 682 conditions per place. [2022-01-19 02:51:36,578 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 142 selfloop transitions, 48 changer transitions 139/418 dead transitions. [2022-01-19 02:51:36,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 418 transitions, 6607 flow [2022-01-19 02:51:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 02:51:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 02:51:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1959 transitions. [2022-01-19 02:51:36,580 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7676332288401254 [2022-01-19 02:51:36,580 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1959 transitions. [2022-01-19 02:51:36,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1959 transitions. [2022-01-19 02:51:36,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:36,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1959 transitions. [2022-01-19 02:51:36,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 89.04545454545455) internal successors, (1959), 22 states have internal predecessors, (1959), 0 states have call successors, (0), 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 02:51:36,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 02:51:36,584 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 02:51:36,584 INFO L186 Difference]: Start difference. First operand has 226 places, 391 transitions, 5388 flow. Second operand 22 states and 1959 transitions. [2022-01-19 02:51:36,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 418 transitions, 6607 flow [2022-01-19 02:51:36,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 418 transitions, 6419 flow, removed 56 selfloop flow, removed 3 redundant places. [2022-01-19 02:51:36,663 INFO L242 Difference]: Finished difference. Result has 246 places, 272 transitions, 3490 flow [2022-01-19 02:51:36,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3490, PETRI_PLACES=246, PETRI_TRANSITIONS=272} [2022-01-19 02:51:36,663 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 143 predicate places. [2022-01-19 02:51:36,664 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 272 transitions, 3490 flow [2022-01-19 02:51:36,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 88.4) internal successors, (3094), 35 states have internal predecessors, (3094), 0 states have call successors, (0), 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 02:51:36,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:36,664 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:51:36,680 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 02:51:36,871 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 02:51:36,871 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash -469047527, now seen corresponding path program 13 times [2022-01-19 02:51:36,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:36,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863256022] [2022-01-19 02:51:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:36,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:37,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:37,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863256022] [2022-01-19 02:51:37,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863256022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:37,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544892200] [2022-01-19 02:51:37,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:51:37,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:37,213 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 02:51:37,214 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 02:51:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:37,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 02:51:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:37,629 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 02:51:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 02:51:37,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:37,745 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 02:51:37,746 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 28 treesize of output 13 [2022-01-19 02:51:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 02:51:37,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544892200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:37,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:37,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 11] total 33 [2022-01-19 02:51:37,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457544438] [2022-01-19 02:51:37,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:37,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 02:51:37,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 02:51:37,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 02:51:37,907 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-01-19 02:51:37,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 272 transitions, 3490 flow. Second operand has 33 states, 33 states have (on average 63.666666666666664) internal successors, (2101), 33 states have internal predecessors, (2101), 0 states have call successors, (0), 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 02:51:37,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:37,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-01-19 02:51:37,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:40,031 INFO L129 PetriNetUnfolder]: 563/3245 cut-off events. [2022-01-19 02:51:40,031 INFO L130 PetriNetUnfolder]: For 33092/33136 co-relation queries the response was YES. [2022-01-19 02:51:40,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13941 conditions, 3245 events. 563/3245 cut-off events. For 33092/33136 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 33993 event pairs, 2 based on Foata normal form. 21/2994 useless extension candidates. Maximal degree in co-relation 13878. Up to 697 conditions per place. [2022-01-19 02:51:40,077 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 191 selfloop transitions, 206 changer transitions 107/554 dead transitions. [2022-01-19 02:51:40,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 554 transitions, 8697 flow [2022-01-19 02:51:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-19 02:51:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-01-19 02:51:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5138 transitions. [2022-01-19 02:51:40,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5536637931034483 [2022-01-19 02:51:40,082 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5138 transitions. [2022-01-19 02:51:40,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5138 transitions. [2022-01-19 02:51:40,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:40,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5138 transitions. [2022-01-19 02:51:40,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 64.225) internal successors, (5138), 80 states have internal predecessors, (5138), 0 states have call successors, (0), 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 02:51:40,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 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 02:51:40,097 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 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 02:51:40,097 INFO L186 Difference]: Start difference. First operand has 246 places, 272 transitions, 3490 flow. Second operand 80 states and 5138 transitions. [2022-01-19 02:51:40,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 554 transitions, 8697 flow [2022-01-19 02:51:40,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 554 transitions, 7715 flow, removed 456 selfloop flow, removed 26 redundant places. [2022-01-19 02:51:40,223 INFO L242 Difference]: Finished difference. Result has 319 places, 322 transitions, 4814 flow [2022-01-19 02:51:40,224 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=4814, PETRI_PLACES=319, PETRI_TRANSITIONS=322} [2022-01-19 02:51:40,224 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 216 predicate places. [2022-01-19 02:51:40,224 INFO L470 AbstractCegarLoop]: Abstraction has has 319 places, 322 transitions, 4814 flow [2022-01-19 02:51:40,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 63.666666666666664) internal successors, (2101), 33 states have internal predecessors, (2101), 0 states have call successors, (0), 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 02:51:40,225 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:40,225 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:51:40,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-19 02:51:40,425 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 02:51:40,426 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash -843056299, now seen corresponding path program 14 times [2022-01-19 02:51:40,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:40,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069835573] [2022-01-19 02:51:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:40,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:40,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069835573] [2022-01-19 02:51:40,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069835573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869162196] [2022-01-19 02:51:40,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:51:40,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:40,812 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 02:51:40,813 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 02:51:40,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:51:40,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-19 02:51:40,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:41,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:51:41,421 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 02:51:41,546 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 02:51:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 02:51:41,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:41,664 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_437) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2022-01-19 02:51:41,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:51:41,680 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 47 treesize of output 47 [2022-01-19 02:51:41,683 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 14 treesize of output 7 [2022-01-19 02:51:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 02:51:42,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869162196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:42,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:42,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 18] total 48 [2022-01-19 02:51:42,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223986182] [2022-01-19 02:51:42,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:42,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-19 02:51:42,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-19 02:51:42,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1979, Unknown=1, NotChecked=90, Total=2256 [2022-01-19 02:51:42,109 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 116 [2022-01-19 02:51:42,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 322 transitions, 4814 flow. Second operand has 48 states, 48 states have (on average 57.770833333333336) internal successors, (2773), 48 states have internal predecessors, (2773), 0 states have call successors, (0), 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 02:51:42,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:42,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 116 [2022-01-19 02:51:42,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:44,098 INFO L129 PetriNetUnfolder]: 698/3766 cut-off events. [2022-01-19 02:51:44,098 INFO L130 PetriNetUnfolder]: For 36302/36495 co-relation queries the response was YES. [2022-01-19 02:51:44,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15871 conditions, 3766 events. 698/3766 cut-off events. For 36302/36495 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 40364 event pairs, 2 based on Foata normal form. 40/3483 useless extension candidates. Maximal degree in co-relation 15781. Up to 859 conditions per place. [2022-01-19 02:51:44,143 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 129 selfloop transitions, 259 changer transitions 37/472 dead transitions. [2022-01-19 02:51:44,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 472 transitions, 7883 flow [2022-01-19 02:51:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 02:51:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 02:51:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2440 transitions. [2022-01-19 02:51:44,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5130361648444071 [2022-01-19 02:51:44,147 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2440 transitions. [2022-01-19 02:51:44,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2440 transitions. [2022-01-19 02:51:44,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:44,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2440 transitions. [2022-01-19 02:51:44,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 59.51219512195122) internal successors, (2440), 41 states have internal predecessors, (2440), 0 states have call successors, (0), 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 02:51:44,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 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 02:51:44,157 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 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 02:51:44,157 INFO L186 Difference]: Start difference. First operand has 319 places, 322 transitions, 4814 flow. Second operand 41 states and 2440 transitions. [2022-01-19 02:51:44,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 472 transitions, 7883 flow [2022-01-19 02:51:44,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 472 transitions, 7266 flow, removed 126 selfloop flow, removed 52 redundant places. [2022-01-19 02:51:44,316 INFO L242 Difference]: Finished difference. Result has 288 places, 373 transitions, 5846 flow [2022-01-19 02:51:44,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4281, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5846, PETRI_PLACES=288, PETRI_TRANSITIONS=373} [2022-01-19 02:51:44,316 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 185 predicate places. [2022-01-19 02:51:44,316 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 373 transitions, 5846 flow [2022-01-19 02:51:44,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 57.770833333333336) internal successors, (2773), 48 states have internal predecessors, (2773), 0 states have call successors, (0), 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 02:51:44,317 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:44,317 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:51:44,336 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 02:51:44,531 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 02:51:44,531 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash 351860543, now seen corresponding path program 15 times [2022-01-19 02:51:44,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:44,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394032934] [2022-01-19 02:51:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:44,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 02:51:44,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394032934] [2022-01-19 02:51:44,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394032934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883008023] [2022-01-19 02:51:44,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:51:44,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:44,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:44,592 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 02:51:44,672 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 02:51:45,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 02:51:45,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-19 02:51:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:46,231 INFO L353 Elim1Store]: treesize reduction 60, result has 4.8 percent of original size [2022-01-19 02:51:46,232 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 41 treesize of output 13 [2022-01-19 02:51:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:46,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:46,558 INFO L353 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2022-01-19 02:51:46,558 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 44 treesize of output 36 [2022-01-19 02:51:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:51:47,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883008023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:47,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:47,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21, 21] total 41 [2022-01-19 02:51:47,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241779973] [2022-01-19 02:51:47,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:47,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-19 02:51:47,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-19 02:51:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-01-19 02:51:47,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2022-01-19 02:51:47,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 373 transitions, 5846 flow. Second operand has 41 states, 41 states have (on average 66.60975609756098) internal successors, (2731), 41 states have internal predecessors, (2731), 0 states have call successors, (0), 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 02:51:47,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:47,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2022-01-19 02:51:47,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:52:04,550 INFO L129 PetriNetUnfolder]: 5563/28524 cut-off events. [2022-01-19 02:52:04,551 INFO L130 PetriNetUnfolder]: For 362309/364311 co-relation queries the response was YES. [2022-01-19 02:52:04,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127379 conditions, 28524 events. 5563/28524 cut-off events. For 362309/364311 co-relation queries the response was YES. Maximal size of possible extension queue 1697. Compared 435527 event pairs, 37 based on Foata normal form. 611/26628 useless extension candidates. Maximal degree in co-relation 127309. Up to 6889 conditions per place. [2022-01-19 02:52:04,809 INFO L132 encePairwiseOnDemand]: 92/116 looper letters, 612 selfloop transitions, 1916 changer transitions 521/3102 dead transitions. [2022-01-19 02:52:04,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 3102 transitions, 62146 flow [2022-01-19 02:52:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-01-19 02:52:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2022-01-19 02:52:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 20687 transitions. [2022-01-19 02:52:04,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5790136587550381 [2022-01-19 02:52:04,821 INFO L72 ComplementDD]: Start complementDD. Operand 308 states and 20687 transitions. [2022-01-19 02:52:04,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 308 states and 20687 transitions. [2022-01-19 02:52:04,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:52:04,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 308 states and 20687 transitions. [2022-01-19 02:52:04,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 309 states, 308 states have (on average 67.16558441558442) internal successors, (20687), 308 states have internal predecessors, (20687), 0 states have call successors, (0), 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 02:52:04,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 309 states, 309 states have (on average 116.0) internal successors, (35844), 309 states have internal predecessors, (35844), 0 states have call successors, (0), 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 02:52:04,876 INFO L81 ComplementDD]: Finished complementDD. Result has 309 states, 309 states have (on average 116.0) internal successors, (35844), 309 states have internal predecessors, (35844), 0 states have call successors, (0), 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 02:52:04,876 INFO L186 Difference]: Start difference. First operand has 288 places, 373 transitions, 5846 flow. Second operand 308 states and 20687 transitions. [2022-01-19 02:52:04,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 3102 transitions, 62146 flow [2022-01-19 02:52:06,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 3102 transitions, 58747 flow, removed 1058 selfloop flow, removed 27 redundant places. [2022-01-19 02:52:06,385 INFO L242 Difference]: Finished difference. Result has 748 places, 2171 transitions, 46105 flow [2022-01-19 02:52:06,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=5375, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=308, PETRI_FLOW=46105, PETRI_PLACES=748, PETRI_TRANSITIONS=2171} [2022-01-19 02:52:06,386 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 645 predicate places. [2022-01-19 02:52:06,386 INFO L470 AbstractCegarLoop]: Abstraction has has 748 places, 2171 transitions, 46105 flow [2022-01-19 02:52:06,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 66.60975609756098) internal successors, (2731), 41 states have internal predecessors, (2731), 0 states have call successors, (0), 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 02:52:06,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:52:06,386 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:52:06,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 02:52:06,600 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 02:52:06,601 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:52:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:52:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1115818279, now seen corresponding path program 16 times [2022-01-19 02:52:06,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:52:06,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214935906] [2022-01-19 02:52:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:52:06,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:52:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:52:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 02:52:06,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:52:06,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214935906] [2022-01-19 02:52:06,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214935906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:52:06,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756571397] [2022-01-19 02:52:06,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:52:06,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:52:06,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:52:06,652 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:52:06,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 02:52:06,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:52:06,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:52:06,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 02:52:06,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:52:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 02:52:06,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:52:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 02:52:07,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756571397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:52:07,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:52:07,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-19 02:52:07,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488419909] [2022-01-19 02:52:07,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:52:07,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 02:52:07,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:52:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 02:52:07,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-19 02:52:07,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 02:52:07,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 2171 transitions, 46105 flow. Second operand has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 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 02:52:07,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:52:07,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 02:52:07,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:52:23,157 INFO L129 PetriNetUnfolder]: 5844/31369 cut-off events. [2022-01-19 02:52:23,157 INFO L130 PetriNetUnfolder]: For 4424435/4431871 co-relation queries the response was YES. [2022-01-19 02:52:24,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281214 conditions, 31369 events. 5844/31369 cut-off events. For 4424435/4431871 co-relation queries the response was YES. Maximal size of possible extension queue 1926. Compared 489667 event pairs, 581 based on Foata normal form. 490/29068 useless extension candidates. Maximal degree in co-relation 280965. Up to 7552 conditions per place. [2022-01-19 02:52:24,509 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 1173 selfloop transitions, 1334 changer transitions 41/2794 dead transitions. [2022-01-19 02:52:24,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 2794 transitions, 65746 flow [2022-01-19 02:52:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:52:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:52:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2022-01-19 02:52:24,510 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9181034482758621 [2022-01-19 02:52:24,510 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2022-01-19 02:52:24,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2022-01-19 02:52:24,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:52:24,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2022-01-19 02:52:24,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 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 02:52:24,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 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 02:52:24,512 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 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 02:52:24,512 INFO L186 Difference]: Start difference. First operand has 748 places, 2171 transitions, 46105 flow. Second operand 6 states and 639 transitions. [2022-01-19 02:52:24,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 2794 transitions, 65746 flow [2022-01-19 02:52:44,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 2794 transitions, 50159 flow, removed 7501 selfloop flow, removed 108 redundant places. [2022-01-19 02:52:44,700 INFO L242 Difference]: Finished difference. Result has 562 places, 2633 transitions, 49434 flow [2022-01-19 02:52:44,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=36307, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=49434, PETRI_PLACES=562, PETRI_TRANSITIONS=2633} [2022-01-19 02:52:44,703 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 459 predicate places. [2022-01-19 02:52:44,703 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 2633 transitions, 49434 flow [2022-01-19 02:52:44,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 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 02:52:44,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:52:44,703 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:52:44,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-19 02:52:44,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:52:44,922 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:52:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:52:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash -667568367, now seen corresponding path program 17 times [2022-01-19 02:52:44,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:52:44,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025022108] [2022-01-19 02:52:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:52:44,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:52:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:52:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 02:52:45,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:52:45,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025022108] [2022-01-19 02:52:45,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025022108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:52:45,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137500704] [2022-01-19 02:52:45,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:52:45,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:52:45,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:52:45,069 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:52:45,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 02:52:45,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-19 02:52:45,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:52:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 02:52:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:52:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:52:45,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:52:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:52:46,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137500704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:52:46,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:52:46,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-19 02:52:46,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103743375] [2022-01-19 02:52:46,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:52:46,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-19 02:52:46,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:52:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-19 02:52:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2022-01-19 02:52:46,200 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 02:52:46,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 2633 transitions, 49434 flow. Second operand has 43 states, 43 states have (on average 88.3953488372093) internal successors, (3801), 43 states have internal predecessors, (3801), 0 states have call successors, (0), 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 02:52:46,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:52:46,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 02:52:46,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:52:54,983 INFO L129 PetriNetUnfolder]: 2669/18597 cut-off events. [2022-01-19 02:52:54,984 INFO L130 PetriNetUnfolder]: For 2515003/2519497 co-relation queries the response was YES. [2022-01-19 02:52:55,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148980 conditions, 18597 events. 2669/18597 cut-off events. For 2515003/2519497 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 287254 event pairs, 341 based on Foata normal form. 1388/18239 useless extension candidates. Maximal degree in co-relation 148821. Up to 3146 conditions per place. [2022-01-19 02:52:55,257 INFO L132 encePairwiseOnDemand]: 103/116 looper letters, 409 selfloop transitions, 63 changer transitions 1104/1677 dead transitions. [2022-01-19 02:52:55,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1677 transitions, 35317 flow [2022-01-19 02:52:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 02:52:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 02:52:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1956 transitions. [2022-01-19 02:52:55,259 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7664576802507836 [2022-01-19 02:52:55,259 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1956 transitions. [2022-01-19 02:52:55,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1956 transitions. [2022-01-19 02:52:55,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:52:55,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1956 transitions. [2022-01-19 02:52:55,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 88.9090909090909) internal successors, (1956), 22 states have internal predecessors, (1956), 0 states have call successors, (0), 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 02:52:55,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 02:52:55,263 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 02:52:55,263 INFO L186 Difference]: Start difference. First operand has 562 places, 2633 transitions, 49434 flow. Second operand 22 states and 1956 transitions. [2022-01-19 02:52:55,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1677 transitions, 35317 flow [2022-01-19 02:53:01,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1677 transitions, 34792 flow, removed 117 selfloop flow, removed 26 redundant places. [2022-01-19 02:53:01,886 INFO L242 Difference]: Finished difference. Result has 490 places, 565 transitions, 11339 flow [2022-01-19 02:53:01,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=29806, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11339, PETRI_PLACES=490, PETRI_TRANSITIONS=565} [2022-01-19 02:53:01,887 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 387 predicate places. [2022-01-19 02:53:01,887 INFO L470 AbstractCegarLoop]: Abstraction has has 490 places, 565 transitions, 11339 flow [2022-01-19 02:53:01,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 88.3953488372093) internal successors, (3801), 43 states have internal predecessors, (3801), 0 states have call successors, (0), 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 02:53:01,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:53:01,888 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:01,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 02:53:02,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:02,104 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:53:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:53:02,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1420353594, now seen corresponding path program 18 times [2022-01-19 02:53:02,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:53:02,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526671235] [2022-01-19 02:53:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:53:02,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:53:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:02,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:53:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526671235] [2022-01-19 02:53:02,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526671235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:53:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89451467] [2022-01-19 02:53:02,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:53:02,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:02,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:53:02,504 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:53:02,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 02:53:02,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-19 02:53:02,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:53:02,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-19 02:53:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:53:02,705 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 02:53:02,902 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:53:02,902 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 02:53:03,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 02:53:03,711 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 02:53:03,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 02:53:04,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-19 02:53:04,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:53:04,159 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 17 treesize of output 10 [2022-01-19 02:53:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-19 02:53:04,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:53:05,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:53:05,435 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 1 case distinctions, treesize of input 64 treesize of output 52 [2022-01-19 02:53:05,441 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 02:53:05,442 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 156 treesize of output 141 [2022-01-19 02:53:05,448 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-19 02:53:05,448 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 136 treesize of output 104 [2022-01-19 02:53:05,454 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-19 02:53:05,454 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 83 treesize of output 67 [2022-01-19 02:53:06,266 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 02:53:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-19 02:53:06,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89451467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:53:06,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:53:06,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31, 30] total 76 [2022-01-19 02:53:06,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475877404] [2022-01-19 02:53:06,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:53:06,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-19 02:53:06,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:53:06,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-19 02:53:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=4968, Unknown=65, NotChecked=0, Total=5700 [2022-01-19 02:53:06,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 116 [2022-01-19 02:53:06,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 565 transitions, 11339 flow. Second operand has 76 states, 76 states have (on average 48.55263157894737) internal successors, (3690), 76 states have internal predecessors, (3690), 0 states have call successors, (0), 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 02:53:06,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:53:06,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 116 [2022-01-19 02:53:06,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:53:10,906 INFO L129 PetriNetUnfolder]: 1681/9284 cut-off events. [2022-01-19 02:53:10,906 INFO L130 PetriNetUnfolder]: For 762758/763368 co-relation queries the response was YES. [2022-01-19 02:53:10,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70073 conditions, 9284 events. 1681/9284 cut-off events. For 762758/763368 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 118075 event pairs, 137 based on Foata normal form. 67/8437 useless extension candidates. Maximal degree in co-relation 69937. Up to 2727 conditions per place. [2022-01-19 02:53:11,026 INFO L132 encePairwiseOnDemand]: 84/116 looper letters, 554 selfloop transitions, 359 changer transitions 36/989 dead transitions. [2022-01-19 02:53:11,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 989 transitions, 25092 flow [2022-01-19 02:53:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 02:53:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 02:53:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3736 transitions. [2022-01-19 02:53:11,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42942528735632185 [2022-01-19 02:53:11,029 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3736 transitions. [2022-01-19 02:53:11,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3736 transitions. [2022-01-19 02:53:11,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:53:11,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3736 transitions. [2022-01-19 02:53:11,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 49.81333333333333) internal successors, (3736), 75 states have internal predecessors, (3736), 0 states have call successors, (0), 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 02:53:11,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 116.0) internal successors, (8816), 76 states have internal predecessors, (8816), 0 states have call successors, (0), 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 02:53:11,038 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 116.0) internal successors, (8816), 76 states have internal predecessors, (8816), 0 states have call successors, (0), 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 02:53:11,038 INFO L186 Difference]: Start difference. First operand has 490 places, 565 transitions, 11339 flow. Second operand 75 states and 3736 transitions. [2022-01-19 02:53:11,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 989 transitions, 25092 flow [2022-01-19 02:53:11,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 989 transitions, 19047 flow, removed 2191 selfloop flow, removed 87 redundant places. [2022-01-19 02:53:11,803 INFO L242 Difference]: Finished difference. Result has 384 places, 873 transitions, 17195 flow [2022-01-19 02:53:11,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=9927, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=17195, PETRI_PLACES=384, PETRI_TRANSITIONS=873} [2022-01-19 02:53:11,804 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 281 predicate places. [2022-01-19 02:53:11,804 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 873 transitions, 17195 flow [2022-01-19 02:53:11,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 48.55263157894737) internal successors, (3690), 76 states have internal predecessors, (3690), 0 states have call successors, (0), 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 02:53:11,804 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:53:11,805 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:11,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 02:53:12,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:12,021 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:53:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:53:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash 584791968, now seen corresponding path program 19 times [2022-01-19 02:53:12,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:53:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78663100] [2022-01-19 02:53:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:53:12,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:53:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:12,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:53:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78663100] [2022-01-19 02:53:12,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78663100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:53:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256215030] [2022-01-19 02:53:12,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:53:12,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:12,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:53:12,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:53:12,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 02:53:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:12,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-19 02:53:12,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:53:13,117 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 15 treesize of output 7 [2022-01-19 02:53:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 02:53:13,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:53:13,247 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 02:53:13,247 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 28 treesize of output 13 [2022-01-19 02:53:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-19 02:53:13,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256215030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:53:13,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:53:13,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 13] total 37 [2022-01-19 02:53:13,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465361192] [2022-01-19 02:53:13,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:53:13,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 02:53:13,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:53:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 02:53:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 02:53:13,540 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-01-19 02:53:13,542 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 873 transitions, 17195 flow. Second operand has 37 states, 37 states have (on average 63.189189189189186) internal successors, (2338), 37 states have internal predecessors, (2338), 0 states have call successors, (0), 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 02:53:13,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:53:13,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-01-19 02:53:13,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:53:18,516 INFO L129 PetriNetUnfolder]: 2063/10989 cut-off events. [2022-01-19 02:53:18,516 INFO L130 PetriNetUnfolder]: For 216275/216892 co-relation queries the response was YES. [2022-01-19 02:53:18,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56292 conditions, 10989 events. 2063/10989 cut-off events. For 216275/216892 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 142192 event pairs, 3 based on Foata normal form. 227/10210 useless extension candidates. Maximal degree in co-relation 56191. Up to 2527 conditions per place. [2022-01-19 02:53:18,630 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 499 selfloop transitions, 751 changer transitions 177/1477 dead transitions. [2022-01-19 02:53:18,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1477 transitions, 32857 flow [2022-01-19 02:53:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-19 02:53:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-01-19 02:53:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 7467 transitions. [2022-01-19 02:53:18,635 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5549197384066588 [2022-01-19 02:53:18,635 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 7467 transitions. [2022-01-19 02:53:18,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 7467 transitions. [2022-01-19 02:53:18,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:53:18,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 7467 transitions. [2022-01-19 02:53:18,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 64.37068965517241) internal successors, (7467), 116 states have internal predecessors, (7467), 0 states have call successors, (0), 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 02:53:18,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 116.0) internal successors, (13572), 117 states have internal predecessors, (13572), 0 states have call successors, (0), 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 02:53:18,651 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 116.0) internal successors, (13572), 117 states have internal predecessors, (13572), 0 states have call successors, (0), 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 02:53:18,651 INFO L186 Difference]: Start difference. First operand has 384 places, 873 transitions, 17195 flow. Second operand 116 states and 7467 transitions. [2022-01-19 02:53:18,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1477 transitions, 32857 flow [2022-01-19 02:53:19,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1477 transitions, 30274 flow, removed 1216 selfloop flow, removed 34 redundant places. [2022-01-19 02:53:19,223 INFO L242 Difference]: Finished difference. Result has 509 places, 998 transitions, 21117 flow [2022-01-19 02:53:19,224 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=15899, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=21117, PETRI_PLACES=509, PETRI_TRANSITIONS=998} [2022-01-19 02:53:19,224 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 406 predicate places. [2022-01-19 02:53:19,224 INFO L470 AbstractCegarLoop]: Abstraction has has 509 places, 998 transitions, 21117 flow [2022-01-19 02:53:19,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 63.189189189189186) internal successors, (2338), 37 states have internal predecessors, (2338), 0 states have call successors, (0), 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 02:53:19,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:53:19,225 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:19,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 02:53:19,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:19,439 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:53:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:53:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 783371322, now seen corresponding path program 20 times [2022-01-19 02:53:19,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:53:19,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334601594] [2022-01-19 02:53:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:53:19,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:53:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:19,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:53:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334601594] [2022-01-19 02:53:19,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334601594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:53:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802122204] [2022-01-19 02:53:19,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:53:19,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:19,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:53:19,913 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:53:19,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 02:53:20,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:53:20,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:53:20,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-19 02:53:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:53:20,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:53:20,910 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 02:53:21,073 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 02:53:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 02:53:21,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:53:21,238 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_647 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_647) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2022-01-19 02:53:21,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:53:21,253 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 47 treesize of output 47 [2022-01-19 02:53:21,256 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 14 treesize of output 7 [2022-01-19 02:53:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-19 02:53:21,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802122204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:53:21,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:53:21,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 20] total 63 [2022-01-19 02:53:21,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25096003] [2022-01-19 02:53:21,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:53:21,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-19 02:53:21,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:53:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-19 02:53:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3523, Unknown=1, NotChecked=120, Total=3906 [2022-01-19 02:53:21,774 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 116 [2022-01-19 02:53:21,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 998 transitions, 21117 flow. Second operand has 63 states, 63 states have (on average 53.74603174603175) internal successors, (3386), 63 states have internal predecessors, (3386), 0 states have call successors, (0), 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 02:53:21,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:53:21,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 116 [2022-01-19 02:53:21,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:53:27,634 INFO L129 PetriNetUnfolder]: 2544/12707 cut-off events. [2022-01-19 02:53:27,634 INFO L130 PetriNetUnfolder]: For 291560/293013 co-relation queries the response was YES. [2022-01-19 02:53:27,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68240 conditions, 12707 events. 2544/12707 cut-off events. For 291560/293013 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 164830 event pairs, 1 based on Foata normal form. 357/11856 useless extension candidates. Maximal degree in co-relation 68095. Up to 2896 conditions per place. [2022-01-19 02:53:27,788 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 386 selfloop transitions, 922 changer transitions 57/1409 dead transitions. [2022-01-19 02:53:27,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1409 transitions, 32664 flow [2022-01-19 02:53:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-19 02:53:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-01-19 02:53:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2939 transitions. [2022-01-19 02:53:27,790 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4780416395575797 [2022-01-19 02:53:27,790 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2939 transitions. [2022-01-19 02:53:27,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2939 transitions. [2022-01-19 02:53:27,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:53:27,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2939 transitions. [2022-01-19 02:53:27,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 55.45283018867924) internal successors, (2939), 53 states have internal predecessors, (2939), 0 states have call successors, (0), 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 02:53:27,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 116.0) internal successors, (6264), 54 states have internal predecessors, (6264), 0 states have call successors, (0), 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 02:53:27,796 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 116.0) internal successors, (6264), 54 states have internal predecessors, (6264), 0 states have call successors, (0), 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 02:53:27,797 INFO L186 Difference]: Start difference. First operand has 509 places, 998 transitions, 21117 flow. Second operand 53 states and 2939 transitions. [2022-01-19 02:53:27,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1409 transitions, 32664 flow [2022-01-19 02:53:28,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1409 transitions, 30969 flow, removed 254 selfloop flow, removed 71 redundant places. [2022-01-19 02:53:28,691 INFO L242 Difference]: Finished difference. Result has 463 places, 1170 transitions, 26123 flow [2022-01-19 02:53:28,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=19563, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=750, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=26123, PETRI_PLACES=463, PETRI_TRANSITIONS=1170} [2022-01-19 02:53:28,692 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 360 predicate places. [2022-01-19 02:53:28,692 INFO L470 AbstractCegarLoop]: Abstraction has has 463 places, 1170 transitions, 26123 flow [2022-01-19 02:53:28,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 53.74603174603175) internal successors, (3386), 63 states have internal predecessors, (3386), 0 states have call successors, (0), 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 02:53:28,692 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:53:28,693 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:28,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 02:53:28,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-19 02:53:28,894 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:53:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:53:28,894 INFO L85 PathProgramCache]: Analyzing trace with hash 233378092, now seen corresponding path program 21 times [2022-01-19 02:53:28,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:53:28,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372477789] [2022-01-19 02:53:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:53:28,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:53:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-19 02:53:28,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:53:28,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372477789] [2022-01-19 02:53:28,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372477789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:53:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806012698] [2022-01-19 02:53:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:53:28,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:53:28,946 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:53:28,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 02:53:29,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-19 02:53:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:53:29,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-19 02:53:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:53:30,138 INFO L353 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2022-01-19 02:53:30,139 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 30 treesize of output 13 [2022-01-19 02:53:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 73 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:53:30,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:53:30,454 INFO L353 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2022-01-19 02:53:30,455 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 44 treesize of output 36 [2022-01-19 02:53:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 93 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 02:53:31,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806012698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:53:31,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:53:31,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 25] total 50 [2022-01-19 02:53:31,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861637921] [2022-01-19 02:53:31,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:53:31,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-19 02:53:31,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:53:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-19 02:53:31,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2022-01-19 02:53:31,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2022-01-19 02:53:31,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1170 transitions, 26123 flow. Second operand has 50 states, 50 states have (on average 66.28) internal successors, (3314), 50 states have internal predecessors, (3314), 0 states have call successors, (0), 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 02:53:31,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:53:31,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2022-01-19 02:53:31,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:53:48,094 INFO L129 PetriNetUnfolder]: 7742/40063 cut-off events. [2022-01-19 02:53:48,094 INFO L130 PetriNetUnfolder]: For 1174737/1179668 co-relation queries the response was YES. [2022-01-19 02:53:48,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232946 conditions, 40063 events. 7742/40063 cut-off events. For 1174737/1179668 co-relation queries the response was YES. Maximal size of possible extension queue 1889. Compared 630521 event pairs, 125 based on Foata normal form. 853/37298 useless extension candidates. Maximal degree in co-relation 232839. Up to 9634 conditions per place. [2022-01-19 02:53:48,645 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 715 selfloop transitions, 1517 changer transitions 1640/3928 dead transitions. [2022-01-19 02:53:48,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 3928 transitions, 101117 flow [2022-01-19 02:53:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-01-19 02:53:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2022-01-19 02:53:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 11801 transitions. [2022-01-19 02:53:48,651 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5846710265556877 [2022-01-19 02:53:48,651 INFO L72 ComplementDD]: Start complementDD. Operand 174 states and 11801 transitions. [2022-01-19 02:53:48,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 174 states and 11801 transitions. [2022-01-19 02:53:48,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:53:48,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 174 states and 11801 transitions. [2022-01-19 02:53:48,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 175 states, 174 states have (on average 67.82183908045977) internal successors, (11801), 174 states have internal predecessors, (11801), 0 states have call successors, (0), 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 02:53:48,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 175 states, 175 states have (on average 116.0) internal successors, (20300), 175 states have internal predecessors, (20300), 0 states have call successors, (0), 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 02:53:48,671 INFO L81 ComplementDD]: Finished complementDD. Result has 175 states, 175 states have (on average 116.0) internal successors, (20300), 175 states have internal predecessors, (20300), 0 states have call successors, (0), 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 02:53:48,671 INFO L186 Difference]: Start difference. First operand has 463 places, 1170 transitions, 26123 flow. Second operand 174 states and 11801 transitions. [2022-01-19 02:53:48,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 3928 transitions, 101117 flow [2022-01-19 02:53:54,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 3928 transitions, 95472 flow, removed 1985 selfloop flow, removed 32 redundant places. [2022-01-19 02:53:54,224 INFO L242 Difference]: Finished difference. Result has 702 places, 2020 transitions, 52202 flow [2022-01-19 02:53:54,225 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=24422, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=52202, PETRI_PLACES=702, PETRI_TRANSITIONS=2020} [2022-01-19 02:53:54,226 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 599 predicate places. [2022-01-19 02:53:54,226 INFO L470 AbstractCegarLoop]: Abstraction has has 702 places, 2020 transitions, 52202 flow [2022-01-19 02:53:54,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 66.28) internal successors, (3314), 50 states have internal predecessors, (3314), 0 states have call successors, (0), 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 02:53:54,226 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:53:54,226 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:54,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 02:53:54,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-19 02:53:54,427 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:53:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:53:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash 249619902, now seen corresponding path program 22 times [2022-01-19 02:53:54,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:53:54,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611093559] [2022-01-19 02:53:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:53:54,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:53:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-19 02:53:54,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:53:54,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611093559] [2022-01-19 02:53:54,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611093559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:53:54,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178789265] [2022-01-19 02:53:54,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:53:54,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:54,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:53:54,658 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:53:54,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 02:53:54,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:53:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:53:54,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 02:53:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:53:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-19 02:53:55,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:53:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-19 02:53:56,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178789265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:53:56,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:53:56,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2022-01-19 02:53:56,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432398319] [2022-01-19 02:53:56,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:53:56,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-19 02:53:56,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:53:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-19 02:53:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2396, Unknown=0, NotChecked=0, Total=2970 [2022-01-19 02:53:56,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 02:53:56,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 2020 transitions, 52202 flow. Second operand has 55 states, 55 states have (on average 88.16363636363636) internal successors, (4849), 55 states have internal predecessors, (4849), 0 states have call successors, (0), 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 02:53:56,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:53:56,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 02:53:56,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:54:05,722 INFO L129 PetriNetUnfolder]: 3191/20105 cut-off events. [2022-01-19 02:54:05,722 INFO L130 PetriNetUnfolder]: For 602628/604867 co-relation queries the response was YES. [2022-01-19 02:54:06,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115860 conditions, 20105 events. 3191/20105 cut-off events. For 602628/604867 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 288436 event pairs, 452 based on Foata normal form. 322/18500 useless extension candidates. Maximal degree in co-relation 115657. Up to 4683 conditions per place. [2022-01-19 02:54:06,097 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 1097 selfloop transitions, 90 changer transitions 410/1722 dead transitions. [2022-01-19 02:54:06,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 1722 transitions, 46910 flow [2022-01-19 02:54:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 02:54:06,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 02:54:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3372 transitions. [2022-01-19 02:54:06,099 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76497277676951 [2022-01-19 02:54:06,099 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3372 transitions. [2022-01-19 02:54:06,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3372 transitions. [2022-01-19 02:54:06,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:54:06,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3372 transitions. [2022-01-19 02:54:06,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 88.73684210526316) internal successors, (3372), 38 states have internal predecessors, (3372), 0 states have call successors, (0), 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 02:54:06,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 116.0) internal successors, (4524), 39 states have internal predecessors, (4524), 0 states have call successors, (0), 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 02:54:06,105 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 116.0) internal successors, (4524), 39 states have internal predecessors, (4524), 0 states have call successors, (0), 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 02:54:06,105 INFO L186 Difference]: Start difference. First operand has 702 places, 2020 transitions, 52202 flow. Second operand 38 states and 3372 transitions. [2022-01-19 02:54:06,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 1722 transitions, 46910 flow [2022-01-19 02:54:08,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1722 transitions, 45264 flow, removed 584 selfloop flow, removed 113 redundant places. [2022-01-19 02:54:09,027 INFO L242 Difference]: Finished difference. Result has 539 places, 1304 transitions, 32714 flow [2022-01-19 02:54:09,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=39737, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=32714, PETRI_PLACES=539, PETRI_TRANSITIONS=1304} [2022-01-19 02:54:09,028 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 436 predicate places. [2022-01-19 02:54:09,028 INFO L470 AbstractCegarLoop]: Abstraction has has 539 places, 1304 transitions, 32714 flow [2022-01-19 02:54:09,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 88.16363636363636) internal successors, (4849), 55 states have internal predecessors, (4849), 0 states have call successors, (0), 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 02:54:09,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:54:09,029 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:09,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 02:54:09,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 02:54:09,229 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:54:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:54:09,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1665050755, now seen corresponding path program 23 times [2022-01-19 02:54:09,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:54:09,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674441688] [2022-01-19 02:54:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:54:09,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:54:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:54:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:54:09,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:54:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674441688] [2022-01-19 02:54:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674441688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:54:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050659416] [2022-01-19 02:54:09,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:54:09,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:54:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:54:09,680 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:54:09,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 02:54:09,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-19 02:54:09,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:54:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-19 02:54:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:54:10,510 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 02:54:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 02:54:10,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:54:10,685 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 02:54:10,686 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 28 treesize of output 13 [2022-01-19 02:54:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 02:54:11,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050659416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:54:11,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:54:11,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 15] total 57 [2022-01-19 02:54:11,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410288122] [2022-01-19 02:54:11,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:54:11,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 02:54:11,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:54:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 02:54:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2022-01-19 02:54:11,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-01-19 02:54:11,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1304 transitions, 32714 flow. Second operand has 57 states, 57 states have (on average 62.85964912280702) internal successors, (3583), 57 states have internal predecessors, (3583), 0 states have call successors, (0), 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 02:54:11,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:54:11,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-01-19 02:54:11,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:54:21,961 INFO L129 PetriNetUnfolder]: 4022/20719 cut-off events. [2022-01-19 02:54:21,961 INFO L130 PetriNetUnfolder]: For 605166/605691 co-relation queries the response was YES. [2022-01-19 02:54:22,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125278 conditions, 20719 events. 4022/20719 cut-off events. For 605166/605691 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 292751 event pairs, 4 based on Foata normal form. 128/19056 useless extension candidates. Maximal degree in co-relation 125151. Up to 4949 conditions per place. [2022-01-19 02:54:22,307 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 424 selfloop transitions, 1318 changer transitions 236/2028 dead transitions. [2022-01-19 02:54:22,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 2028 transitions, 53839 flow [2022-01-19 02:54:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-19 02:54:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2022-01-19 02:54:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 10195 transitions. [2022-01-19 02:54:22,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5562527280663466 [2022-01-19 02:54:22,313 INFO L72 ComplementDD]: Start complementDD. Operand 158 states and 10195 transitions. [2022-01-19 02:54:22,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 158 states and 10195 transitions. [2022-01-19 02:54:22,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:54:22,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 158 states and 10195 transitions. [2022-01-19 02:54:22,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 159 states, 158 states have (on average 64.5253164556962) internal successors, (10195), 158 states have internal predecessors, (10195), 0 states have call successors, (0), 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 02:54:22,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 159 states, 159 states have (on average 116.0) internal successors, (18444), 159 states have internal predecessors, (18444), 0 states have call successors, (0), 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 02:54:22,330 INFO L81 ComplementDD]: Finished complementDD. Result has 159 states, 159 states have (on average 116.0) internal successors, (18444), 159 states have internal predecessors, (18444), 0 states have call successors, (0), 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 02:54:22,330 INFO L186 Difference]: Start difference. First operand has 539 places, 1304 transitions, 32714 flow. Second operand 158 states and 10195 transitions. [2022-01-19 02:54:22,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 2028 transitions, 53839 flow [2022-01-19 02:54:24,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 2028 transitions, 51672 flow, removed 987 selfloop flow, removed 46 redundant places. [2022-01-19 02:54:24,567 INFO L242 Difference]: Finished difference. Result has 651 places, 1492 transitions, 41465 flow [2022-01-19 02:54:24,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=31941, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=41465, PETRI_PLACES=651, PETRI_TRANSITIONS=1492} [2022-01-19 02:54:24,568 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 548 predicate places. [2022-01-19 02:54:24,568 INFO L470 AbstractCegarLoop]: Abstraction has has 651 places, 1492 transitions, 41465 flow [2022-01-19 02:54:24,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 62.85964912280702) internal successors, (3583), 57 states have internal predecessors, (3583), 0 states have call successors, (0), 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 02:54:24,568 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:54:24,569 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:24,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 02:54:24,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:54:24,783 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:54:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:54:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2021594383, now seen corresponding path program 24 times [2022-01-19 02:54:24,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:54:24,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117613285] [2022-01-19 02:54:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:54:24,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:54:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:54:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:54:25,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:54:25,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117613285] [2022-01-19 02:54:25,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117613285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:54:25,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341187632] [2022-01-19 02:54:25,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:54:25,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:54:25,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:54:25,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:54:25,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 02:54:25,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-19 02:54:25,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:54:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-19 02:54:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:54:25,889 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 02:54:25,974 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:54:25,974 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 02:54:26,352 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 02:54:26,537 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 02:54:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 02:54:26,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:54:26,616 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_801 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_801) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2022-01-19 02:54:26,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:54:26,635 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 47 treesize of output 47 [2022-01-19 02:54:26,637 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 14 treesize of output 7 [2022-01-19 02:54:27,101 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 02:54:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 02:54:27,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341187632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:54:27,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:54:27,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22, 22] total 51 [2022-01-19 02:54:27,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785813660] [2022-01-19 02:54:27,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:54:27,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-19 02:54:27,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:54:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-19 02:54:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2258, Unknown=1, NotChecked=96, Total=2550 [2022-01-19 02:54:27,121 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 116 [2022-01-19 02:54:27,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 1492 transitions, 41465 flow. Second operand has 51 states, 51 states have (on average 53.78431372549019) internal successors, (2743), 51 states have internal predecessors, (2743), 0 states have call successors, (0), 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 02:54:27,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:54:27,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 116 [2022-01-19 02:54:27,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:54:45,334 INFO L129 PetriNetUnfolder]: 7524/40520 cut-off events. [2022-01-19 02:54:45,335 INFO L130 PetriNetUnfolder]: For 1087924/1091988 co-relation queries the response was YES. [2022-01-19 02:54:46,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237617 conditions, 40520 events. 7524/40520 cut-off events. For 1087924/1091988 co-relation queries the response was YES. Maximal size of possible extension queue 1922. Compared 643794 event pairs, 160 based on Foata normal form. 428/37408 useless extension candidates. Maximal degree in co-relation 237450. Up to 9642 conditions per place. [2022-01-19 02:54:46,947 INFO L132 encePairwiseOnDemand]: 92/116 looper letters, 603 selfloop transitions, 2128 changer transitions 69/2844 dead transitions. [2022-01-19 02:54:46,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 2844 transitions, 85945 flow [2022-01-19 02:54:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 02:54:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 02:54:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3888 transitions. [2022-01-19 02:54:46,950 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47881773399014776 [2022-01-19 02:54:46,950 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3888 transitions. [2022-01-19 02:54:46,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3888 transitions. [2022-01-19 02:54:46,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:54:46,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3888 transitions. [2022-01-19 02:54:46,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.542857142857144) internal successors, (3888), 70 states have internal predecessors, (3888), 0 states have call successors, (0), 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 02:54:46,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 116.0) internal successors, (8236), 71 states have internal predecessors, (8236), 0 states have call successors, (0), 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 02:54:46,957 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 116.0) internal successors, (8236), 71 states have internal predecessors, (8236), 0 states have call successors, (0), 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 02:54:46,958 INFO L186 Difference]: Start difference. First operand has 651 places, 1492 transitions, 41465 flow. Second operand 70 states and 3888 transitions. [2022-01-19 02:54:46,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 2844 transitions, 85945 flow [2022-01-19 02:54:51,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 2844 transitions, 84556 flow, removed 454 selfloop flow, removed 84 redundant places. [2022-01-19 02:54:51,936 INFO L242 Difference]: Finished difference. Result has 613 places, 2615 transitions, 81307 flow [2022-01-19 02:54:51,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=40725, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=81307, PETRI_PLACES=613, PETRI_TRANSITIONS=2615} [2022-01-19 02:54:51,938 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 510 predicate places. [2022-01-19 02:54:51,938 INFO L470 AbstractCegarLoop]: Abstraction has has 613 places, 2615 transitions, 81307 flow [2022-01-19 02:54:51,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 53.78431372549019) internal successors, (2743), 51 states have internal predecessors, (2743), 0 states have call successors, (0), 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 02:54:51,938 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:54:51,938 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:51,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 02:54:52,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 02:54:52,151 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:54:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:54:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash 8200013, now seen corresponding path program 25 times [2022-01-19 02:54:52,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:54:52,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944541992] [2022-01-19 02:54:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:54:52,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:54:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:54:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-19 02:54:52,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:54:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944541992] [2022-01-19 02:54:52,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944541992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:54:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799520843] [2022-01-19 02:54:52,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:54:52,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:54:52,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:54:52,426 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:54:52,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 02:54:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:54:52,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 02:54:52,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:54:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 60 proven. 75 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-19 02:54:53,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:54:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-19 02:54:54,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799520843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:54:54,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:54:54,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2022-01-19 02:54:54,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120790300] [2022-01-19 02:54:54,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:54:54,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-19 02:54:54,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:54:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-19 02:54:54,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=3272, Unknown=0, NotChecked=0, Total=4032 [2022-01-19 02:54:54,048 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 02:54:54,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 2615 transitions, 81307 flow. Second operand has 64 states, 64 states have (on average 88.140625) internal successors, (5641), 64 states have internal predecessors, (5641), 0 states have call successors, (0), 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 02:54:54,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:54:54,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 02:54:54,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:55:17,880 INFO L129 PetriNetUnfolder]: 6978/45617 cut-off events. [2022-01-19 02:55:17,881 INFO L130 PetriNetUnfolder]: For 1406143/1412490 co-relation queries the response was YES. [2022-01-19 02:55:18,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271277 conditions, 45617 events. 6978/45617 cut-off events. For 1406143/1412490 co-relation queries the response was YES. Maximal size of possible extension queue 1908. Compared 751736 event pairs, 534 based on Foata normal form. 736/42013 useless extension candidates. Maximal degree in co-relation 271137. Up to 10624 conditions per place. [2022-01-19 02:55:19,035 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 2383 selfloop transitions, 270 changer transitions 601/3393 dead transitions. [2022-01-19 02:55:19,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 3393 transitions, 111551 flow [2022-01-19 02:55:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 02:55:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 02:55:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4175 transitions. [2022-01-19 02:55:19,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7657740278796772 [2022-01-19 02:55:19,037 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4175 transitions. [2022-01-19 02:55:19,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4175 transitions. [2022-01-19 02:55:19,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:55:19,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4175 transitions. [2022-01-19 02:55:19,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 88.82978723404256) internal successors, (4175), 47 states have internal predecessors, (4175), 0 states have call successors, (0), 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 02:55:19,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 116.0) internal successors, (5568), 48 states have internal predecessors, (5568), 0 states have call successors, (0), 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 02:55:19,043 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 116.0) internal successors, (5568), 48 states have internal predecessors, (5568), 0 states have call successors, (0), 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 02:55:19,043 INFO L186 Difference]: Start difference. First operand has 613 places, 2615 transitions, 81307 flow. Second operand 47 states and 4175 transitions. [2022-01-19 02:55:19,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 3393 transitions, 111551 flow [2022-01-19 02:55:26,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 3393 transitions, 105563 flow, removed 2278 selfloop flow, removed 36 redundant places. [2022-01-19 02:55:26,598 INFO L242 Difference]: Finished difference. Result has 645 places, 2755 transitions, 82037 flow [2022-01-19 02:55:26,600 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=75989, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=82037, PETRI_PLACES=645, PETRI_TRANSITIONS=2755} [2022-01-19 02:55:26,601 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 542 predicate places. [2022-01-19 02:55:26,601 INFO L470 AbstractCegarLoop]: Abstraction has has 645 places, 2755 transitions, 82037 flow [2022-01-19 02:55:26,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 88.140625) internal successors, (5641), 64 states have internal predecessors, (5641), 0 states have call successors, (0), 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 02:55:26,602 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:55:26,602 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:55:26,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 02:55:26,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 02:55:26,815 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:55:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:55:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash -679873953, now seen corresponding path program 26 times [2022-01-19 02:55:26,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:55:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587078515] [2022-01-19 02:55:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:55:26,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:55:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:55:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 02:55:26,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:55:26,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587078515] [2022-01-19 02:55:26,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587078515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:55:26,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538694364] [2022-01-19 02:55:26,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:55:26,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:55:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:55:26,876 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:55:26,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 02:55:26,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:55:26,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:55:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:55:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:55:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 02:55:27,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:55:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 02:55:27,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538694364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:55:27,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:55:27,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-19 02:55:27,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505687812] [2022-01-19 02:55:27,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:55:27,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 02:55:27,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:55:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 02:55:27,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-19 02:55:27,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 02:55:27,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 2755 transitions, 82037 flow. Second operand has 9 states, 9 states have (on average 104.11111111111111) internal successors, (937), 9 states have internal predecessors, (937), 0 states have call successors, (0), 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 02:55:27,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:55:27,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 02:55:27,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:55:57,687 INFO L129 PetriNetUnfolder]: 8680/54481 cut-off events. [2022-01-19 02:55:57,687 INFO L130 PetriNetUnfolder]: For 1825962/1829432 co-relation queries the response was YES. [2022-01-19 02:55:59,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 336009 conditions, 54481 events. 8680/54481 cut-off events. For 1825962/1829432 co-relation queries the response was YES. Maximal size of possible extension queue 2929. Compared 931934 event pairs, 373 based on Foata normal form. 569/50377 useless extension candidates. Maximal degree in co-relation 335851. Up to 12376 conditions per place. [2022-01-19 02:55:59,402 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 873 selfloop transitions, 2271 changer transitions 309/3630 dead transitions. [2022-01-19 02:55:59,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 3630 transitions, 115055 flow [2022-01-19 02:55:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 02:55:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 02:55:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 853 transitions. [2022-01-19 02:55:59,403 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9191810344827587 [2022-01-19 02:55:59,403 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 853 transitions. [2022-01-19 02:55:59,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 853 transitions. [2022-01-19 02:55:59,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:55:59,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 853 transitions. [2022-01-19 02:55:59,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.625) internal successors, (853), 8 states have internal predecessors, (853), 0 states have call successors, (0), 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 02:55:59,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 116.0) internal successors, (1044), 9 states have internal predecessors, (1044), 0 states have call successors, (0), 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 02:55:59,405 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 116.0) internal successors, (1044), 9 states have internal predecessors, (1044), 0 states have call successors, (0), 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 02:55:59,405 INFO L186 Difference]: Start difference. First operand has 645 places, 2755 transitions, 82037 flow. Second operand 8 states and 853 transitions. [2022-01-19 02:55:59,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 3630 transitions, 115055 flow [2022-01-19 02:56:09,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 3630 transitions, 113490 flow, removed 761 selfloop flow, removed 29 redundant places. [2022-01-19 02:56:10,070 INFO L242 Difference]: Finished difference. Result has 618 places, 3304 transitions, 106821 flow [2022-01-19 02:56:10,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=80472, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1712, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=106821, PETRI_PLACES=618, PETRI_TRANSITIONS=3304} [2022-01-19 02:56:10,073 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 515 predicate places. [2022-01-19 02:56:10,073 INFO L470 AbstractCegarLoop]: Abstraction has has 618 places, 3304 transitions, 106821 flow [2022-01-19 02:56:10,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.11111111111111) internal successors, (937), 9 states have internal predecessors, (937), 0 states have call successors, (0), 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 02:56:10,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:56:10,074 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:56:10,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 02:56:10,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:56:10,275 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:56:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:56:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash 325911152, now seen corresponding path program 27 times [2022-01-19 02:56:10,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:56:10,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530522941] [2022-01-19 02:56:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:56:10,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:56:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:56:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-19 02:56:10,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:56:10,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530522941] [2022-01-19 02:56:10,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530522941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:56:10,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794216017] [2022-01-19 02:56:10,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:56:10,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:56:10,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:56:10,842 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:56:10,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 02:56:11,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-19 02:56:11,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:56:11,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 89 conjunts are in the unsatisfiable core [2022-01-19 02:56:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:56:12,253 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 02:56:12,573 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 02:56:12,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:56:12,761 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 22 treesize of output 24 [2022-01-19 02:56:13,346 INFO L353 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2022-01-19 02:56:13,346 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 33 treesize of output 13 [2022-01-19 02:56:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-19 02:56:13,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:56:15,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:56:15,717 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 1 case distinctions, treesize of input 95 treesize of output 71 [2022-01-19 02:56:15,733 INFO L353 Elim1Store]: treesize reduction 49, result has 24.6 percent of original size [2022-01-19 02:56:15,733 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 198 treesize of output 181 [2022-01-19 02:56:15,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-19 02:56:15,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 105 [2022-01-19 02:56:15,752 INFO L353 Elim1Store]: treesize reduction 55, result has 15.4 percent of original size [2022-01-19 02:56:15,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 02:56:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 1 proven. 166 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-19 02:56:17,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794216017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:56:17,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:56:17,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 37, 37] total 95 [2022-01-19 02:56:17,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692007705] [2022-01-19 02:56:17,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:56:17,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-19 02:56:17,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:56:17,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-19 02:56:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=8152, Unknown=21, NotChecked=0, Total=8930 [2022-01-19 02:56:17,478 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 116 [2022-01-19 02:56:17,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 3304 transitions, 106821 flow. Second operand has 95 states, 95 states have (on average 48.45263157894737) internal successors, (4603), 95 states have internal predecessors, (4603), 0 states have call successors, (0), 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 02:56:17,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:56:17,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 116 [2022-01-19 02:56:17,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 03:00:16,241 INFO L129 PetriNetUnfolder]: 59157/288169 cut-off events. [2022-01-19 03:00:16,242 INFO L130 PetriNetUnfolder]: For 11251970/11270127 co-relation queries the response was YES.