/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-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 07:26:21,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 07:26:21,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 07:26:21,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 07:26:21,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 07:26:21,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 07:26:21,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 07:26:21,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 07:26:21,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 07:26:21,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 07:26:21,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 07:26:21,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 07:26:21,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 07:26:21,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 07:26:21,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 07:26:21,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 07:26:21,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 07:26:21,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 07:26:21,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 07:26:21,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 07:26:21,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 07:26:21,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 07:26:21,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 07:26:21,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 07:26:21,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 07:26:21,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 07:26:21,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 07:26:21,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 07:26:21,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 07:26:21,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 07:26:21,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 07:26:21,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 07:26:21,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 07:26:21,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 07:26:21,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 07:26:21,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 07:26:21,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 07:26:21,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 07:26:21,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 07:26:21,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 07:26:21,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 07:26:21,821 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-Before.epf [2022-01-19 07:26:21,834 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 07:26:21,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 07:26:21,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 07:26:21,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 07:26:21,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 07:26:21,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 07:26:21,835 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 07:26:21,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 07:26:21,836 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 07:26:21,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 07:26:21,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 07:26:21,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 07:26:21,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 07:26:21,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 07:26:21,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 07:26:21,836 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 07:26:21,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 07:26:21,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 07:26:21,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 07:26:21,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 07:26:21,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 07:26:21,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 07:26:21,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 07:26:21,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 07:26:21,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 07:26:21,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 07:26:21,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 07:26:21,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 07:26:21,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 07:26:21,838 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 07:26:21,838 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 07:26:21,838 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 07:26:21,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 07:26:22,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 07:26:22,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 07:26:22,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 07:26:22,060 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 07:26:22,061 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 07:26:22,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2022-01-19 07:26:22,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14853af3e/79a74df019664b1d95b36bb7c68a8f3c/FLAG06d9f1a9a [2022-01-19 07:26:22,416 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 07:26:22,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2022-01-19 07:26:22,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14853af3e/79a74df019664b1d95b36bb7c68a8f3c/FLAG06d9f1a9a [2022-01-19 07:26:22,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14853af3e/79a74df019664b1d95b36bb7c68a8f3c [2022-01-19 07:26:22,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 07:26:22,435 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 07:26:22,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 07:26:22,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 07:26:22,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 07:26:22,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbc024e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22, skipping insertion in model container [2022-01-19 07:26:22,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 07:26:22,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 07:26:22,605 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/mult-comm.wvr.c[1910,1923] [2022-01-19 07:26:22,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 07:26:22,611 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 07:26:22,622 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/mult-comm.wvr.c[1910,1923] [2022-01-19 07:26:22,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 07:26:22,631 INFO L208 MainTranslator]: Completed translation [2022-01-19 07:26:22,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22 WrapperNode [2022-01-19 07:26:22,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 07:26:22,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 07:26:22,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 07:26:22,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 07:26:22,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,663 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-01-19 07:26:22,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 07:26:22,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 07:26:22,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 07:26:22,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 07:26:22,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 07:26:22,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 07:26:22,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 07:26:22,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 07:26:22,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (1/1) ... [2022-01-19 07:26:22,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 07:26:22,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:26:22,715 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 07:26:22,733 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 07:26:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 07:26:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 07:26:22,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 07:26:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 07:26:22,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 07:26:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 07:26:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 07:26:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 07:26:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 07:26:22,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 07:26:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 07:26:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 07:26:22,753 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 07:26:22,817 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 07:26:22,818 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 07:26:22,972 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 07:26:22,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 07:26:22,977 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 07:26:22,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 07:26:22 BoogieIcfgContainer [2022-01-19 07:26:22,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 07:26:22,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 07:26:22,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 07:26:22,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 07:26:22,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 07:26:22" (1/3) ... [2022-01-19 07:26:22,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0faf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 07:26:22, skipping insertion in model container [2022-01-19 07:26:22,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:26:22" (2/3) ... [2022-01-19 07:26:22,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0faf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 07:26:22, skipping insertion in model container [2022-01-19 07:26:22,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 07:26:22" (3/3) ... [2022-01-19 07:26:22,991 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-01-19 07:26:22,995 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 07:26:22,995 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 07:26:22,995 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 07:26:23,022 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,024 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,024 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,027 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,029 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,031 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,032 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,032 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,033 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,033 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,034 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,034 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,034 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,034 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,034 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,034 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,035 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,035 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,035 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,035 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,035 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,035 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,036 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,036 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,036 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,037 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,037 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,037 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,037 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,037 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,038 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,038 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,038 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,038 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,038 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,038 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,038 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,038 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,039 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,039 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,041 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,043 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:26:23,046 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 07:26:23,077 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 07:26:23,081 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 07:26:23,081 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 07:26:23,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2022-01-19 07:26:23,114 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2022-01-19 07:26:23,117 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 07:26:23,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-01-19 07:26:23,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2022-01-19 07:26:23,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2022-01-19 07:26:23,147 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-01-19 07:26:23,148 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 07:26:23,148 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:23,148 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] [2022-01-19 07:26:23,149 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1776550383, now seen corresponding path program 1 times [2022-01-19 07:26:23,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:23,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716016689] [2022-01-19 07:26:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:23,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:23,310 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 07:26:23,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:23,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716016689] [2022-01-19 07:26:23,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716016689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:26:23,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:26:23,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 07:26:23,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346025618] [2022-01-19 07:26:23,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:26:23,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 07:26:23,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:26:23,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 07:26:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 07:26:23,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2022-01-19 07:26:23,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 07:26:23,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:26:23,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2022-01-19 07:26:23,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:26:23,381 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2022-01-19 07:26:23,381 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 07:26:23,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2022-01-19 07:26:23,382 INFO L132 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2022-01-19 07:26:23,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-01-19 07:26:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 07:26:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 07:26:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2022-01-19 07:26:23,391 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.94375 [2022-01-19 07:26:23,392 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2022-01-19 07:26:23,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2022-01-19 07:26:23,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:26:23,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2022-01-19 07:26:23,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 07:26:23,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 07:26:23,399 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 07:26:23,400 INFO L186 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2022-01-19 07:26:23,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-01-19 07:26:23,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 07:26:23,405 INFO L242 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2022-01-19 07:26:23,406 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-01-19 07:26:23,408 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-01-19 07:26:23,408 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2022-01-19 07:26:23,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 07:26:23,409 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:23,409 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] [2022-01-19 07:26:23,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 07:26:23,409 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:23,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2022-01-19 07:26:23,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:23,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533912671] [2022-01-19 07:26:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:23,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:23,596 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 07:26:23,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533912671] [2022-01-19 07:26:23,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533912671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:26:23,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:26:23,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 07:26:23,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052161675] [2022-01-19 07:26:23,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:26:23,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 07:26:23,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:26:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 07:26:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 07:26:23,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2022-01-19 07:26:23,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 07:26:23,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:26:23,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2022-01-19 07:26:23,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:26:23,685 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2022-01-19 07:26:23,685 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 07:26:23,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 126 events. 12/126 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 298 event pairs, 1 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 166. Up to 19 conditions per place. [2022-01-19 07:26:23,686 INFO L132 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-01-19 07:26:23,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2022-01-19 07:26:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 07:26:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 07:26:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2022-01-19 07:26:23,693 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2022-01-19 07:26:23,693 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2022-01-19 07:26:23,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2022-01-19 07:26:23,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:26:23,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2022-01-19 07:26:23,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 07:26:23,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 07:26:23,702 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 07:26:23,702 INFO L186 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2022-01-19 07:26:23,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2022-01-19 07:26:23,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 07:26:23,707 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2022-01-19 07:26:23,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-01-19 07:26:23,708 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-01-19 07:26:23,708 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2022-01-19 07:26:23,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 07:26:23,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:23,709 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] [2022-01-19 07:26:23,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 07:26:23,709 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:23,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1738455513, now seen corresponding path program 1 times [2022-01-19 07:26:23,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:23,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027708866] [2022-01-19 07:26:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:23,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:24,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:24,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027708866] [2022-01-19 07:26:24,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027708866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515295958] [2022-01-19 07:26:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:24,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:24,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:26:24,035 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 07:26:24,055 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 07:26:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 07:26:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:26:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:24,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:26:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:24,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515295958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:26:24,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:26:24,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2022-01-19 07:26:24,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434491180] [2022-01-19 07:26:24,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:26:24,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 07:26:24,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:26:24,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 07:26:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-19 07:26:24,816 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-01-19 07:26:24,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 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 07:26:24,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:26:24,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-01-19 07:26:24,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:26:25,276 INFO L129 PetriNetUnfolder]: 174/573 cut-off events. [2022-01-19 07:26:25,276 INFO L130 PetriNetUnfolder]: For 74/83 co-relation queries the response was YES. [2022-01-19 07:26:25,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 573 events. 174/573 cut-off events. For 74/83 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3194 event pairs, 15 based on Foata normal form. 4/499 useless extension candidates. Maximal degree in co-relation 1080. Up to 82 conditions per place. [2022-01-19 07:26:25,280 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 93 selfloop transitions, 31 changer transitions 19/184 dead transitions. [2022-01-19 07:26:25,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 184 transitions, 763 flow [2022-01-19 07:26:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-19 07:26:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-01-19 07:26:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1217 transitions. [2022-01-19 07:26:25,283 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7244047619047619 [2022-01-19 07:26:25,283 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1217 transitions. [2022-01-19 07:26:25,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1217 transitions. [2022-01-19 07:26:25,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:26:25,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1217 transitions. [2022-01-19 07:26:25,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.95238095238095) internal successors, (1217), 21 states have internal predecessors, (1217), 0 states have call successors, (0), 0 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 07:26:25,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 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 07:26:25,289 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 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 07:26:25,289 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 21 states and 1217 transitions. [2022-01-19 07:26:25,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 184 transitions, 763 flow [2022-01-19 07:26:25,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 184 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-01-19 07:26:25,293 INFO L242 Difference]: Finished difference. Result has 107 places, 92 transitions, 391 flow [2022-01-19 07:26:25,293 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=391, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2022-01-19 07:26:25,296 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-01-19 07:26:25,296 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 391 flow [2022-01-19 07:26:25,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 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 07:26:25,297 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:25,297 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] [2022-01-19 07:26:25,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 07:26:25,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:25,512 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:25,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1154719639, now seen corresponding path program 1 times [2022-01-19 07:26:25,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:25,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757456198] [2022-01-19 07:26:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:25,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:25,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757456198] [2022-01-19 07:26:25,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757456198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442896107] [2022-01-19 07:26:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:25,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:25,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:26:25,655 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 07:26:25,656 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 07:26:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:25,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 07:26:25,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:26:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:25,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:26:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:26,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442896107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:26:26,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:26:26,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2022-01-19 07:26:26,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809024773] [2022-01-19 07:26:26,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:26:26,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 07:26:26,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:26:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 07:26:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-19 07:26:26,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-01-19 07:26:26,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 391 flow. Second operand has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 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 07:26:26,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:26:26,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-01-19 07:26:26,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:26:26,933 INFO L129 PetriNetUnfolder]: 74/389 cut-off events. [2022-01-19 07:26:26,933 INFO L130 PetriNetUnfolder]: For 403/428 co-relation queries the response was YES. [2022-01-19 07:26:26,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 389 events. 74/389 cut-off events. For 403/428 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2086 event pairs, 5 based on Foata normal form. 17/382 useless extension candidates. Maximal degree in co-relation 914. Up to 142 conditions per place. [2022-01-19 07:26:26,936 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 39 selfloop transitions, 10 changer transitions 11/114 dead transitions. [2022-01-19 07:26:26,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 609 flow [2022-01-19 07:26:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 07:26:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 07:26:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2022-01-19 07:26:26,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76 [2022-01-19 07:26:26,940 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2022-01-19 07:26:26,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2022-01-19 07:26:26,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:26:26,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2022-01-19 07:26:26,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 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 07:26:26,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 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 07:26:26,943 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 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 07:26:26,943 INFO L186 Difference]: Start difference. First operand has 107 places, 92 transitions, 391 flow. Second operand 10 states and 608 transitions. [2022-01-19 07:26:26,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 609 flow [2022-01-19 07:26:26,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 114 transitions, 533 flow, removed 29 selfloop flow, removed 10 redundant places. [2022-01-19 07:26:26,954 INFO L242 Difference]: Finished difference. Result has 104 places, 92 transitions, 368 flow [2022-01-19 07:26:26,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2022-01-19 07:26:26,955 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2022-01-19 07:26:26,955 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 368 flow [2022-01-19 07:26:26,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 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 07:26:26,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:26,956 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] [2022-01-19 07:26:26,980 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 07:26:27,172 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,SelfDestructingSolverStorable3 [2022-01-19 07:26:27,172 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash -837475069, now seen corresponding path program 2 times [2022-01-19 07:26:27,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:27,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109347924] [2022-01-19 07:26:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:27,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:27,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109347924] [2022-01-19 07:26:27,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109347924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904609922] [2022-01-19 07:26:27,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 07:26:27,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:26:27,321 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 07:26:27,323 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 07:26:27,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:26:27,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:26:27,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 07:26:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:26:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:27,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:26:27,833 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 07:26:27,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904609922] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:27,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 07:26:27,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 16 [2022-01-19 07:26:27,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829486582] [2022-01-19 07:26:27,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:26:27,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 07:26:27,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:26:27,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 07:26:27,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-19 07:26:27,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-01-19 07:26:27,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 07:26:27,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:26:27,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-01-19 07:26:27,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:26:28,039 INFO L129 PetriNetUnfolder]: 171/584 cut-off events. [2022-01-19 07:26:28,040 INFO L130 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2022-01-19 07:26:28,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 584 events. 171/584 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3358 event pairs, 62 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1454. Up to 222 conditions per place. [2022-01-19 07:26:28,043 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 68 selfloop transitions, 24 changer transitions 6/139 dead transitions. [2022-01-19 07:26:28,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 769 flow [2022-01-19 07:26:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 07:26:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 07:26:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2022-01-19 07:26:28,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.73625 [2022-01-19 07:26:28,045 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2022-01-19 07:26:28,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2022-01-19 07:26:28,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:26:28,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2022-01-19 07:26:28,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 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 07:26:28,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 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 07:26:28,047 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 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 07:26:28,047 INFO L186 Difference]: Start difference. First operand has 104 places, 92 transitions, 368 flow. Second operand 10 states and 589 transitions. [2022-01-19 07:26:28,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 769 flow [2022-01-19 07:26:28,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 139 transitions, 721 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-01-19 07:26:28,051 INFO L242 Difference]: Finished difference. Result has 107 places, 100 transitions, 495 flow [2022-01-19 07:26:28,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=495, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2022-01-19 07:26:28,052 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-01-19 07:26:28,052 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 495 flow [2022-01-19 07:26:28,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 07:26:28,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:28,053 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] [2022-01-19 07:26:28,073 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 07:26:28,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:28,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash 852200369, now seen corresponding path program 3 times [2022-01-19 07:26:28,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:28,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800693982] [2022-01-19 07:26:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:28,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:28,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:28,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800693982] [2022-01-19 07:26:28,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800693982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:28,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288878680] [2022-01-19 07:26:28,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:26:28,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:28,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:26:28,356 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 07:26:28,358 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 07:26:28,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 07:26:28,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:26:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 07:26:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:26:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:28,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:26:28,838 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 07:26:28,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288878680] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:28,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 07:26:28,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 15 [2022-01-19 07:26:28,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825743910] [2022-01-19 07:26:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:26:28,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 07:26:28,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:26:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 07:26:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-19 07:26:28,840 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-01-19 07:26:28,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 495 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 07:26:28,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:26:28,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-01-19 07:26:28,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:26:29,167 INFO L129 PetriNetUnfolder]: 171/587 cut-off events. [2022-01-19 07:26:29,167 INFO L130 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2022-01-19 07:26:29,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1644 conditions, 587 events. 171/587 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3422 event pairs, 70 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 1624. Up to 290 conditions per place. [2022-01-19 07:26:29,171 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 63 selfloop transitions, 11 changer transitions 14/129 dead transitions. [2022-01-19 07:26:29,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 129 transitions, 800 flow [2022-01-19 07:26:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 07:26:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 07:26:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2022-01-19 07:26:29,173 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2022-01-19 07:26:29,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2022-01-19 07:26:29,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2022-01-19 07:26:29,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:26:29,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2022-01-19 07:26:29,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 07:26:29,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 07:26:29,175 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 07:26:29,175 INFO L186 Difference]: Start difference. First operand has 107 places, 100 transitions, 495 flow. Second operand 9 states and 520 transitions. [2022-01-19 07:26:29,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 129 transitions, 800 flow [2022-01-19 07:26:29,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 129 transitions, 762 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-01-19 07:26:29,180 INFO L242 Difference]: Finished difference. Result has 112 places, 100 transitions, 498 flow [2022-01-19 07:26:29,181 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2022-01-19 07:26:29,181 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2022-01-19 07:26:29,181 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 498 flow [2022-01-19 07:26:29,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 07:26:29,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:29,182 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] [2022-01-19 07:26:29,200 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 07:26:29,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:29,398 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1402773219, now seen corresponding path program 2 times [2022-01-19 07:26:29,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:29,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359217486] [2022-01-19 07:26:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:29,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:29,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:29,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359217486] [2022-01-19 07:26:29,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359217486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:29,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331635208] [2022-01-19 07:26:29,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 07:26:29,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:29,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:26:29,509 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 07:26:29,510 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 07:26:29,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:26:29,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:26:29,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 07:26:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:26:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:29,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:26:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:30,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331635208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:26:30,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:26:30,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-01-19 07:26:30,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821632547] [2022-01-19 07:26:30,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:26:30,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-19 07:26:30,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:26:30,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-19 07:26:30,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-19 07:26:30,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-01-19 07:26:30,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 100 transitions, 498 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 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 07:26:30,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:26:30,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-01-19 07:26:30,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:26:30,454 INFO L129 PetriNetUnfolder]: 86/442 cut-off events. [2022-01-19 07:26:30,454 INFO L130 PetriNetUnfolder]: For 721/755 co-relation queries the response was YES. [2022-01-19 07:26:30,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1130 conditions, 442 events. 86/442 cut-off events. For 721/755 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2395 event pairs, 11 based on Foata normal form. 21/453 useless extension candidates. Maximal degree in co-relation 1108. Up to 138 conditions per place. [2022-01-19 07:26:30,457 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 45 selfloop transitions, 41 changer transitions 12/154 dead transitions. [2022-01-19 07:26:30,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 154 transitions, 981 flow [2022-01-19 07:26:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 07:26:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 07:26:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2022-01-19 07:26:30,459 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2022-01-19 07:26:30,459 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2022-01-19 07:26:30,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2022-01-19 07:26:30,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:26:30,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2022-01-19 07:26:30,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 07:26:30,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 07:26:30,463 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 07:26:30,463 INFO L186 Difference]: Start difference. First operand has 112 places, 100 transitions, 498 flow. Second operand 17 states and 1026 transitions. [2022-01-19 07:26:30,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 154 transitions, 981 flow [2022-01-19 07:26:30,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 921 flow, removed 16 selfloop flow, removed 8 redundant places. [2022-01-19 07:26:30,468 INFO L242 Difference]: Finished difference. Result has 131 places, 121 transitions, 805 flow [2022-01-19 07:26:30,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=805, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2022-01-19 07:26:30,468 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 60 predicate places. [2022-01-19 07:26:30,468 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 805 flow [2022-01-19 07:26:30,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 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 07:26:30,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:30,469 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] [2022-01-19 07:26:30,491 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 07:26:30,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:30,686 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash -725373525, now seen corresponding path program 3 times [2022-01-19 07:26:30,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:30,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138251554] [2022-01-19 07:26:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:30,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:30,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:30,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138251554] [2022-01-19 07:26:30,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138251554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:30,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188209668] [2022-01-19 07:26:30,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:26:30,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:30,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:26:30,836 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 07:26:30,880 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 07:26:30,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 07:26:30,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:26:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 07:26:30,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:26:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:31,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:26:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:31,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188209668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:26:31,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:26:31,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-19 07:26:31,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697601764] [2022-01-19 07:26:31,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:26:31,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 07:26:31,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:26:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 07:26:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-01-19 07:26:31,398 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-01-19 07:26:31,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 805 flow. Second operand has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 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 07:26:31,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:26:31,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-01-19 07:26:31,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:26:31,630 INFO L129 PetriNetUnfolder]: 101/536 cut-off events. [2022-01-19 07:26:31,630 INFO L130 PetriNetUnfolder]: For 1320/1372 co-relation queries the response was YES. [2022-01-19 07:26:31,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 536 events. 101/536 cut-off events. For 1320/1372 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3179 event pairs, 14 based on Foata normal form. 25/552 useless extension candidates. Maximal degree in co-relation 1564. Up to 139 conditions per place. [2022-01-19 07:26:31,634 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 40 selfloop transitions, 61 changer transitions 9/166 dead transitions. [2022-01-19 07:26:31,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 166 transitions, 1359 flow [2022-01-19 07:26:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 07:26:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 07:26:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1077 transitions. [2022-01-19 07:26:31,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479166666666667 [2022-01-19 07:26:31,638 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1077 transitions. [2022-01-19 07:26:31,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1077 transitions. [2022-01-19 07:26:31,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:26:31,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1077 transitions. [2022-01-19 07:26:31,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.833333333333336) internal successors, (1077), 18 states have internal predecessors, (1077), 0 states have call successors, (0), 0 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 07:26:31,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 07:26:31,643 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 07:26:31,643 INFO L186 Difference]: Start difference. First operand has 131 places, 121 transitions, 805 flow. Second operand 18 states and 1077 transitions. [2022-01-19 07:26:31,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 166 transitions, 1359 flow [2022-01-19 07:26:31,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1312 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-01-19 07:26:31,653 INFO L242 Difference]: Finished difference. Result has 143 places, 143 transitions, 1157 flow [2022-01-19 07:26:31,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1157, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2022-01-19 07:26:31,654 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 72 predicate places. [2022-01-19 07:26:31,654 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 1157 flow [2022-01-19 07:26:31,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 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 07:26:31,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:26:31,654 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] [2022-01-19 07:26:31,679 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 07:26:31,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:31,872 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:26:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:26:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash -378455913, now seen corresponding path program 1 times [2022-01-19 07:26:31,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:26:31,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861873146] [2022-01-19 07:26:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:31,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:26:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:32,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:26:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861873146] [2022-01-19 07:26:32,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861873146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:26:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111408126] [2022-01-19 07:26:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:26:32,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:26:32,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:26:32,546 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 07:26:32,547 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 07:26:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:26:32,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:26:32,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:26:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:26:33,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:27:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:27:26,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111408126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:27:26,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:27:26,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 39 [2022-01-19 07:27:26,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4979042] [2022-01-19 07:27:26,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:27:26,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 07:27:26,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:27:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 07:27:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-01-19 07:27:26,067 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 07:27:26,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 143 transitions, 1157 flow. Second operand has 39 states, 39 states have (on average 48.666666666666664) internal successors, (1898), 39 states have internal predecessors, (1898), 0 states have call successors, (0), 0 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 07:27:26,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:27:26,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 07:27:26,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:27:31,032 INFO L129 PetriNetUnfolder]: 431/1402 cut-off events. [2022-01-19 07:27:31,033 INFO L130 PetriNetUnfolder]: For 4330/4330 co-relation queries the response was YES. [2022-01-19 07:27:31,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4854 conditions, 1402 events. 431/1402 cut-off events. For 4330/4330 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10650 event pairs, 44 based on Foata normal form. 1/1399 useless extension candidates. Maximal degree in co-relation 4818. Up to 329 conditions per place. [2022-01-19 07:27:31,041 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 129 selfloop transitions, 198 changer transitions 24/388 dead transitions. [2022-01-19 07:27:31,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 388 transitions, 3572 flow [2022-01-19 07:27:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 07:27:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 07:27:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2632 transitions. [2022-01-19 07:27:31,046 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6450980392156863 [2022-01-19 07:27:31,046 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2632 transitions. [2022-01-19 07:27:31,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2632 transitions. [2022-01-19 07:27:31,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:27:31,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2632 transitions. [2022-01-19 07:27:31,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 51.6078431372549) internal successors, (2632), 51 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:27:31,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 80.0) internal successors, (4160), 52 states have internal predecessors, (4160), 0 states have call successors, (0), 0 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 07:27:31,056 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 80.0) internal successors, (4160), 52 states have internal predecessors, (4160), 0 states have call successors, (0), 0 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 07:27:31,056 INFO L186 Difference]: Start difference. First operand has 143 places, 143 transitions, 1157 flow. Second operand 51 states and 2632 transitions. [2022-01-19 07:27:31,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 388 transitions, 3572 flow [2022-01-19 07:27:31,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 388 transitions, 3245 flow, removed 47 selfloop flow, removed 10 redundant places. [2022-01-19 07:27:31,074 INFO L242 Difference]: Finished difference. Result has 199 places, 278 transitions, 2731 flow [2022-01-19 07:27:31,075 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2731, PETRI_PLACES=199, PETRI_TRANSITIONS=278} [2022-01-19 07:27:31,075 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 128 predicate places. [2022-01-19 07:27:31,075 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 278 transitions, 2731 flow [2022-01-19 07:27:31,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 48.666666666666664) internal successors, (1898), 39 states have internal predecessors, (1898), 0 states have call successors, (0), 0 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 07:27:31,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:27:31,076 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] [2022-01-19 07:27:31,094 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 07:27:31,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:27:31,294 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:27:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:27:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash 904298003, now seen corresponding path program 2 times [2022-01-19 07:27:31,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:27:31,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103386777] [2022-01-19 07:27:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:27:31,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:27:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:27:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:27:31,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:27:31,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103386777] [2022-01-19 07:27:31,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103386777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:27:31,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202001124] [2022-01-19 07:27:31,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 07:27:31,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:27:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:27:31,806 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 07:27:31,806 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 07:27:31,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:27:31,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:27:31,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:27:31,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:27:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:27:32,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:28:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:28:20,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202001124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:28:20,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:28:20,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 37 [2022-01-19 07:28:20,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648441353] [2022-01-19 07:28:20,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:28:20,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 07:28:20,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:28:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 07:28:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 07:28:20,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 07:28:20,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 278 transitions, 2731 flow. Second operand has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 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 07:28:20,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:28:20,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 07:28:20,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:28:29,086 WARN L228 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 105 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 07:28:36,102 INFO L129 PetriNetUnfolder]: 477/1620 cut-off events. [2022-01-19 07:28:36,103 INFO L130 PetriNetUnfolder]: For 7123/7123 co-relation queries the response was YES. [2022-01-19 07:28:36,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6709 conditions, 1620 events. 477/1620 cut-off events. For 7123/7123 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13032 event pairs, 53 based on Foata normal form. 2/1616 useless extension candidates. Maximal degree in co-relation 6659. Up to 324 conditions per place. [2022-01-19 07:28:36,115 INFO L132 encePairwiseOnDemand]: 58/80 looper letters, 168 selfloop transitions, 262 changer transitions 35/502 dead transitions. [2022-01-19 07:28:36,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 502 transitions, 5571 flow [2022-01-19 07:28:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 07:28:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 07:28:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3526 transitions. [2022-01-19 07:28:36,130 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.638768115942029 [2022-01-19 07:28:36,131 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3526 transitions. [2022-01-19 07:28:36,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3526 transitions. [2022-01-19 07:28:36,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:28:36,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3526 transitions. [2022-01-19 07:28:36,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 51.10144927536232) internal successors, (3526), 69 states have internal predecessors, (3526), 0 states have call successors, (0), 0 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 07:28:36,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 80.0) internal successors, (5600), 70 states have internal predecessors, (5600), 0 states have call successors, (0), 0 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 07:28:36,144 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 80.0) internal successors, (5600), 70 states have internal predecessors, (5600), 0 states have call successors, (0), 0 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 07:28:36,144 INFO L186 Difference]: Start difference. First operand has 199 places, 278 transitions, 2731 flow. Second operand 69 states and 3526 transitions. [2022-01-19 07:28:36,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 502 transitions, 5571 flow [2022-01-19 07:28:36,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 502 transitions, 5374 flow, removed 84 selfloop flow, removed 9 redundant places. [2022-01-19 07:28:36,188 INFO L242 Difference]: Finished difference. Result has 285 places, 370 transitions, 4556 flow [2022-01-19 07:28:36,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=4556, PETRI_PLACES=285, PETRI_TRANSITIONS=370} [2022-01-19 07:28:36,189 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 214 predicate places. [2022-01-19 07:28:36,189 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 370 transitions, 4556 flow [2022-01-19 07:28:36,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 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 07:28:36,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:28:36,190 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] [2022-01-19 07:28:36,208 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 07:28:36,403 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,SelfDestructingSolverStorable9 [2022-01-19 07:28:36,403 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:28:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:28:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1238501907, now seen corresponding path program 3 times [2022-01-19 07:28:36,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:28:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878184397] [2022-01-19 07:28:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:28:36,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:28:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:28:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:28:36,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:28:36,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878184397] [2022-01-19 07:28:36,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878184397] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:28:36,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406049581] [2022-01-19 07:28:36,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:28:36,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:28:36,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:28:36,991 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 07:28:36,991 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 07:28:37,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 07:28:37,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:28:37,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:28:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:28:43,846 WARN L228 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 4489 DAG size of output: 2771 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-19 07:30:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:30:04,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:30:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:30:51,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406049581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:30:51,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:30:51,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 07:30:51,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315119797] [2022-01-19 07:30:51,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:30:51,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 07:30:51,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:30:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 07:30:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 07:30:51,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 07:30:51,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 370 transitions, 4556 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 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 07:30:51,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:30:51,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 07:30:51,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:31:06,920 INFO L129 PetriNetUnfolder]: 605/1921 cut-off events. [2022-01-19 07:31:06,920 INFO L130 PetriNetUnfolder]: For 15619/15619 co-relation queries the response was YES. [2022-01-19 07:31:06,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9966 conditions, 1921 events. 605/1921 cut-off events. For 15619/15619 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15691 event pairs, 43 based on Foata normal form. 1/1918 useless extension candidates. Maximal degree in co-relation 9889. Up to 418 conditions per place. [2022-01-19 07:31:06,949 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 160 selfloop transitions, 408 changer transitions 25/630 dead transitions. [2022-01-19 07:31:06,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 630 transitions, 8607 flow [2022-01-19 07:31:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-19 07:31:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-01-19 07:31:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 4984 transitions. [2022-01-19 07:31:06,956 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2022-01-19 07:31:06,956 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 4984 transitions. [2022-01-19 07:31:06,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 4984 transitions. [2022-01-19 07:31:06,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:31:06,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 4984 transitions. [2022-01-19 07:31:06,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 50.857142857142854) internal successors, (4984), 98 states have internal predecessors, (4984), 0 states have call successors, (0), 0 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 07:31:06,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 80.0) internal successors, (7920), 99 states have internal predecessors, (7920), 0 states have call successors, (0), 0 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 07:31:06,975 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 80.0) internal successors, (7920), 99 states have internal predecessors, (7920), 0 states have call successors, (0), 0 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 07:31:06,975 INFO L186 Difference]: Start difference. First operand has 285 places, 370 transitions, 4556 flow. Second operand 98 states and 4984 transitions. [2022-01-19 07:31:06,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 630 transitions, 8607 flow [2022-01-19 07:31:07,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 630 transitions, 7918 flow, removed 183 selfloop flow, removed 27 redundant places. [2022-01-19 07:31:07,103 INFO L242 Difference]: Finished difference. Result has 367 places, 501 transitions, 6671 flow [2022-01-19 07:31:07,103 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=6671, PETRI_PLACES=367, PETRI_TRANSITIONS=501} [2022-01-19 07:31:07,104 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 296 predicate places. [2022-01-19 07:31:07,104 INFO L470 AbstractCegarLoop]: Abstraction has has 367 places, 501 transitions, 6671 flow [2022-01-19 07:31:07,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 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 07:31:07,105 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:31:07,105 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] [2022-01-19 07:31:07,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 07:31:07,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:31:07,316 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:31:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:31:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1183008459, now seen corresponding path program 4 times [2022-01-19 07:31:07,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:31:07,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898715403] [2022-01-19 07:31:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:31:07,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:31:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:31:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:31:07,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:31:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898715403] [2022-01-19 07:31:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898715403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:31:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304512714] [2022-01-19 07:31:07,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 07:31:07,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:31:07,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:31:07,959 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 07:31:07,966 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 07:31:08,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 07:31:08,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:31:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:31:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:31:14,896 WARN L228 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 4489 DAG size of output: 2771 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-19 07:32:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:32:43,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:33:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:33:42,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304512714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:33:42,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:33:42,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 07:33:42,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488696184] [2022-01-19 07:33:42,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:33:42,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 07:33:42,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:33:42,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 07:33:42,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 07:33:42,546 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 07:33:42,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 501 transitions, 6671 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 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 07:33:42,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:33:42,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 07:33:42,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:34:08,061 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:34:09,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:34:11,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:34:22,908 INFO L129 PetriNetUnfolder]: 912/2842 cut-off events. [2022-01-19 07:34:22,908 INFO L130 PetriNetUnfolder]: For 36143/36143 co-relation queries the response was YES. [2022-01-19 07:34:22,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17115 conditions, 2842 events. 912/2842 cut-off events. For 36143/36143 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24872 event pairs, 40 based on Foata normal form. 3/2842 useless extension candidates. Maximal degree in co-relation 17026. Up to 482 conditions per place. [2022-01-19 07:34:22,941 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 270 selfloop transitions, 780 changer transitions 35/1122 dead transitions. [2022-01-19 07:34:22,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1122 transitions, 17665 flow [2022-01-19 07:34:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-01-19 07:34:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2022-01-19 07:34:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 8847 transitions. [2022-01-19 07:34:22,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392341040462428 [2022-01-19 07:34:22,955 INFO L72 ComplementDD]: Start complementDD. Operand 173 states and 8847 transitions. [2022-01-19 07:34:22,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 173 states and 8847 transitions. [2022-01-19 07:34:22,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:34:22,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 173 states and 8847 transitions. [2022-01-19 07:34:22,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 174 states, 173 states have (on average 51.138728323699425) internal successors, (8847), 173 states have internal predecessors, (8847), 0 states have call successors, (0), 0 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 07:34:22,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 174 states, 174 states have (on average 80.0) internal successors, (13920), 174 states have internal predecessors, (13920), 0 states have call successors, (0), 0 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 07:34:22,983 INFO L81 ComplementDD]: Finished complementDD. Result has 174 states, 174 states have (on average 80.0) internal successors, (13920), 174 states have internal predecessors, (13920), 0 states have call successors, (0), 0 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 07:34:22,983 INFO L186 Difference]: Start difference. First operand has 367 places, 501 transitions, 6671 flow. Second operand 173 states and 8847 transitions. [2022-01-19 07:34:22,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1122 transitions, 17665 flow [2022-01-19 07:34:23,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1122 transitions, 16159 flow, removed 375 selfloop flow, removed 42 redundant places. [2022-01-19 07:34:23,164 INFO L242 Difference]: Finished difference. Result has 536 places, 893 transitions, 14220 flow [2022-01-19 07:34:23,165 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=173, PETRI_FLOW=14220, PETRI_PLACES=536, PETRI_TRANSITIONS=893} [2022-01-19 07:34:23,165 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 465 predicate places. [2022-01-19 07:34:23,165 INFO L470 AbstractCegarLoop]: Abstraction has has 536 places, 893 transitions, 14220 flow [2022-01-19 07:34:23,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 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 07:34:23,166 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:34:23,166 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] [2022-01-19 07:34:23,181 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 07:34:23,367 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,SelfDestructingSolverStorable11 [2022-01-19 07:34:23,367 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:34:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:34:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash 458985453, now seen corresponding path program 5 times [2022-01-19 07:34:23,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:34:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263837879] [2022-01-19 07:34:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:34:23,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:34:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:34:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:34:23,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:34:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263837879] [2022-01-19 07:34:23,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263837879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:34:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910983603] [2022-01-19 07:34:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 07:34:23,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:34:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:34:23,921 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 07:34:23,922 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 07:34:23,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:34:23,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:34:23,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:34:23,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:34:30,701 WARN L228 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 4489 DAG size of output: 2771 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-19 07:36:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:36:02,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:36:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:36:53,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910983603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:36:53,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:36:53,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 07:36:53,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577968582] [2022-01-19 07:36:53,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:36:53,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 07:36:53,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:36:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 07:36:53,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 07:36:53,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 07:36:53,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 893 transitions, 14220 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 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 07:36:53,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:36:53,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 07:36:53,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:02,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:37:04,253 INFO L129 PetriNetUnfolder]: 906/2772 cut-off events. [2022-01-19 07:37:04,253 INFO L130 PetriNetUnfolder]: For 55095/55095 co-relation queries the response was YES. [2022-01-19 07:37:04,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19609 conditions, 2772 events. 906/2772 cut-off events. For 55095/55095 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 24097 event pairs, 63 based on Foata normal form. 1/2768 useless extension candidates. Maximal degree in co-relation 19484. Up to 890 conditions per place. [2022-01-19 07:37:04,293 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 349 selfloop transitions, 603 changer transitions 10/999 dead transitions. [2022-01-19 07:37:04,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 999 transitions, 17631 flow [2022-01-19 07:37:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 07:37:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 07:37:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3820 transitions. [2022-01-19 07:37:04,296 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2022-01-19 07:37:04,296 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3820 transitions. [2022-01-19 07:37:04,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3820 transitions. [2022-01-19 07:37:04,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:04,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3820 transitions. [2022-01-19 07:37:04,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 50.93333333333333) internal successors, (3820), 75 states have internal predecessors, (3820), 0 states have call successors, (0), 0 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 07:37:04,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 80.0) internal successors, (6080), 76 states have internal predecessors, (6080), 0 states have call successors, (0), 0 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 07:37:04,306 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 80.0) internal successors, (6080), 76 states have internal predecessors, (6080), 0 states have call successors, (0), 0 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 07:37:04,306 INFO L186 Difference]: Start difference. First operand has 536 places, 893 transitions, 14220 flow. Second operand 75 states and 3820 transitions. [2022-01-19 07:37:04,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 999 transitions, 17631 flow [2022-01-19 07:37:04,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 999 transitions, 14822 flow, removed 1149 selfloop flow, removed 71 redundant places. [2022-01-19 07:37:04,775 INFO L242 Difference]: Finished difference. Result has 534 places, 901 transitions, 13121 flow [2022-01-19 07:37:04,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=11772, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=13121, PETRI_PLACES=534, PETRI_TRANSITIONS=901} [2022-01-19 07:37:04,776 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 463 predicate places. [2022-01-19 07:37:04,776 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 901 transitions, 13121 flow [2022-01-19 07:37:04,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 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 07:37:04,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:04,777 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] [2022-01-19 07:37:04,795 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 07:37:04,991 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,SelfDestructingSolverStorable12 [2022-01-19 07:37:04,991 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1766559223, now seen corresponding path program 6 times [2022-01-19 07:37:04,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:04,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117911890] [2022-01-19 07:37:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:04,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:05,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117911890] [2022-01-19 07:37:05,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117911890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313200473] [2022-01-19 07:37:05,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 07:37:05,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:05,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:05,595 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 07:37:05,597 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 07:37:05,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 07:37:05,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:05,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:37:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:06,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:53,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313200473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:53,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:53,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 07:37:53,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332587871] [2022-01-19 07:37:53,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:53,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 07:37:53,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 07:37:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 07:37:53,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 07:37:53,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 901 transitions, 13121 flow. Second operand has 38 states, 38 states have (on average 48.6578947368421) internal successors, (1849), 38 states have internal predecessors, (1849), 0 states have call successors, (0), 0 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 07:37:53,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:53,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 07:37:53,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:38:13,985 INFO L129 PetriNetUnfolder]: 1083/3205 cut-off events. [2022-01-19 07:38:13,985 INFO L130 PetriNetUnfolder]: For 54396/54396 co-relation queries the response was YES. [2022-01-19 07:38:14,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21304 conditions, 3205 events. 1083/3205 cut-off events. For 54396/54396 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28246 event pairs, 48 based on Foata normal form. 4/3205 useless extension candidates. Maximal degree in co-relation 21196. Up to 607 conditions per place. [2022-01-19 07:38:14,030 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 322 selfloop transitions, 910 changer transitions 28/1297 dead transitions. [2022-01-19 07:38:14,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1297 transitions, 21735 flow [2022-01-19 07:38:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-19 07:38:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2022-01-19 07:38:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 6368 transitions. [2022-01-19 07:38:14,034 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6419354838709678 [2022-01-19 07:38:14,034 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 6368 transitions. [2022-01-19 07:38:14,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 6368 transitions. [2022-01-19 07:38:14,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:38:14,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 6368 transitions. [2022-01-19 07:38:14,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 51.354838709677416) internal successors, (6368), 124 states have internal predecessors, (6368), 0 states have call successors, (0), 0 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 07:38:14,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 80.0) internal successors, (10000), 125 states have internal predecessors, (10000), 0 states have call successors, (0), 0 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 07:38:14,052 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 80.0) internal successors, (10000), 125 states have internal predecessors, (10000), 0 states have call successors, (0), 0 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 07:38:14,052 INFO L186 Difference]: Start difference. First operand has 534 places, 901 transitions, 13121 flow. Second operand 124 states and 6368 transitions. [2022-01-19 07:38:14,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1297 transitions, 21735 flow [2022-01-19 07:38:14,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1297 transitions, 20927 flow, removed 147 selfloop flow, removed 57 redundant places. [2022-01-19 07:38:14,503 INFO L242 Difference]: Finished difference. Result has 631 places, 1108 transitions, 18789 flow [2022-01-19 07:38:14,504 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=12615, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=18789, PETRI_PLACES=631, PETRI_TRANSITIONS=1108} [2022-01-19 07:38:14,504 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 560 predicate places. [2022-01-19 07:38:14,504 INFO L470 AbstractCegarLoop]: Abstraction has has 631 places, 1108 transitions, 18789 flow [2022-01-19 07:38:14,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.6578947368421) internal successors, (1849), 38 states have internal predecessors, (1849), 0 states have call successors, (0), 0 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 07:38:14,505 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:38:14,505 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] [2022-01-19 07:38:14,521 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 07:38:14,705 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,SelfDestructingSolverStorable13 [2022-01-19 07:38:14,705 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:38:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:38:14,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2053780671, now seen corresponding path program 7 times [2022-01-19 07:38:14,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:38:14,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908078945] [2022-01-19 07:38:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:38:14,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:38:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:38:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:38:15,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:38:15,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908078945] [2022-01-19 07:38:15,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908078945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:38:15,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687536430] [2022-01-19 07:38:15,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 07:38:15,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:38:15,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:38:15,277 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 07:38:15,278 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 07:38:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:38:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:38:15,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:38:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:38:16,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:39:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:39:04,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687536430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:39:04,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:39:04,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 07:39:04,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215223326] [2022-01-19 07:39:04,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:39:04,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 07:39:04,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:39:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 07:39:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 07:39:04,023 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 07:39:04,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 1108 transitions, 18789 flow. Second operand has 38 states, 38 states have (on average 48.6578947368421) internal successors, (1849), 38 states have internal predecessors, (1849), 0 states have call successors, (0), 0 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 07:39:04,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:39:04,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 07:39:04,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:39:17,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:39:23,619 INFO L129 PetriNetUnfolder]: 1286/3905 cut-off events. [2022-01-19 07:39:23,619 INFO L130 PetriNetUnfolder]: For 79822/79822 co-relation queries the response was YES. [2022-01-19 07:39:23,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28825 conditions, 3905 events. 1286/3905 cut-off events. For 79822/79822 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36300 event pairs, 123 based on Foata normal form. 2/3891 useless extension candidates. Maximal degree in co-relation 28687. Up to 1567 conditions per place. [2022-01-19 07:39:23,684 INFO L132 encePairwiseOnDemand]: 58/80 looper letters, 588 selfloop transitions, 928 changer transitions 14/1567 dead transitions. [2022-01-19 07:39:23,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 1567 transitions, 30260 flow [2022-01-19 07:39:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-19 07:39:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-01-19 07:39:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4107 transitions. [2022-01-19 07:39:23,688 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6337962962962963 [2022-01-19 07:39:23,688 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4107 transitions. [2022-01-19 07:39:23,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4107 transitions. [2022-01-19 07:39:23,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:39:23,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4107 transitions. [2022-01-19 07:39:23,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 50.7037037037037) internal successors, (4107), 81 states have internal predecessors, (4107), 0 states have call successors, (0), 0 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 07:39:23,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 80.0) internal successors, (6560), 82 states have internal predecessors, (6560), 0 states have call successors, (0), 0 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 07:39:23,698 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 80.0) internal successors, (6560), 82 states have internal predecessors, (6560), 0 states have call successors, (0), 0 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 07:39:23,698 INFO L186 Difference]: Start difference. First operand has 631 places, 1108 transitions, 18789 flow. Second operand 81 states and 4107 transitions. [2022-01-19 07:39:23,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 1567 transitions, 30260 flow [2022-01-19 07:39:24,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1567 transitions, 29289 flow, removed 342 selfloop flow, removed 49 redundant places. [2022-01-19 07:39:24,676 INFO L242 Difference]: Finished difference. Result has 675 places, 1419 transitions, 28215 flow [2022-01-19 07:39:24,677 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=18204, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=639, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=28215, PETRI_PLACES=675, PETRI_TRANSITIONS=1419} [2022-01-19 07:39:24,677 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 604 predicate places. [2022-01-19 07:39:24,677 INFO L470 AbstractCegarLoop]: Abstraction has has 675 places, 1419 transitions, 28215 flow [2022-01-19 07:39:24,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.6578947368421) internal successors, (1849), 38 states have internal predecessors, (1849), 0 states have call successors, (0), 0 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 07:39:24,678 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:39:24,678 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] [2022-01-19 07:39:24,693 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 07:39:24,878 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,SelfDestructingSolverStorable14 [2022-01-19 07:39:24,879 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:39:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:39:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 801374009, now seen corresponding path program 8 times [2022-01-19 07:39:24,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:39:24,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662031801] [2022-01-19 07:39:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:39:24,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:39:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:39:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:39:25,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:39:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662031801] [2022-01-19 07:39:25,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662031801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:39:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040435953] [2022-01-19 07:39:25,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 07:39:25,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:39:25,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:39:25,468 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 07:39:25,469 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 07:39:25,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:39:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:39:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:39:25,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:39:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:39:26,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:40:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:40:15,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040435953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:40:15,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:40:15,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 07:40:15,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733176845] [2022-01-19 07:40:15,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:40:15,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 07:40:15,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:40:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 07:40:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 07:40:15,470 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 07:40:15,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1419 transitions, 28215 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 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 07:40:15,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:40:15,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 07:40:15,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:40:28,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:40:33,988 INFO L129 PetriNetUnfolder]: 1371/4230 cut-off events. [2022-01-19 07:40:33,988 INFO L130 PetriNetUnfolder]: For 97356/97356 co-relation queries the response was YES. [2022-01-19 07:40:34,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33117 conditions, 4230 events. 1371/4230 cut-off events. For 97356/97356 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 40517 event pairs, 123 based on Foata normal form. 2/4216 useless extension candidates. Maximal degree in co-relation 32963. Up to 1629 conditions per place. [2022-01-19 07:40:34,051 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 574 selfloop transitions, 1040 changer transitions 15/1666 dead transitions. [2022-01-19 07:40:34,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 1666 transitions, 35684 flow [2022-01-19 07:40:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-19 07:40:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-01-19 07:40:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 4901 transitions. [2022-01-19 07:40:34,055 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6315721649484536 [2022-01-19 07:40:34,055 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 4901 transitions. [2022-01-19 07:40:34,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 4901 transitions. [2022-01-19 07:40:34,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:40:34,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 4901 transitions. [2022-01-19 07:40:34,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 50.52577319587629) internal successors, (4901), 97 states have internal predecessors, (4901), 0 states have call successors, (0), 0 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 07:40:34,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 80.0) internal successors, (7840), 98 states have internal predecessors, (7840), 0 states have call successors, (0), 0 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 07:40:34,065 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 80.0) internal successors, (7840), 98 states have internal predecessors, (7840), 0 states have call successors, (0), 0 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 07:40:34,065 INFO L186 Difference]: Start difference. First operand has 675 places, 1419 transitions, 28215 flow. Second operand 97 states and 4901 transitions. [2022-01-19 07:40:34,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 1666 transitions, 35684 flow [2022-01-19 07:40:35,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 1666 transitions, 33291 flow, removed 1081 selfloop flow, removed 32 redundant places. [2022-01-19 07:40:35,318 INFO L242 Difference]: Finished difference. Result has 751 places, 1538 transitions, 31370 flow [2022-01-19 07:40:35,319 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=26694, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=936, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=31370, PETRI_PLACES=751, PETRI_TRANSITIONS=1538} [2022-01-19 07:40:35,319 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 680 predicate places. [2022-01-19 07:40:35,319 INFO L470 AbstractCegarLoop]: Abstraction has has 751 places, 1538 transitions, 31370 flow [2022-01-19 07:40:35,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 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 07:40:35,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:40:35,320 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] [2022-01-19 07:40:35,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-19 07:40:35,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:40:35,530 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:40:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:40:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash -454754667, now seen corresponding path program 9 times [2022-01-19 07:40:35,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:40:35,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457039690] [2022-01-19 07:40:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:40:35,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:40:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:40:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:40:36,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:40:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457039690] [2022-01-19 07:40:36,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457039690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:40:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416350903] [2022-01-19 07:40:36,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:40:36,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:40:36,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:40:36,111 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 07:40:36,112 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 07:40:36,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 07:40:36,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:40:36,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 07:40:36,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:40:43,045 WARN L228 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 4489 DAG size of output: 2771 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2022-01-19 07:40:43,884 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-19 07:40:43,885 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 07:40:43,904 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 07:40:43,906 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 07:40:43,909 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 07:40:44,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 07:40:44,086 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 66 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 14 for 27ms.. [2022-01-19 07:40:44,088 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 07:40:44,088 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 07:40:44,090 INFO L732 BasicCegarLoop]: Path program histogram: [9, 3, 3, 1, 1] [2022-01-19 07:40:44,091 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 07:40:44,091 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 07:40:44,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 07:40:44 BasicIcfg [2022-01-19 07:40:44,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 07:40:44,094 INFO L158 Benchmark]: Toolchain (without parser) took 861659.25ms. Allocated memory was 341.8MB in the beginning and 1.1GB in the end (delta: 744.5MB). Free memory was 289.3MB in the beginning and 301.5MB in the end (delta: -12.1MB). Peak memory consumption was 853.3MB. Max. memory is 16.0GB. [2022-01-19 07:40:44,095 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory is still 305.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 07:40:44,095 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.78ms. Allocated memory is still 341.8MB. Free memory was 289.2MB in the beginning and 315.5MB in the end (delta: -26.4MB). Peak memory consumption was 17.2MB. Max. memory is 16.0GB. [2022-01-19 07:40:44,095 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.49ms. Allocated memory is still 341.8MB. Free memory was 315.0MB in the beginning and 313.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 07:40:44,095 INFO L158 Benchmark]: Boogie Preprocessor took 27.44ms. Allocated memory is still 341.8MB. Free memory was 313.6MB in the beginning and 312.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 07:40:44,095 INFO L158 Benchmark]: RCFGBuilder took 287.00ms. Allocated memory is still 341.8MB. Free memory was 312.5MB in the beginning and 301.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-19 07:40:44,095 INFO L158 Benchmark]: TraceAbstraction took 861114.51ms. Allocated memory was 341.8MB in the beginning and 1.1GB in the end (delta: 744.5MB). Free memory was 301.0MB in the beginning and 301.5MB in the end (delta: -417.2kB). Peak memory consumption was 865.5MB. Max. memory is 16.0GB. [2022-01-19 07:40:44,097 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory is still 305.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 194.78ms. Allocated memory is still 341.8MB. Free memory was 289.2MB in the beginning and 315.5MB in the end (delta: -26.4MB). Peak memory consumption was 17.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.49ms. Allocated memory is still 341.8MB. Free memory was 315.0MB in the beginning and 313.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 27.44ms. Allocated memory is still 341.8MB. Free memory was 313.6MB in the beginning and 312.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 287.00ms. Allocated memory is still 341.8MB. Free memory was 312.5MB in the beginning and 301.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 861114.51ms. Allocated memory was 341.8MB in the beginning and 1.1GB in the end (delta: 744.5MB). Free memory was 301.0MB in the beginning and 301.5MB in the end (delta: -417.2kB). Peak memory consumption was 865.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 66 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 14 for 27ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 66 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 14 for 27ms.. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 66 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 14 for 27ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 96 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 861.0s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 151.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 4461 SdHoareTripleChecker+Valid, 54.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4461 mSDsluCounter, 6135 SdHoareTripleChecker+Invalid, 50.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8605 mSDsCounter, 1425 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17951 IncrementalHoareTripleChecker+Invalid, 19379 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1425 mSolverCounterUnsat, 535 mSDtfsCounter, 17951 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2618 GetRequests, 1513 SyntacticMatches, 55 SemanticMatches, 1050 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41824 ImplicationChecksByTransitivity, 108.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31370occurred in iteration=16, InterpolantAutomatonStates: 861, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 696.4s InterpolantComputationTime, 1870 NumberOfCodeBlocks, 1870 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 2706 ConstructedInterpolants, 0 QuantifiedInterpolants, 49109 SizeOfPredicates, 150 NumberOfNonLiveVariables, 2066 ConjunctsInSsa, 327 ConjunctsInUnsatCore, 44 InterpolantComputations, 4 PerfectInterpolantSequences, 2/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown