/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-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 13:37:16,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 13:37:16,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 13:37:16,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 13:37:16,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 13:37:16,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 13:37:16,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 13:37:16,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 13:37:16,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 13:37:16,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 13:37:16,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 13:37:16,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 13:37:16,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 13:37:16,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 13:37:16,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 13:37:16,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 13:37:16,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 13:37:16,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 13:37:16,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 13:37:16,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 13:37:16,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 13:37:16,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 13:37:16,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 13:37:16,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 13:37:16,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 13:37:16,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 13:37:16,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 13:37:16,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 13:37:16,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 13:37:16,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 13:37:16,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 13:37:16,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 13:37:16,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 13:37:16,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 13:37:16,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 13:37:16,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 13:37:16,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 13:37:16,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 13:37:16,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 13:37:16,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 13:37:16,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 13:37:16,805 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-After.epf [2022-01-19 13:37:16,817 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 13:37:16,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 13:37:16,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 13:37:16,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 13:37:16,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 13:37:16,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 13:37:16,819 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 13:37:16,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 13:37:16,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 13:37:16,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 13:37:16,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 13:37:16,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 13:37:16,821 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 13:37:16,821 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 13:37:16,821 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 13:37:16,821 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 13:37:17,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 13:37:17,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 13:37:17,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 13:37:17,026 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 13:37:17,026 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 13:37:17,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2022-01-19 13:37:17,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9548c82d1/ba32d01231a843bfb2bfe0fbaed60ee2/FLAG2e145c02a [2022-01-19 13:37:17,352 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 13:37:17,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2022-01-19 13:37:17,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9548c82d1/ba32d01231a843bfb2bfe0fbaed60ee2/FLAG2e145c02a [2022-01-19 13:37:17,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9548c82d1/ba32d01231a843bfb2bfe0fbaed60ee2 [2022-01-19 13:37:17,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 13:37:17,800 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 13:37:17,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 13:37:17,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 13:37:17,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 13:37:17,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:37:17" (1/1) ... [2022-01-19 13:37:17,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ce485e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:17, skipping insertion in model container [2022-01-19 13:37:17,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:37:17" (1/1) ... [2022-01-19 13:37:17,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 13:37:17,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 13:37:18,029 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/parallel-misc-3-extended.wvr.c[2856,2869] [2022-01-19 13:37:18,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 13:37:18,042 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 13:37:18,073 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/parallel-misc-3-extended.wvr.c[2856,2869] [2022-01-19 13:37:18,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 13:37:18,082 INFO L208 MainTranslator]: Completed translation [2022-01-19 13:37:18,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18 WrapperNode [2022-01-19 13:37:18,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 13:37:18,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 13:37:18,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 13:37:18,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 13:37:18,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,119 INFO L137 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-01-19 13:37:18,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 13:37:18,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 13:37:18,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 13:37:18,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 13:37:18,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 13:37:18,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 13:37:18,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 13:37:18,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 13:37:18,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (1/1) ... [2022-01-19 13:37:18,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 13:37:18,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:37:18,183 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 13:37:18,186 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 13:37:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 13:37:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 13:37:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 13:37:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 13:37:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 13:37:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-19 13:37:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-19 13:37:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 13:37:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 13:37:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 13:37:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 13:37:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 13:37:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 13:37:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 13:37:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 13:37:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 13:37:18,209 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 13:37:18,258 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 13:37:18,259 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 13:37:18,390 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 13:37:18,404 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 13:37:18,404 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 13:37:18,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:37:18 BoogieIcfgContainer [2022-01-19 13:37:18,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 13:37:18,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 13:37:18,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 13:37:18,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 13:37:18,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 01:37:17" (1/3) ... [2022-01-19 13:37:18,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e93f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:37:18, skipping insertion in model container [2022-01-19 13:37:18,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:37:18" (2/3) ... [2022-01-19 13:37:18,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e93f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:37:18, skipping insertion in model container [2022-01-19 13:37:18,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:37:18" (3/3) ... [2022-01-19 13:37:18,410 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2022-01-19 13:37:18,413 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 13:37:18,414 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 13:37:18,414 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 13:37:18,463 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,463 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,463 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,464 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,464 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,464 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,464 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,465 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,465 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,467 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,467 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,467 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,468 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,468 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,469 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,469 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,469 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,470 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,470 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,470 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,480 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,481 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,482 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,482 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,487 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,487 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,489 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,489 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,489 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,489 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,489 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,490 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,490 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,490 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,492 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,492 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,492 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,492 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,492 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,494 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,494 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,494 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:37:18,497 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-19 13:37:18,539 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 13:37:18,544 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 13:37:18,544 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-19 13:37:18,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 282 flow [2022-01-19 13:37:18,584 INFO L129 PetriNetUnfolder]: 16/126 cut-off events. [2022-01-19 13:37:18,584 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 13:37:18,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 126 events. 16/126 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 130 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-01-19 13:37:18,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 129 transitions, 282 flow [2022-01-19 13:37:18,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 115 transitions, 248 flow [2022-01-19 13:37:18,611 INFO L129 PetriNetUnfolder]: 16/114 cut-off events. [2022-01-19 13:37:18,611 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 13:37:18,611 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:18,612 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:18,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:18,615 INFO L85 PathProgramCache]: Analyzing trace with hash -620095962, now seen corresponding path program 1 times [2022-01-19 13:37:18,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:18,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522611199] [2022-01-19 13:37:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:18,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:18,782 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 13:37:18,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:18,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522611199] [2022-01-19 13:37:18,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522611199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:18,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:18,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 13:37:18,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567732901] [2022-01-19 13:37:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:18,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 13:37:18,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 13:37:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 13:37:18,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 129 [2022-01-19 13:37:18,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 248 flow. Second operand has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:18,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:18,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 129 [2022-01-19 13:37:18,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:18,890 INFO L129 PetriNetUnfolder]: 22/133 cut-off events. [2022-01-19 13:37:18,893 INFO L130 PetriNetUnfolder]: For 15/16 co-relation queries the response was YES. [2022-01-19 13:37:18,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 133 events. 22/133 cut-off events. For 15/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 211 event pairs, 2 based on Foata normal form. 13/127 useless extension candidates. Maximal degree in co-relation 103. Up to 15 conditions per place. [2022-01-19 13:37:18,898 INFO L132 encePairwiseOnDemand]: 125/129 looper letters, 8 selfloop transitions, 0 changer transitions 1/111 dead transitions. [2022-01-19 13:37:18,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 111 transitions, 256 flow [2022-01-19 13:37:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 13:37:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 13:37:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 244 transitions. [2022-01-19 13:37:18,909 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9457364341085271 [2022-01-19 13:37:18,909 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 244 transitions. [2022-01-19 13:37:18,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 244 transitions. [2022-01-19 13:37:18,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:18,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 244 transitions. [2022-01-19 13:37:18,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 122.0) internal successors, (244), 2 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:18,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:18,921 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:18,922 INFO L186 Difference]: Start difference. First operand has 109 places, 115 transitions, 248 flow. Second operand 2 states and 244 transitions. [2022-01-19 13:37:18,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 111 transitions, 256 flow [2022-01-19 13:37:18,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 111 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 13:37:18,931 INFO L242 Difference]: Finished difference. Result has 104 places, 110 transitions, 226 flow [2022-01-19 13:37:18,933 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=226, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2022-01-19 13:37:18,935 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, -5 predicate places. [2022-01-19 13:37:18,936 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 226 flow [2022-01-19 13:37:18,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:18,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:18,936 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:18,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 13:37:18,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2011730583, now seen corresponding path program 1 times [2022-01-19 13:37:18,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:18,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600149445] [2022-01-19 13:37:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:18,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:19,009 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 13:37:19,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:19,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600149445] [2022-01-19 13:37:19,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600149445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:19,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:19,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:37:19,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430041804] [2022-01-19 13:37:19,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:19,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:37:19,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:37:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:37:19,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 13:37:19,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:19,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 13:37:19,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:19,065 INFO L129 PetriNetUnfolder]: 41/193 cut-off events. [2022-01-19 13:37:19,066 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 13:37:19,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 193 events. 41/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 544 event pairs, 4 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 255. Up to 31 conditions per place. [2022-01-19 13:37:19,069 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 17 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2022-01-19 13:37:19,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 278 flow [2022-01-19 13:37:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:37:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:37:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-01-19 13:37:19,073 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9121447028423773 [2022-01-19 13:37:19,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:19,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,077 INFO L186 Difference]: Start difference. First operand has 104 places, 110 transitions, 226 flow. Second operand 3 states and 353 transitions. [2022-01-19 13:37:19,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 278 flow [2022-01-19 13:37:19,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 116 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 13:37:19,080 INFO L242 Difference]: Finished difference. Result has 106 places, 111 transitions, 238 flow [2022-01-19 13:37:19,080 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2022-01-19 13:37:19,081 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, -3 predicate places. [2022-01-19 13:37:19,081 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 238 flow [2022-01-19 13:37:19,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:19,082 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:19,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 13:37:19,082 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash 464963149, now seen corresponding path program 1 times [2022-01-19 13:37:19,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:19,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327234499] [2022-01-19 13:37:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:19,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:19,212 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 13:37:19,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:19,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327234499] [2022-01-19 13:37:19,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327234499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:19,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:19,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:37:19,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384084120] [2022-01-19 13:37:19,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:19,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:37:19,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:37:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:37:19,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 13:37:19,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:19,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 13:37:19,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:19,264 INFO L129 PetriNetUnfolder]: 55/217 cut-off events. [2022-01-19 13:37:19,264 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-01-19 13:37:19,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 217 events. 55/217 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 807 event pairs, 4 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 344. Up to 72 conditions per place. [2022-01-19 13:37:19,266 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 18 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2022-01-19 13:37:19,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 116 transitions, 290 flow [2022-01-19 13:37:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:37:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:37:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2022-01-19 13:37:19,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8992248062015504 [2022-01-19 13:37:19,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2022-01-19 13:37:19,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2022-01-19 13:37:19,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:19,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2022-01-19 13:37:19,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,271 INFO L186 Difference]: Start difference. First operand has 106 places, 111 transitions, 238 flow. Second operand 3 states and 348 transitions. [2022-01-19 13:37:19,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 116 transitions, 290 flow [2022-01-19 13:37:19,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 116 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 13:37:19,276 INFO L242 Difference]: Finished difference. Result has 108 places, 112 transitions, 248 flow [2022-01-19 13:37:19,276 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=108, PETRI_TRANSITIONS=112} [2022-01-19 13:37:19,276 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, -1 predicate places. [2022-01-19 13:37:19,276 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 112 transitions, 248 flow [2022-01-19 13:37:19,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,277 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:19,277 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:19,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 13:37:19,277 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash -618881529, now seen corresponding path program 1 times [2022-01-19 13:37:19,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:19,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288388134] [2022-01-19 13:37:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:19,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:37:19,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:19,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288388134] [2022-01-19 13:37:19,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288388134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:19,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:19,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:37:19,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560834806] [2022-01-19 13:37:19,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:19,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:37:19,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:37:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:37:19,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 13:37:19,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 112 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:19,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 13:37:19,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:19,377 INFO L129 PetriNetUnfolder]: 154/500 cut-off events. [2022-01-19 13:37:19,377 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 13:37:19,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 500 events. 154/500 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2355 event pairs, 17 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 688. Up to 85 conditions per place. [2022-01-19 13:37:19,383 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 17 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2022-01-19 13:37:19,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 118 transitions, 300 flow [2022-01-19 13:37:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:37:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:37:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-01-19 13:37:19,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9121447028423773 [2022-01-19 13:37:19,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:19,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,386 INFO L186 Difference]: Start difference. First operand has 108 places, 112 transitions, 248 flow. Second operand 3 states and 353 transitions. [2022-01-19 13:37:19,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 118 transitions, 300 flow [2022-01-19 13:37:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 118 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 13:37:19,391 INFO L242 Difference]: Finished difference. Result has 110 places, 113 transitions, 258 flow [2022-01-19 13:37:19,391 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=110, PETRI_TRANSITIONS=113} [2022-01-19 13:37:19,392 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2022-01-19 13:37:19,392 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 113 transitions, 258 flow [2022-01-19 13:37:19,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,393 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:19,393 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:19,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 13:37:19,393 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1312628711, now seen corresponding path program 1 times [2022-01-19 13:37:19,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:19,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690734868] [2022-01-19 13:37:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:19,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:37:19,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:19,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690734868] [2022-01-19 13:37:19,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690734868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:19,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:19,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:37:19,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865423558] [2022-01-19 13:37:19,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:19,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:37:19,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:37:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:37:19,442 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 13:37:19,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 113 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:19,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 13:37:19,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:19,495 INFO L129 PetriNetUnfolder]: 104/394 cut-off events. [2022-01-19 13:37:19,495 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-01-19 13:37:19,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 394 events. 104/394 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1529 event pairs, 11 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 521. Up to 48 conditions per place. [2022-01-19 13:37:19,500 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 17 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2022-01-19 13:37:19,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 310 flow [2022-01-19 13:37:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:37:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:37:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-01-19 13:37:19,501 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9121447028423773 [2022-01-19 13:37:19,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:19,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-01-19 13:37:19,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,503 INFO L186 Difference]: Start difference. First operand has 110 places, 113 transitions, 258 flow. Second operand 3 states and 353 transitions. [2022-01-19 13:37:19,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 310 flow [2022-01-19 13:37:19,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 119 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 13:37:19,506 INFO L242 Difference]: Finished difference. Result has 112 places, 114 transitions, 268 flow [2022-01-19 13:37:19,506 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2022-01-19 13:37:19,508 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 3 predicate places. [2022-01-19 13:37:19,508 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 268 flow [2022-01-19 13:37:19,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,508 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:19,508 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:19,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 13:37:19,509 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash 880183357, now seen corresponding path program 1 times [2022-01-19 13:37:19,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:19,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830750396] [2022-01-19 13:37:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:19,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:37:19,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830750396] [2022-01-19 13:37:19,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830750396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:19,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:19,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:37:19,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669300787] [2022-01-19 13:37:19,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:19,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:37:19,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:37:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:37:19,601 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 13:37:19,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:19,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 13:37:19,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:19,708 INFO L129 PetriNetUnfolder]: 151/480 cut-off events. [2022-01-19 13:37:19,708 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-01-19 13:37:19,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 480 events. 151/480 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2248 event pairs, 11 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 723. Up to 132 conditions per place. [2022-01-19 13:37:19,713 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 19 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2022-01-19 13:37:19,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 120 transitions, 324 flow [2022-01-19 13:37:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:37:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:37:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2022-01-19 13:37:19,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9018087855297158 [2022-01-19 13:37:19,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2022-01-19 13:37:19,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2022-01-19 13:37:19,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:19,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2022-01-19 13:37:19,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,717 INFO L186 Difference]: Start difference. First operand has 112 places, 114 transitions, 268 flow. Second operand 3 states and 349 transitions. [2022-01-19 13:37:19,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 120 transitions, 324 flow [2022-01-19 13:37:19,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 120 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 13:37:19,719 INFO L242 Difference]: Finished difference. Result has 114 places, 115 transitions, 278 flow [2022-01-19 13:37:19,719 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=114, PETRI_TRANSITIONS=115} [2022-01-19 13:37:19,721 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 5 predicate places. [2022-01-19 13:37:19,721 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 115 transitions, 278 flow [2022-01-19 13:37:19,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,721 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:19,722 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:19,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 13:37:19,722 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:19,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1934515373, now seen corresponding path program 1 times [2022-01-19 13:37:19,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:19,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189831209] [2022-01-19 13:37:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:19,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:37:19,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:19,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189831209] [2022-01-19 13:37:19,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189831209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:19,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:19,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 13:37:19,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114131524] [2022-01-19 13:37:19,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:19,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 13:37:19,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 13:37:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 13:37:19,814 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 13:37:19,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:19,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 13:37:19,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:19,883 INFO L129 PetriNetUnfolder]: 59/293 cut-off events. [2022-01-19 13:37:19,884 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-01-19 13:37:19,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 293 events. 59/293 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1277 event pairs, 20 based on Foata normal form. 12/283 useless extension candidates. Maximal degree in co-relation 486. Up to 57 conditions per place. [2022-01-19 13:37:19,887 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 17 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2022-01-19 13:37:19,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 121 transitions, 341 flow [2022-01-19 13:37:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 13:37:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 13:37:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2022-01-19 13:37:19,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8934108527131783 [2022-01-19 13:37:19,888 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2022-01-19 13:37:19,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2022-01-19 13:37:19,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:19,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2022-01-19 13:37:19,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,891 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,891 INFO L186 Difference]: Start difference. First operand has 114 places, 115 transitions, 278 flow. Second operand 4 states and 461 transitions. [2022-01-19 13:37:19,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 121 transitions, 341 flow [2022-01-19 13:37:19,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 13:37:19,894 INFO L242 Difference]: Finished difference. Result has 118 places, 116 transitions, 307 flow [2022-01-19 13:37:19,894 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=118, PETRI_TRANSITIONS=116} [2022-01-19 13:37:19,895 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 9 predicate places. [2022-01-19 13:37:19,895 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 116 transitions, 307 flow [2022-01-19 13:37:19,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,895 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:19,895 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:19,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 13:37:19,896 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:19,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2066757542, now seen corresponding path program 1 times [2022-01-19 13:37:19,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:19,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640109395] [2022-01-19 13:37:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:19,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-19 13:37:19,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640109395] [2022-01-19 13:37:19,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640109395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:19,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:19,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 13:37:19,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228435783] [2022-01-19 13:37:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:19,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 13:37:19,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 13:37:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 13:37:19,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 13:37:19,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 116 transitions, 307 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:19,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:19,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 13:37:19,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:20,158 INFO L129 PetriNetUnfolder]: 391/1567 cut-off events. [2022-01-19 13:37:20,158 INFO L130 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2022-01-19 13:37:20,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 1567 events. 391/1567 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11837 event pairs, 118 based on Foata normal form. 0/1424 useless extension candidates. Maximal degree in co-relation 2433. Up to 227 conditions per place. [2022-01-19 13:37:20,173 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 18 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2022-01-19 13:37:20,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 123 transitions, 369 flow [2022-01-19 13:37:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 13:37:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 13:37:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 462 transitions. [2022-01-19 13:37:20,175 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8953488372093024 [2022-01-19 13:37:20,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 462 transitions. [2022-01-19 13:37:20,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 462 transitions. [2022-01-19 13:37:20,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:20,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 462 transitions. [2022-01-19 13:37:20,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,178 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,178 INFO L186 Difference]: Start difference. First operand has 118 places, 116 transitions, 307 flow. Second operand 4 states and 462 transitions. [2022-01-19 13:37:20,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 123 transitions, 369 flow [2022-01-19 13:37:20,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 123 transitions, 364 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-01-19 13:37:20,183 INFO L242 Difference]: Finished difference. Result has 122 places, 117 transitions, 327 flow [2022-01-19 13:37:20,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2022-01-19 13:37:20,185 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 13 predicate places. [2022-01-19 13:37:20,185 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 327 flow [2022-01-19 13:37:20,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,185 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:20,186 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:20,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-19 13:37:20,186 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:20,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1475929136, now seen corresponding path program 1 times [2022-01-19 13:37:20,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:20,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113396276] [2022-01-19 13:37:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:20,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-19 13:37:20,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:20,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113396276] [2022-01-19 13:37:20,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113396276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:20,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:20,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 13:37:20,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625463389] [2022-01-19 13:37:20,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:20,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 13:37:20,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 13:37:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 13:37:20,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 13:37:20,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:20,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 13:37:20,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:20,392 INFO L129 PetriNetUnfolder]: 207/990 cut-off events. [2022-01-19 13:37:20,392 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-01-19 13:37:20,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 990 events. 207/990 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6848 event pairs, 87 based on Foata normal form. 48/945 useless extension candidates. Maximal degree in co-relation 1647. Up to 200 conditions per place. [2022-01-19 13:37:20,402 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 17 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2022-01-19 13:37:20,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 123 transitions, 388 flow [2022-01-19 13:37:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 13:37:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 13:37:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2022-01-19 13:37:20,403 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8934108527131783 [2022-01-19 13:37:20,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2022-01-19 13:37:20,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2022-01-19 13:37:20,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:20,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2022-01-19 13:37:20,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,405 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,405 INFO L186 Difference]: Start difference. First operand has 122 places, 117 transitions, 327 flow. Second operand 4 states and 461 transitions. [2022-01-19 13:37:20,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 123 transitions, 388 flow [2022-01-19 13:37:20,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 123 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 13:37:20,408 INFO L242 Difference]: Finished difference. Result has 126 places, 118 transitions, 357 flow [2022-01-19 13:37:20,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=357, PETRI_PLACES=126, PETRI_TRANSITIONS=118} [2022-01-19 13:37:20,409 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 17 predicate places. [2022-01-19 13:37:20,409 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 118 transitions, 357 flow [2022-01-19 13:37:20,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:20,409 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:20,409 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:20,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 13:37:20,410 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash 183224113, now seen corresponding path program 1 times [2022-01-19 13:37:20,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:20,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643336916] [2022-01-19 13:37:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:20,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 13:37:20,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643336916] [2022-01-19 13:37:20,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643336916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:37:20,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61517216] [2022-01-19 13:37:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:20,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:37:20,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:37:20,544 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 13:37:20,546 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 13:37:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:20,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 13:37:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:37:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 13:37:20,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:37:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 13:37:21,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61517216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:37:21,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:37:21,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-01-19 13:37:21,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951789184] [2022-01-19 13:37:21,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:37:21,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 13:37:21,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:21,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 13:37:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-19 13:37:21,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 13:37:21,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 118 transitions, 357 flow. Second operand has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:21,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:21,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 13:37:21,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:21,467 INFO L129 PetriNetUnfolder]: 894/3876 cut-off events. [2022-01-19 13:37:21,467 INFO L130 PetriNetUnfolder]: For 951/951 co-relation queries the response was YES. [2022-01-19 13:37:21,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6994 conditions, 3876 events. 894/3876 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 35845 event pairs, 111 based on Foata normal form. 1/3592 useless extension candidates. Maximal degree in co-relation 6979. Up to 878 conditions per place. [2022-01-19 13:37:21,502 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 36 selfloop transitions, 12 changer transitions 4/153 dead transitions. [2022-01-19 13:37:21,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 153 transitions, 544 flow [2022-01-19 13:37:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 13:37:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 13:37:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 795 transitions. [2022-01-19 13:37:21,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8803986710963455 [2022-01-19 13:37:21,504 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 795 transitions. [2022-01-19 13:37:21,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 795 transitions. [2022-01-19 13:37:21,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:21,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 795 transitions. [2022-01-19 13:37:21,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.57142857142857) internal successors, (795), 7 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:21,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:21,507 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:21,507 INFO L186 Difference]: Start difference. First operand has 126 places, 118 transitions, 357 flow. Second operand 7 states and 795 transitions. [2022-01-19 13:37:21,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 153 transitions, 544 flow [2022-01-19 13:37:21,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 539 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-01-19 13:37:21,512 INFO L242 Difference]: Finished difference. Result has 136 places, 129 transitions, 434 flow [2022-01-19 13:37:21,512 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=434, PETRI_PLACES=136, PETRI_TRANSITIONS=129} [2022-01-19 13:37:21,513 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 27 predicate places. [2022-01-19 13:37:21,513 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 129 transitions, 434 flow [2022-01-19 13:37:21,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:21,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:21,513 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:21,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 13:37:21,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 13:37:21,728 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:21,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1507117653, now seen corresponding path program 2 times [2022-01-19 13:37:21,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:21,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164923456] [2022-01-19 13:37:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:21,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:37:21,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164923456] [2022-01-19 13:37:21,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164923456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:37:21,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712522272] [2022-01-19 13:37:21,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 13:37:21,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:37:21,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:37:21,807 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 13:37:21,808 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 13:37:21,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:37:21,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:37:21,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 13:37:21,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:37:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:37:22,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:37:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:37:22,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712522272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:37:22,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:37:22,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-19 13:37:22,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834881027] [2022-01-19 13:37:22,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:37:22,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 13:37:22,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 13:37:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-19 13:37:22,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 13:37:22,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 129 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:22,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:22,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 13:37:22,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:22,731 INFO L129 PetriNetUnfolder]: 1065/4698 cut-off events. [2022-01-19 13:37:22,732 INFO L130 PetriNetUnfolder]: For 2113/2267 co-relation queries the response was YES. [2022-01-19 13:37:22,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9842 conditions, 4698 events. 1065/4698 cut-off events. For 2113/2267 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 45775 event pairs, 132 based on Foata normal form. 117/4475 useless extension candidates. Maximal degree in co-relation 9822. Up to 853 conditions per place. [2022-01-19 13:37:22,775 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 43 selfloop transitions, 26 changer transitions 4/174 dead transitions. [2022-01-19 13:37:22,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 174 transitions, 736 flow [2022-01-19 13:37:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 13:37:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 13:37:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 911 transitions. [2022-01-19 13:37:22,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8827519379844961 [2022-01-19 13:37:22,777 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 911 transitions. [2022-01-19 13:37:22,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 911 transitions. [2022-01-19 13:37:22,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:22,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 911 transitions. [2022-01-19 13:37:22,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:22,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:22,780 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:22,780 INFO L186 Difference]: Start difference. First operand has 136 places, 129 transitions, 434 flow. Second operand 8 states and 911 transitions. [2022-01-19 13:37:22,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 174 transitions, 736 flow [2022-01-19 13:37:22,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 174 transitions, 718 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-01-19 13:37:22,786 INFO L242 Difference]: Finished difference. Result has 143 places, 143 transitions, 577 flow [2022-01-19 13:37:22,786 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=577, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2022-01-19 13:37:22,786 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 34 predicate places. [2022-01-19 13:37:22,786 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 577 flow [2022-01-19 13:37:22,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:22,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:22,787 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:22,803 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 13:37:23,003 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,SelfDestructingSolverStorable10 [2022-01-19 13:37:23,003 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash -541813209, now seen corresponding path program 3 times [2022-01-19 13:37:23,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:23,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142674979] [2022-01-19 13:37:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:23,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:37:23,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:23,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142674979] [2022-01-19 13:37:23,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142674979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:37:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567870542] [2022-01-19 13:37:23,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 13:37:23,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:37:23,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:37:23,088 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 13:37:23,089 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 13:37:23,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 13:37:23,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:37:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 13:37:23,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:37:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:37:23,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:37:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:37:23,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567870542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:37:23,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:37:23,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-19 13:37:23,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287865954] [2022-01-19 13:37:23,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:37:23,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 13:37:23,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 13:37:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-19 13:37:23,517 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 13:37:23,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 143 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:23,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:23,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 13:37:23,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:24,162 INFO L129 PetriNetUnfolder]: 1418/6282 cut-off events. [2022-01-19 13:37:24,162 INFO L130 PetriNetUnfolder]: For 4973/5274 co-relation queries the response was YES. [2022-01-19 13:37:24,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14560 conditions, 6282 events. 1418/6282 cut-off events. For 4973/5274 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 66012 event pairs, 127 based on Foata normal form. 117/5935 useless extension candidates. Maximal degree in co-relation 14537. Up to 942 conditions per place. [2022-01-19 13:37:24,353 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 57 selfloop transitions, 28 changer transitions 4/190 dead transitions. [2022-01-19 13:37:24,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 190 transitions, 959 flow [2022-01-19 13:37:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 13:37:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 13:37:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 913 transitions. [2022-01-19 13:37:24,355 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8846899224806202 [2022-01-19 13:37:24,355 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 913 transitions. [2022-01-19 13:37:24,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 913 transitions. [2022-01-19 13:37:24,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:24,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 913 transitions. [2022-01-19 13:37:24,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.125) internal successors, (913), 8 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:24,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:24,358 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:24,359 INFO L186 Difference]: Start difference. First operand has 143 places, 143 transitions, 577 flow. Second operand 8 states and 913 transitions. [2022-01-19 13:37:24,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 190 transitions, 959 flow [2022-01-19 13:37:24,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 190 transitions, 874 flow, removed 39 selfloop flow, removed 3 redundant places. [2022-01-19 13:37:24,369 INFO L242 Difference]: Finished difference. Result has 148 places, 159 transitions, 697 flow [2022-01-19 13:37:24,369 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=697, PETRI_PLACES=148, PETRI_TRANSITIONS=159} [2022-01-19 13:37:24,369 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 39 predicate places. [2022-01-19 13:37:24,369 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 159 transitions, 697 flow [2022-01-19 13:37:24,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:24,370 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:24,370 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:24,387 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 13:37:24,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:37:24,580 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1027287213, now seen corresponding path program 4 times [2022-01-19 13:37:24,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:24,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291077759] [2022-01-19 13:37:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:24,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:24,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:24,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291077759] [2022-01-19 13:37:24,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291077759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:37:24,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165505995] [2022-01-19 13:37:24,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 13:37:24,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:37:24,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:37:24,742 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 13:37:24,743 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 13:37:24,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 13:37:24,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:37:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 13:37:24,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:37:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:25,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:37:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:25,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165505995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:37:25,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:37:25,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-19 13:37:25,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356422467] [2022-01-19 13:37:25,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:37:25,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 13:37:25,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:25,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 13:37:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-19 13:37:25,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 13:37:25,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 159 transitions, 697 flow. Second operand has 9 states, 9 states have (on average 107.88888888888889) internal successors, (971), 9 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:25,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:25,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 13:37:25,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:26,058 INFO L129 PetriNetUnfolder]: 1673/7467 cut-off events. [2022-01-19 13:37:26,059 INFO L130 PetriNetUnfolder]: For 6596/7193 co-relation queries the response was YES. [2022-01-19 13:37:26,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17561 conditions, 7467 events. 1673/7467 cut-off events. For 6596/7193 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 81557 event pairs, 161 based on Foata normal form. 233/7130 useless extension candidates. Maximal degree in co-relation 17537. Up to 1169 conditions per place. [2022-01-19 13:37:26,119 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 50 selfloop transitions, 61 changer transitions 4/216 dead transitions. [2022-01-19 13:37:26,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 216 transitions, 1174 flow [2022-01-19 13:37:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 13:37:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 13:37:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1029 transitions. [2022-01-19 13:37:26,121 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8863049095607235 [2022-01-19 13:37:26,121 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1029 transitions. [2022-01-19 13:37:26,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1029 transitions. [2022-01-19 13:37:26,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:26,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1029 transitions. [2022-01-19 13:37:26,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.33333333333333) internal successors, (1029), 9 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:26,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:26,124 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:26,124 INFO L186 Difference]: Start difference. First operand has 148 places, 159 transitions, 697 flow. Second operand 9 states and 1029 transitions. [2022-01-19 13:37:26,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 216 transitions, 1174 flow [2022-01-19 13:37:26,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 216 transitions, 1142 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-01-19 13:37:26,134 INFO L242 Difference]: Finished difference. Result has 155 places, 178 transitions, 962 flow [2022-01-19 13:37:26,134 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=962, PETRI_PLACES=155, PETRI_TRANSITIONS=178} [2022-01-19 13:37:26,135 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 46 predicate places. [2022-01-19 13:37:26,135 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 178 transitions, 962 flow [2022-01-19 13:37:26,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.88888888888889) internal successors, (971), 9 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:26,135 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:26,135 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:26,153 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 13:37:26,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:37:26,347 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash 828404773, now seen corresponding path program 5 times [2022-01-19 13:37:26,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:26,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587004335] [2022-01-19 13:37:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:26,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:26,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:26,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587004335] [2022-01-19 13:37:26,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587004335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:37:26,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967870930] [2022-01-19 13:37:26,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 13:37:26,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:37:26,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:37:26,423 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 13:37:26,424 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 13:37:26,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 13:37:26,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:37:26,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 13:37:26,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:37:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:26,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:37:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:26,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967870930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:37:26,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:37:26,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-19 13:37:26,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030767967] [2022-01-19 13:37:26,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:37:26,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 13:37:26,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:26,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 13:37:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-19 13:37:26,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 13:37:26,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 178 transitions, 962 flow. Second operand has 9 states, 9 states have (on average 107.88888888888889) internal successors, (971), 9 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:26,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:26,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 13:37:26,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:28,084 INFO L129 PetriNetUnfolder]: 2070/9309 cut-off events. [2022-01-19 13:37:28,084 INFO L130 PetriNetUnfolder]: For 12113/13247 co-relation queries the response was YES. [2022-01-19 13:37:28,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23530 conditions, 9309 events. 2070/9309 cut-off events. For 12113/13247 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 106746 event pairs, 157 based on Foata normal form. 234/8827 useless extension candidates. Maximal degree in co-relation 23504. Up to 1348 conditions per place. [2022-01-19 13:37:28,166 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 83 selfloop transitions, 47 changer transitions 4/235 dead transitions. [2022-01-19 13:37:28,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 235 transitions, 1525 flow [2022-01-19 13:37:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 13:37:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 13:37:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1029 transitions. [2022-01-19 13:37:28,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8863049095607235 [2022-01-19 13:37:28,168 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1029 transitions. [2022-01-19 13:37:28,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1029 transitions. [2022-01-19 13:37:28,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:28,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1029 transitions. [2022-01-19 13:37:28,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.33333333333333) internal successors, (1029), 9 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:28,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:28,171 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:28,171 INFO L186 Difference]: Start difference. First operand has 155 places, 178 transitions, 962 flow. Second operand 9 states and 1029 transitions. [2022-01-19 13:37:28,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 235 transitions, 1525 flow [2022-01-19 13:37:28,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 235 transitions, 1337 flow, removed 81 selfloop flow, removed 4 redundant places. [2022-01-19 13:37:28,189 INFO L242 Difference]: Finished difference. Result has 160 places, 197 transitions, 1095 flow [2022-01-19 13:37:28,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1095, PETRI_PLACES=160, PETRI_TRANSITIONS=197} [2022-01-19 13:37:28,190 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 51 predicate places. [2022-01-19 13:37:28,190 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 197 transitions, 1095 flow [2022-01-19 13:37:28,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.88888888888889) internal successors, (971), 9 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:28,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:28,191 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:28,209 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 13:37:28,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 13:37:28,403 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:28,404 INFO L85 PathProgramCache]: Analyzing trace with hash -157124963, now seen corresponding path program 6 times [2022-01-19 13:37:28,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:28,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133253505] [2022-01-19 13:37:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:28,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:28,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133253505] [2022-01-19 13:37:28,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133253505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:37:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647904173] [2022-01-19 13:37:28,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 13:37:28,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:37:28,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:37:28,491 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 13:37:28,492 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 13:37:28,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 13:37:28,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:37:28,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 13:37:28,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:37:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:28,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:37:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:37:29,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647904173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:37:29,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:37:29,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-01-19 13:37:29,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155303659] [2022-01-19 13:37:29,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:37:29,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 13:37:29,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 13:37:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-19 13:37:29,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 13:37:29,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 197 transitions, 1095 flow. Second operand has 10 states, 10 states have (on average 107.7) internal successors, (1077), 10 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 13:37:29,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:29,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 13:37:29,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:30,127 INFO L129 PetriNetUnfolder]: 1931/8767 cut-off events. [2022-01-19 13:37:30,128 INFO L130 PetriNetUnfolder]: For 11811/13032 co-relation queries the response was YES. [2022-01-19 13:37:30,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22085 conditions, 8767 events. 1931/8767 cut-off events. For 11811/13032 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 100217 event pairs, 76 based on Foata normal form. 663/8800 useless extension candidates. Maximal degree in co-relation 22059. Up to 776 conditions per place. [2022-01-19 13:37:30,217 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 44 selfloop transitions, 102 changer transitions 4/251 dead transitions. [2022-01-19 13:37:30,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 251 transitions, 1624 flow [2022-01-19 13:37:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 13:37:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 13:37:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1132 transitions. [2022-01-19 13:37:30,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8775193798449612 [2022-01-19 13:37:30,220 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1132 transitions. [2022-01-19 13:37:30,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1132 transitions. [2022-01-19 13:37:30,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:30,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1132 transitions. [2022-01-19 13:37:30,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.2) internal successors, (1132), 10 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:30,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:30,224 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:30,224 INFO L186 Difference]: Start difference. First operand has 160 places, 197 transitions, 1095 flow. Second operand 10 states and 1132 transitions. [2022-01-19 13:37:30,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 251 transitions, 1624 flow [2022-01-19 13:37:30,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 1596 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-01-19 13:37:30,239 INFO L242 Difference]: Finished difference. Result has 168 places, 213 transitions, 1428 flow [2022-01-19 13:37:30,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1428, PETRI_PLACES=168, PETRI_TRANSITIONS=213} [2022-01-19 13:37:30,240 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 59 predicate places. [2022-01-19 13:37:30,240 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 213 transitions, 1428 flow [2022-01-19 13:37:30,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.7) internal successors, (1077), 10 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 13:37:30,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:30,241 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:30,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-19 13:37:30,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 13:37:30,457 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash -317975230, now seen corresponding path program 7 times [2022-01-19 13:37:30,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:30,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725569368] [2022-01-19 13:37:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:30,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:37:30,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:30,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725569368] [2022-01-19 13:37:30,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725569368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:30,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:30,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:37:30,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214218231] [2022-01-19 13:37:30,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:30,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:37:30,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:37:30,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:37:30,486 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 13:37:30,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 213 transitions, 1428 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:30,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:30,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 13:37:30,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:31,109 INFO L129 PetriNetUnfolder]: 1389/6628 cut-off events. [2022-01-19 13:37:31,109 INFO L130 PetriNetUnfolder]: For 11477/12864 co-relation queries the response was YES. [2022-01-19 13:37:31,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17866 conditions, 6628 events. 1389/6628 cut-off events. For 11477/12864 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 71845 event pairs, 70 based on Foata normal form. 236/6382 useless extension candidates. Maximal degree in co-relation 17838. Up to 727 conditions per place. [2022-01-19 13:37:31,197 INFO L132 encePairwiseOnDemand]: 125/129 looper letters, 38 selfloop transitions, 4 changer transitions 0/216 dead transitions. [2022-01-19 13:37:31,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 216 transitions, 1520 flow [2022-01-19 13:37:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:37:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:37:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2022-01-19 13:37:31,199 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9043927648578811 [2022-01-19 13:37:31,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2022-01-19 13:37:31,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2022-01-19 13:37:31,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:31,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2022-01-19 13:37:31,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:31,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:31,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:31,201 INFO L186 Difference]: Start difference. First operand has 168 places, 213 transitions, 1428 flow. Second operand 3 states and 350 transitions. [2022-01-19 13:37:31,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 216 transitions, 1520 flow [2022-01-19 13:37:31,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 216 transitions, 1455 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-01-19 13:37:31,219 INFO L242 Difference]: Finished difference. Result has 165 places, 214 transitions, 1385 flow [2022-01-19 13:37:31,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1385, PETRI_PLACES=165, PETRI_TRANSITIONS=214} [2022-01-19 13:37:31,220 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 56 predicate places. [2022-01-19 13:37:31,220 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 214 transitions, 1385 flow [2022-01-19 13:37:31,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:31,220 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:31,221 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:31,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-19 13:37:31,221 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash 781976271, now seen corresponding path program 8 times [2022-01-19 13:37:31,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:31,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101034270] [2022-01-19 13:37:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:31,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:37:31,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:31,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101034270] [2022-01-19 13:37:31,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101034270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:31,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:31,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:37:31,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843106177] [2022-01-19 13:37:31,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:31,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:37:31,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:31,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:37:31,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:37:31,248 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 13:37:31,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 214 transitions, 1385 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:31,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:31,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 13:37:31,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:32,346 INFO L129 PetriNetUnfolder]: 3070/11638 cut-off events. [2022-01-19 13:37:32,346 INFO L130 PetriNetUnfolder]: For 22731/23630 co-relation queries the response was YES. [2022-01-19 13:37:32,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33305 conditions, 11638 events. 3070/11638 cut-off events. For 22731/23630 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 137865 event pairs, 359 based on Foata normal form. 307/10861 useless extension candidates. Maximal degree in co-relation 33280. Up to 1841 conditions per place. [2022-01-19 13:37:32,500 INFO L132 encePairwiseOnDemand]: 125/129 looper letters, 60 selfloop transitions, 4 changer transitions 0/239 dead transitions. [2022-01-19 13:37:32,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 239 transitions, 1760 flow [2022-01-19 13:37:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:37:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:37:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2022-01-19 13:37:32,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9095607235142119 [2022-01-19 13:37:32,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2022-01-19 13:37:32,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2022-01-19 13:37:32,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:32,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2022-01-19 13:37:32,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:32,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:32,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:32,504 INFO L186 Difference]: Start difference. First operand has 165 places, 214 transitions, 1385 flow. Second operand 3 states and 352 transitions. [2022-01-19 13:37:32,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 239 transitions, 1760 flow [2022-01-19 13:37:32,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 239 transitions, 1750 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-01-19 13:37:32,533 INFO L242 Difference]: Finished difference. Result has 167 places, 215 transitions, 1397 flow [2022-01-19 13:37:32,533 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1397, PETRI_PLACES=167, PETRI_TRANSITIONS=215} [2022-01-19 13:37:32,533 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 58 predicate places. [2022-01-19 13:37:32,533 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 215 transitions, 1397 flow [2022-01-19 13:37:32,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:32,534 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:37:32,534 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:32,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-19 13:37:32,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:37:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:37:32,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1598635536, now seen corresponding path program 9 times [2022-01-19 13:37:32,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:37:32,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228180858] [2022-01-19 13:37:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:37:32,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:37:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:37:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-19 13:37:32,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:37:32,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228180858] [2022-01-19 13:37:32,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228180858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:37:32,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:37:32,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:37:32,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692747257] [2022-01-19 13:37:32,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:37:32,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:37:32,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:37:32,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:37:32,558 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 13:37:32,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 215 transitions, 1397 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:32,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:32,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 13:37:32,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:32,822 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([334] L48-->L50: Formula: (= v_~pos~0_18 (+ v_~pos~0_17 1)) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post2, ~pos~0][68], [170#(not (= (+ ~d3~0 (* (div ~d3~0 256) (- 256))) 0)), 157#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), 131#(= (+ (- 1) ~g1~0) 0), Black: 136#(= (+ (- 1) ~d1~0) 0), Black: 179#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 178#(and (<= 2 ~pos~0) (<= ~pos~0 2)), Black: 141#(= (+ (- 1) ~g2~0) 0), 69#L72true, 4209#(not (= (+ ~g2~0 (* (- 256) (div ~g2~0 256))) 0)), 3536#(and (<= 2 ~pos~0) (<= ~pos~0 2)), 67#L121-4true, 126#true, Black: 156#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), Black: 164#(<= ~d2~0 (* (div ~d2~0 256) 256)), Black: 3531#(= ~pos~0 0), 2864#(and (<= 2 ~pos~0) (<= ~pos~0 2)), 151#(= (+ (- 1) ~d3~0) 0), Black: 849#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 171#(<= ~d3~0 (* (div ~d3~0 256) 256)), Black: 4201#true, 52#L87true, 2192#(and (<= 2 ~pos~0) (<= ~pos~0 2)), 57#L50true, 146#(= (+ (- 1) ~g3~0) 0), Black: 4207#true, 846#true, 175#true, 163#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 1520#(and (<= 2 ~pos~0) (<= ~pos~0 2)), 4215#(not (= (+ ~g3~0 (* (- 256) (div ~g3~0 256))) 0))]) [2022-01-19 13:37:32,822 INFO L384 tUnfolder$Statistics]: this new event has 81 ancestors and is cut-off event [2022-01-19 13:37:32,822 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2022-01-19 13:37:32,822 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2022-01-19 13:37:32,822 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2022-01-19 13:37:32,941 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([334] L48-->L50: Formula: (= v_~pos~0_18 (+ v_~pos~0_17 1)) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post2, ~pos~0][90], [170#(not (= (+ ~d3~0 (* (div ~d3~0 256) (- 256))) 0)), 3531#(= ~pos~0 0), 164#(<= ~d2~0 (* (div ~d2~0 256) 256)), 157#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), 131#(= (+ (- 1) ~g1~0) 0), Black: 136#(= (+ (- 1) ~d1~0) 0), Black: 179#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 178#(and (<= 2 ~pos~0) (<= ~pos~0 2)), Black: 141#(= (+ (- 1) ~g2~0) 0), 69#L72true, 4209#(not (= (+ ~g2~0 (* (- 256) (div ~g2~0 256))) 0)), 67#L121-4true, 126#true, Black: 156#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), Black: 163#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 2860#(= ~pos~0 0), 1519#(= ~pos~0 0), 151#(= (+ (- 1) ~d3~0) 0), Black: 849#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 171#(<= ~d3~0 (* (div ~d3~0 256) 256)), Black: 4201#true, 52#L87true, 146#(= (+ (- 1) ~g3~0) 0), 57#L50true, Black: 4207#true, 846#true, 175#true, 2189#(= ~pos~0 0), 4215#(not (= (+ ~g3~0 (* (- 256) (div ~g3~0 256))) 0))]) [2022-01-19 13:37:32,941 INFO L384 tUnfolder$Statistics]: this new event has 86 ancestors and is cut-off event [2022-01-19 13:37:32,941 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-01-19 13:37:32,941 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-01-19 13:37:32,941 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-01-19 13:37:33,276 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([333] L44-->L50: Formula: (= v_~pos~0_23 (+ v_~pos~0_24 1)) InVars {~pos~0=v_~pos~0_24} OutVars{thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_1|, ~pos~0=v_~pos~0_23} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post1, ~pos~0][113], [2861#(and (<= ~pos~0 1) (<= 1 ~pos~0)), 170#(not (= (+ ~d3~0 (* (div ~d3~0 256) (- 256))) 0)), Black: 131#(= (+ (- 1) ~g1~0) 0), 164#(<= ~d2~0 (* (div ~d2~0 256) 256)), 2190#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 136#(= (+ (- 1) ~d1~0) 0), Black: 179#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 178#(and (<= 2 ~pos~0) (<= ~pos~0 2)), Black: 141#(= (+ (- 1) ~g2~0) 0), 69#L72true, 4209#(not (= (+ ~g2~0 (* (- 256) (div ~g2~0 256))) 0)), 156#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), 67#L121-4true, 126#true, Black: 157#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), Black: 3531#(= ~pos~0 0), Black: 163#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 151#(= (+ (- 1) ~d3~0) 0), Black: 849#(and (<= ~pos~0 1) (<= 1 ~pos~0)), 52#L87true, Black: 4201#true, Black: 171#(<= ~d3~0 (* (div ~d3~0 256) 256)), 57#L50true, 146#(= (+ (- 1) ~g3~0) 0), Black: 4207#true, 1521#(and (<= ~pos~0 1) (<= 1 ~pos~0)), 846#true, 3532#(and (<= ~pos~0 1) (<= 1 ~pos~0)), 175#true, 4215#(not (= (+ ~g3~0 (* (- 256) (div ~g3~0 256))) 0))]) [2022-01-19 13:37:33,277 INFO L384 tUnfolder$Statistics]: this new event has 94 ancestors and is cut-off event [2022-01-19 13:37:33,277 INFO L387 tUnfolder$Statistics]: existing Event has 94 ancestors and is cut-off event [2022-01-19 13:37:33,277 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2022-01-19 13:37:33,277 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2022-01-19 13:37:33,475 INFO L129 PetriNetUnfolder]: 2774/10218 cut-off events. [2022-01-19 13:37:33,475 INFO L130 PetriNetUnfolder]: For 21144/21860 co-relation queries the response was YES. [2022-01-19 13:37:33,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30427 conditions, 10218 events. 2774/10218 cut-off events. For 21144/21860 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 118300 event pairs, 353 based on Foata normal form. 308/9527 useless extension candidates. Maximal degree in co-relation 30401. Up to 1828 conditions per place. [2022-01-19 13:37:33,564 INFO L132 encePairwiseOnDemand]: 125/129 looper letters, 0 selfloop transitions, 0 changer transitions 234/234 dead transitions. [2022-01-19 13:37:33,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 234 transitions, 1758 flow [2022-01-19 13:37:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:37:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:37:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2022-01-19 13:37:33,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9095607235142119 [2022-01-19 13:37:33,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2022-01-19 13:37:33,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2022-01-19 13:37:33,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:37:33,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2022-01-19 13:37:33,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:33,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:33,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:33,567 INFO L186 Difference]: Start difference. First operand has 167 places, 215 transitions, 1397 flow. Second operand 3 states and 352 transitions. [2022-01-19 13:37:33,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 234 transitions, 1758 flow [2022-01-19 13:37:33,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 234 transitions, 1699 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-01-19 13:37:33,591 INFO L242 Difference]: Finished difference. Result has 160 places, 0 transitions, 0 flow [2022-01-19 13:37:33,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=160, PETRI_TRANSITIONS=0} [2022-01-19 13:37:33,591 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 51 predicate places. [2022-01-19 13:37:33,591 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 0 transitions, 0 flow [2022-01-19 13:37:33,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:33,593 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-01-19 13:37:33,593 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-19 13:37:33,593 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-19 13:37:33,593 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-19 13:37:33,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-19 13:37:33,596 INFO L732 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:37:33,597 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 13:37:33,597 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 13:37:33,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 01:37:33 BasicIcfg [2022-01-19 13:37:33,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 13:37:33,599 INFO L158 Benchmark]: Toolchain (without parser) took 15799.42ms. Allocated memory was 358.6MB in the beginning and 1.8GB in the end (delta: 1.5GB). Free memory was 303.3MB in the beginning and 976.5MB in the end (delta: -673.2MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2022-01-19 13:37:33,599 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 358.6MB. Free memory is still 319.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 13:37:33,599 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.17ms. Allocated memory is still 358.6MB. Free memory was 302.9MB in the beginning and 329.9MB in the end (delta: -26.9MB). Peak memory consumption was 10.8MB. Max. memory is 16.0GB. [2022-01-19 13:37:33,599 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.39ms. Allocated memory is still 358.6MB. Free memory was 329.9MB in the beginning and 327.8MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-19 13:37:33,600 INFO L158 Benchmark]: Boogie Preprocessor took 31.75ms. Allocated memory is still 358.6MB. Free memory was 327.8MB in the beginning and 326.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 13:37:33,600 INFO L158 Benchmark]: RCFGBuilder took 253.33ms. Allocated memory is still 358.6MB. Free memory was 326.5MB in the beginning and 311.1MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2022-01-19 13:37:33,600 INFO L158 Benchmark]: TraceAbstraction took 15192.05ms. Allocated memory was 358.6MB in the beginning and 1.8GB in the end (delta: 1.5GB). Free memory was 310.4MB in the beginning and 976.5MB in the end (delta: -666.1MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2022-01-19 13:37:33,601 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 358.6MB. Free memory is still 319.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 282.17ms. Allocated memory is still 358.6MB. Free memory was 302.9MB in the beginning and 329.9MB in the end (delta: -26.9MB). Peak memory consumption was 10.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 33.39ms. Allocated memory is still 358.6MB. Free memory was 329.9MB in the beginning and 327.8MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.75ms. Allocated memory is still 358.6MB. Free memory was 327.8MB in the beginning and 326.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 253.33ms. Allocated memory is still 358.6MB. Free memory was 326.5MB in the beginning and 311.1MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 15192.05ms. Allocated memory was 358.6MB in the beginning and 1.8GB in the end (delta: 1.5GB). Free memory was 310.4MB in the beginning and 976.5MB in the end (delta: -666.1MB). Peak memory consumption was 1.3GB. 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 - PositiveResult [Line: 127]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 156 locations, 4 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: 15.1s, OverallIterations: 18, TraceHistogramMax: 3, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 267 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 267 mSDsluCounter, 485 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1153 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2157 IncrementalHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 123 mSDtfsCounter, 2157 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1426 GetRequests, 1311 SyntacticMatches, 50 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1428occurred in iteration=15, InterpolantAutomatonStates: 89, 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, 3.5s InterpolantComputationTime, 2447 NumberOfCodeBlocks, 2412 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 3077 ConstructedInterpolants, 0 QuantifiedInterpolants, 10271 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1449 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 30 InterpolantComputations, 12 PerfectInterpolantSequences, 136/439 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-19 13:37:33,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...