/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:33:10,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:33:10,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:33:10,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:33:10,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:33:10,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:33:10,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:33:10,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:33:10,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:33:10,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:33:10,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:33:10,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:33:10,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:33:10,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:33:10,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:33:10,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:33:10,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:33:10,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:33:10,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:33:10,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:33:10,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:33:10,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:33:10,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:33:10,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:33:10,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:33:10,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:33:10,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:33:10,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:33:10,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:33:10,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:33:10,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:33:10,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:33:10,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:33:10,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:33:10,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:33:10,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:33:10,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:33:10,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:33:10,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:33:10,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:33:10,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:33:10,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf [2022-01-19 08:33:10,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:33:10,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:33:10,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:33:10,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:33:10,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:33:10,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:33:10,669 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:33:10,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:33:10,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:33:10,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:33:10,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:33:10,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:33:10,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:33:10,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:33:10,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:33:10,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:33:10,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:33:10,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:33:10,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:33:10,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:33:10,672 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:33:10,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:33:10,672 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:33:10,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:33:10,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:33:10,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:33:10,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:33:10,875 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:33:10,875 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:33:10,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-01-19 08:33:10,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461459566/44402446edd246c589e26b4a3735a7e9/FLAGed85fbeb4 [2022-01-19 08:33:11,239 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:33:11,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-01-19 08:33:11,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461459566/44402446edd246c589e26b4a3735a7e9/FLAGed85fbeb4 [2022-01-19 08:33:11,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461459566/44402446edd246c589e26b4a3735a7e9 [2022-01-19 08:33:11,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:33:11,654 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:33:11,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:33:11,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:33:11,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:33:11,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@280c0c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11, skipping insertion in model container [2022-01-19 08:33:11,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:33:11,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:33:11,809 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-01-19 08:33:11,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:33:11,818 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:33:11,832 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-01-19 08:33:11,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:33:11,843 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:33:11,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11 WrapperNode [2022-01-19 08:33:11,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:33:11,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:33:11,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:33:11,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:33:11,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,870 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-01-19 08:33:11,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:33:11,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:33:11,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:33:11,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:33:11,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:33:11,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:33:11,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:33:11,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:33:11,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (1/1) ... [2022-01-19 08:33:11,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:33:11,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:11,910 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 08:33:11,915 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 08:33:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:33:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:33:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:33:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:33:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:33:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:33:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:33:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:33:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:33:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:33:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:33:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 08:33:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:33:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:33:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:33:11,942 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 08:33:12,011 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:33:12,012 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:33:12,202 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:33:12,247 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:33:12,247 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 08:33:12,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:33:12 BoogieIcfgContainer [2022-01-19 08:33:12,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:33:12,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:33:12,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:33:12,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:33:12,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:33:11" (1/3) ... [2022-01-19 08:33:12,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cfea41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:33:12, skipping insertion in model container [2022-01-19 08:33:12,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:33:11" (2/3) ... [2022-01-19 08:33:12,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cfea41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:33:12, skipping insertion in model container [2022-01-19 08:33:12,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:33:12" (3/3) ... [2022-01-19 08:33:12,254 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-01-19 08:33:12,257 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:33:12,257 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:33:12,258 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:33:12,285 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,285 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,285 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,286 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,286 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,286 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,286 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,286 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,286 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,286 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,287 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,287 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,287 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,287 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,287 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,287 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,288 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,288 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,288 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,288 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,288 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,288 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,290 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,290 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,290 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,290 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,290 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,290 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,290 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,290 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,293 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,296 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,296 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:33:12,299 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:33:12,327 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:33:12,332 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 08:33:12,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:33:12,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2022-01-19 08:33:12,375 INFO L129 PetriNetUnfolder]: 11/143 cut-off events. [2022-01-19 08:33:12,375 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:33:12,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2022-01-19 08:33:12,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2022-01-19 08:33:12,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2022-01-19 08:33:12,425 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2022-01-19 08:33:12,425 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:33:12,426 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:12,427 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:12,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash 956022790, now seen corresponding path program 1 times [2022-01-19 08:33:12,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:12,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280277524] [2022-01-19 08:33:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:12,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:12,658 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 08:33:12,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:12,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280277524] [2022-01-19 08:33:12,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280277524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:12,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:12,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 08:33:12,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281189154] [2022-01-19 08:33:12,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:12,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 08:33:12,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 08:33:12,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 08:33:12,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 145 [2022-01-19 08:33:12,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 280 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:12,699 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:12,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 145 [2022-01-19 08:33:12,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:12,757 INFO L129 PetriNetUnfolder]: 12/160 cut-off events. [2022-01-19 08:33:12,757 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-01-19 08:33:12,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 160 events. 12/160 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 5 based on Foata normal form. 14/161 useless extension candidates. Maximal degree in co-relation 104. Up to 22 conditions per place. [2022-01-19 08:33:12,760 INFO L132 encePairwiseOnDemand]: 137/145 looper letters, 7 selfloop transitions, 0 changer transitions 4/126 dead transitions. [2022-01-19 08:33:12,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 278 flow [2022-01-19 08:33:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 08:33:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 08:33:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-01-19 08:33:12,776 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9413793103448276 [2022-01-19 08:33:12,777 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-01-19 08:33:12,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-01-19 08:33:12,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:12,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-01-19 08:33:12,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:12,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:12,792 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:12,794 INFO L186 Difference]: Start difference. First operand has 130 places, 134 transitions, 280 flow. Second operand 2 states and 273 transitions. [2022-01-19 08:33:12,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 278 flow [2022-01-19 08:33:12,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:33:12,801 INFO L242 Difference]: Finished difference. Result has 127 places, 122 transitions, 248 flow [2022-01-19 08:33:12,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2022-01-19 08:33:12,807 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, -3 predicate places. [2022-01-19 08:33:12,807 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 248 flow [2022-01-19 08:33:12,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:12,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:12,808 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:12,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:33:12,808 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:12,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1518951431, now seen corresponding path program 1 times [2022-01-19 08:33:12,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:12,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207794397] [2022-01-19 08:33:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:12,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:12,993 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 08:33:12,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:12,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207794397] [2022-01-19 08:33:12,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207794397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:12,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:12,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:33:12,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734759431] [2022-01-19 08:33:12,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:12,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:33:12,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:33:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:33:12,998 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 145 [2022-01-19 08:33:12,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 122 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:12,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:12,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 145 [2022-01-19 08:33:12,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:13,107 INFO L129 PetriNetUnfolder]: 12/193 cut-off events. [2022-01-19 08:33:13,107 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 08:33:13,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 193 events. 12/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 294 event pairs, 5 based on Foata normal form. 5/187 useless extension candidates. Maximal degree in co-relation 241. Up to 31 conditions per place. [2022-01-19 08:33:13,109 INFO L132 encePairwiseOnDemand]: 135/145 looper letters, 19 selfloop transitions, 6 changer transitions 3/129 dead transitions. [2022-01-19 08:33:13,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 129 transitions, 320 flow [2022-01-19 08:33:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 08:33:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 08:33:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2022-01-19 08:33:13,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8236453201970443 [2022-01-19 08:33:13,111 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2022-01-19 08:33:13,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2022-01-19 08:33:13,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:13,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2022-01-19 08:33:13,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,117 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,117 INFO L186 Difference]: Start difference. First operand has 127 places, 122 transitions, 248 flow. Second operand 7 states and 836 transitions. [2022-01-19 08:33:13,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 129 transitions, 320 flow [2022-01-19 08:33:13,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:33:13,121 INFO L242 Difference]: Finished difference. Result has 131 places, 123 transitions, 274 flow [2022-01-19 08:33:13,121 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2022-01-19 08:33:13,122 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 1 predicate places. [2022-01-19 08:33:13,123 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 274 flow [2022-01-19 08:33:13,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:13,123 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:13,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:33:13,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash 635041614, now seen corresponding path program 1 times [2022-01-19 08:33:13,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:13,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079993925] [2022-01-19 08:33:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:13,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:13,249 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 08:33:13,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079993925] [2022-01-19 08:33:13,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079993925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:13,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:13,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 08:33:13,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696233615] [2022-01-19 08:33:13,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:13,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 08:33:13,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 08:33:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 08:33:13,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2022-01-19 08:33:13,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:13,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2022-01-19 08:33:13,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:13,287 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2022-01-19 08:33:13,288 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-01-19 08:33:13,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 163 events. 12/163 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 1 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 213. Up to 22 conditions per place. [2022-01-19 08:33:13,291 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 11 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2022-01-19 08:33:13,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 313 flow [2022-01-19 08:33:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 08:33:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 08:33:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2022-01-19 08:33:13,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2022-01-19 08:33:13,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2022-01-19 08:33:13,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2022-01-19 08:33:13,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:13,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2022-01-19 08:33:13,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,295 INFO L186 Difference]: Start difference. First operand has 131 places, 123 transitions, 274 flow. Second operand 3 states and 390 transitions. [2022-01-19 08:33:13,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 313 flow [2022-01-19 08:33:13,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:33:13,299 INFO L242 Difference]: Finished difference. Result has 129 places, 125 transitions, 287 flow [2022-01-19 08:33:13,300 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2022-01-19 08:33:13,301 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2022-01-19 08:33:13,301 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 287 flow [2022-01-19 08:33:13,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,301 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:13,302 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:13,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 08:33:13,302 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:13,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1090197722, now seen corresponding path program 2 times [2022-01-19 08:33:13,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:13,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051348353] [2022-01-19 08:33:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:13,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:13,800 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 08:33:13,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051348353] [2022-01-19 08:33:13,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051348353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:13,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:13,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:13,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350382399] [2022-01-19 08:33:13,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:13,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:13,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:13,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:13,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 287 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:13,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:13,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:13,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:14,130 INFO L129 PetriNetUnfolder]: 120/413 cut-off events. [2022-01-19 08:33:14,130 INFO L130 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-01-19 08:33:14,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 413 events. 120/413 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1611 event pairs, 19 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 800. Up to 174 conditions per place. [2022-01-19 08:33:14,133 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 64 selfloop transitions, 21 changer transitions 6/171 dead transitions. [2022-01-19 08:33:14,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 598 flow [2022-01-19 08:33:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 08:33:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 08:33:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1605 transitions. [2022-01-19 08:33:14,135 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6511156186612576 [2022-01-19 08:33:14,135 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1605 transitions. [2022-01-19 08:33:14,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1605 transitions. [2022-01-19 08:33:14,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:14,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1605 transitions. [2022-01-19 08:33:14,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.41176470588235) internal successors, (1605), 17 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,142 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,142 INFO L186 Difference]: Start difference. First operand has 129 places, 125 transitions, 287 flow. Second operand 17 states and 1605 transitions. [2022-01-19 08:33:14,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 598 flow [2022-01-19 08:33:14,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 570 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-01-19 08:33:14,146 INFO L242 Difference]: Finished difference. Result has 151 places, 141 transitions, 391 flow [2022-01-19 08:33:14,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=391, PETRI_PLACES=151, PETRI_TRANSITIONS=141} [2022-01-19 08:33:14,146 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 21 predicate places. [2022-01-19 08:33:14,147 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 141 transitions, 391 flow [2022-01-19 08:33:14,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:14,147 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:14,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 08:33:14,147 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2017920004, now seen corresponding path program 3 times [2022-01-19 08:33:14,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:14,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353626536] [2022-01-19 08:33:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:14,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:14,465 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 08:33:14,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353626536] [2022-01-19 08:33:14,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353626536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:14,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:14,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:14,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184815194] [2022-01-19 08:33:14,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:14,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:14,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:14,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:14,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:14,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:14,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 141 transitions, 391 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:14,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:14,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:14,865 INFO L129 PetriNetUnfolder]: 130/473 cut-off events. [2022-01-19 08:33:14,865 INFO L130 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2022-01-19 08:33:14,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 473 events. 130/473 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2163 event pairs, 18 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1051. Up to 172 conditions per place. [2022-01-19 08:33:14,868 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 69 selfloop transitions, 26 changer transitions 6/181 dead transitions. [2022-01-19 08:33:14,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 181 transitions, 751 flow [2022-01-19 08:33:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 08:33:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 08:33:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2022-01-19 08:33:14,874 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-01-19 08:33:14,874 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2022-01-19 08:33:14,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2022-01-19 08:33:14,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:14,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2022-01-19 08:33:14,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,880 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,880 INFO L186 Difference]: Start difference. First operand has 151 places, 141 transitions, 391 flow. Second operand 18 states and 1701 transitions. [2022-01-19 08:33:14,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 181 transitions, 751 flow [2022-01-19 08:33:14,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 181 transitions, 731 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-01-19 08:33:14,884 INFO L242 Difference]: Finished difference. Result has 164 places, 146 transitions, 478 flow [2022-01-19 08:33:14,884 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=478, PETRI_PLACES=164, PETRI_TRANSITIONS=146} [2022-01-19 08:33:14,885 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 34 predicate places. [2022-01-19 08:33:14,885 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 146 transitions, 478 flow [2022-01-19 08:33:14,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:14,886 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:14,886 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:14,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 08:33:14,886 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:14,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:14,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1240418182, now seen corresponding path program 4 times [2022-01-19 08:33:14,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:14,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913529083] [2022-01-19 08:33:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:14,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:15,181 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 08:33:15,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:15,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913529083] [2022-01-19 08:33:15,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913529083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:15,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:15,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:15,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150783870] [2022-01-19 08:33:15,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:15,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:15,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:15,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:15,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:15,185 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:15,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 146 transitions, 478 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:15,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:15,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:15,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:15,496 INFO L129 PetriNetUnfolder]: 141/517 cut-off events. [2022-01-19 08:33:15,496 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2022-01-19 08:33:15,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 517 events. 141/517 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2536 event pairs, 46 based on Foata normal form. 1/510 useless extension candidates. Maximal degree in co-relation 1319. Up to 229 conditions per place. [2022-01-19 08:33:15,499 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 70 selfloop transitions, 29 changer transitions 6/185 dead transitions. [2022-01-19 08:33:15,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 897 flow [2022-01-19 08:33:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:33:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:33:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2022-01-19 08:33:15,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6538793103448276 [2022-01-19 08:33:15,503 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2022-01-19 08:33:15,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2022-01-19 08:33:15,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:15,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2022-01-19 08:33:15,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:15,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:15,510 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:15,510 INFO L186 Difference]: Start difference. First operand has 164 places, 146 transitions, 478 flow. Second operand 16 states and 1517 transitions. [2022-01-19 08:33:15,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 897 flow [2022-01-19 08:33:15,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 185 transitions, 809 flow, removed 26 selfloop flow, removed 12 redundant places. [2022-01-19 08:33:15,516 INFO L242 Difference]: Finished difference. Result has 172 places, 158 transitions, 611 flow [2022-01-19 08:33:15,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=611, PETRI_PLACES=172, PETRI_TRANSITIONS=158} [2022-01-19 08:33:15,518 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 42 predicate places. [2022-01-19 08:33:15,518 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 158 transitions, 611 flow [2022-01-19 08:33:15,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:15,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:15,519 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:15,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 08:33:15,519 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2118618490, now seen corresponding path program 5 times [2022-01-19 08:33:15,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173659944] [2022-01-19 08:33:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:15,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:15,838 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 08:33:15,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173659944] [2022-01-19 08:33:15,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173659944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:15,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:15,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:15,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937727294] [2022-01-19 08:33:15,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:15,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:15,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:15,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:15,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 158 transitions, 611 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:15,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:15,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:15,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:16,121 INFO L129 PetriNetUnfolder]: 145/538 cut-off events. [2022-01-19 08:33:16,121 INFO L130 PetriNetUnfolder]: For 746/746 co-relation queries the response was YES. [2022-01-19 08:33:16,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 538 events. 145/538 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2692 event pairs, 48 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 1504. Up to 241 conditions per place. [2022-01-19 08:33:16,125 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 74 selfloop transitions, 35 changer transitions 6/195 dead transitions. [2022-01-19 08:33:16,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 195 transitions, 1073 flow [2022-01-19 08:33:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:33:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:33:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2022-01-19 08:33:16,129 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6547413793103448 [2022-01-19 08:33:16,129 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2022-01-19 08:33:16,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2022-01-19 08:33:16,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:16,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2022-01-19 08:33:16,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.9375) internal successors, (1519), 16 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,134 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,134 INFO L186 Difference]: Start difference. First operand has 172 places, 158 transitions, 611 flow. Second operand 16 states and 1519 transitions. [2022-01-19 08:33:16,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 195 transitions, 1073 flow [2022-01-19 08:33:16,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 195 transitions, 1012 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-01-19 08:33:16,140 INFO L242 Difference]: Finished difference. Result has 183 places, 171 transitions, 811 flow [2022-01-19 08:33:16,141 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=811, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2022-01-19 08:33:16,141 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 53 predicate places. [2022-01-19 08:33:16,141 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 811 flow [2022-01-19 08:33:16,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,142 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:16,142 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:16,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 08:33:16,142 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash 496787528, now seen corresponding path program 6 times [2022-01-19 08:33:16,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:16,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473660173] [2022-01-19 08:33:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:16,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:16,390 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 08:33:16,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473660173] [2022-01-19 08:33:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473660173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:16,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:16,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:16,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076086032] [2022-01-19 08:33:16,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:16,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:16,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:16,392 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:16,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 811 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:16,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:16,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:16,641 INFO L129 PetriNetUnfolder]: 146/545 cut-off events. [2022-01-19 08:33:16,641 INFO L130 PetriNetUnfolder]: For 1213/1213 co-relation queries the response was YES. [2022-01-19 08:33:16,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 545 events. 146/545 cut-off events. For 1213/1213 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2792 event pairs, 43 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 1650. Up to 255 conditions per place. [2022-01-19 08:33:16,645 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 78 selfloop transitions, 30 changer transitions 7/195 dead transitions. [2022-01-19 08:33:16,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 195 transitions, 1182 flow [2022-01-19 08:33:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:33:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:33:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1512 transitions. [2022-01-19 08:33:16,648 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-01-19 08:33:16,648 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1512 transitions. [2022-01-19 08:33:16,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1512 transitions. [2022-01-19 08:33:16,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:16,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1512 transitions. [2022-01-19 08:33:16,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.5) internal successors, (1512), 16 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,653 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,653 INFO L186 Difference]: Start difference. First operand has 183 places, 171 transitions, 811 flow. Second operand 16 states and 1512 transitions. [2022-01-19 08:33:16,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 195 transitions, 1182 flow [2022-01-19 08:33:16,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 1101 flow, removed 36 selfloop flow, removed 7 redundant places. [2022-01-19 08:33:16,660 INFO L242 Difference]: Finished difference. Result has 192 places, 173 transitions, 828 flow [2022-01-19 08:33:16,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=828, PETRI_PLACES=192, PETRI_TRANSITIONS=173} [2022-01-19 08:33:16,661 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 62 predicate places. [2022-01-19 08:33:16,661 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 173 transitions, 828 flow [2022-01-19 08:33:16,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:16,662 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:16,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-19 08:33:16,662 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1259341386, now seen corresponding path program 7 times [2022-01-19 08:33:16,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:16,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355191205] [2022-01-19 08:33:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:16,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:16,958 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 08:33:16,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355191205] [2022-01-19 08:33:16,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355191205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:16,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:16,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:16,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765801384] [2022-01-19 08:33:16,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:16,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:16,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:16,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:16,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:16,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 173 transitions, 828 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:16,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:16,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:16,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:17,217 INFO L129 PetriNetUnfolder]: 149/551 cut-off events. [2022-01-19 08:33:17,217 INFO L130 PetriNetUnfolder]: For 1324/1324 co-relation queries the response was YES. [2022-01-19 08:33:17,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1711 conditions, 551 events. 149/551 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2865 event pairs, 45 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 1681. Up to 255 conditions per place. [2022-01-19 08:33:17,221 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 31 changer transitions 6/197 dead transitions. [2022-01-19 08:33:17,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 1208 flow [2022-01-19 08:33:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:33:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:33:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-01-19 08:33:17,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-01-19 08:33:17,223 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-01-19 08:33:17,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-01-19 08:33:17,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:17,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-01-19 08:33:17,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,229 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,229 INFO L186 Difference]: Start difference. First operand has 192 places, 173 transitions, 828 flow. Second operand 16 states and 1514 transitions. [2022-01-19 08:33:17,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 1208 flow [2022-01-19 08:33:17,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 197 transitions, 1137 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-01-19 08:33:17,235 INFO L242 Difference]: Finished difference. Result has 195 places, 174 transitions, 851 flow [2022-01-19 08:33:17,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=851, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2022-01-19 08:33:17,236 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 65 predicate places. [2022-01-19 08:33:17,236 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 851 flow [2022-01-19 08:33:17,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:17,237 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:17,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 08:33:17,237 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash -677590396, now seen corresponding path program 8 times [2022-01-19 08:33:17,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:17,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465160459] [2022-01-19 08:33:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:17,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:17,508 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 08:33:17,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:17,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465160459] [2022-01-19 08:33:17,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465160459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:17,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:17,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:17,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162305515] [2022-01-19 08:33:17,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:17,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:17,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:17,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:17,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:17,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:17,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 851 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:17,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:17,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:17,845 INFO L129 PetriNetUnfolder]: 153/574 cut-off events. [2022-01-19 08:33:17,845 INFO L130 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2022-01-19 08:33:17,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 574 events. 153/574 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3089 event pairs, 47 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1783. Up to 247 conditions per place. [2022-01-19 08:33:17,849 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 36 changer transitions 6/202 dead transitions. [2022-01-19 08:33:17,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 202 transitions, 1281 flow [2022-01-19 08:33:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 08:33:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 08:33:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1607 transitions. [2022-01-19 08:33:17,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6519269776876268 [2022-01-19 08:33:17,851 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1607 transitions. [2022-01-19 08:33:17,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1607 transitions. [2022-01-19 08:33:17,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:17,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1607 transitions. [2022-01-19 08:33:17,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.52941176470588) internal successors, (1607), 17 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,855 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,856 INFO L186 Difference]: Start difference. First operand has 195 places, 174 transitions, 851 flow. Second operand 17 states and 1607 transitions. [2022-01-19 08:33:17,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 202 transitions, 1281 flow [2022-01-19 08:33:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 202 transitions, 1197 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-01-19 08:33:17,862 INFO L242 Difference]: Finished difference. Result has 200 places, 177 transitions, 904 flow [2022-01-19 08:33:17,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=904, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2022-01-19 08:33:17,863 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 70 predicate places. [2022-01-19 08:33:17,863 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 904 flow [2022-01-19 08:33:17,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:17,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:17,864 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:17,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-19 08:33:17,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:17,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1724094068, now seen corresponding path program 9 times [2022-01-19 08:33:17,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:17,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413136631] [2022-01-19 08:33:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:17,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:18,085 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 08:33:18,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:18,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413136631] [2022-01-19 08:33:18,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413136631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:18,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:18,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:18,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368809426] [2022-01-19 08:33:18,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:18,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:18,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:18,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:18,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:18,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 177 transitions, 904 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:18,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:18,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:18,384 INFO L129 PetriNetUnfolder]: 154/581 cut-off events. [2022-01-19 08:33:18,384 INFO L130 PetriNetUnfolder]: For 2009/2009 co-relation queries the response was YES. [2022-01-19 08:33:18,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1899 conditions, 581 events. 154/581 cut-off events. For 2009/2009 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3149 event pairs, 53 based on Foata normal form. 1/570 useless extension candidates. Maximal degree in co-relation 1865. Up to 275 conditions per place. [2022-01-19 08:33:18,388 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 83 selfloop transitions, 32 changer transitions 7/202 dead transitions. [2022-01-19 08:33:18,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 202 transitions, 1342 flow [2022-01-19 08:33:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:33:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:33:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-01-19 08:33:18,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-01-19 08:33:18,390 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-01-19 08:33:18,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-01-19 08:33:18,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:18,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-01-19 08:33:18,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,393 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,394 INFO L186 Difference]: Start difference. First operand has 200 places, 177 transitions, 904 flow. Second operand 16 states and 1514 transitions. [2022-01-19 08:33:18,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 202 transitions, 1342 flow [2022-01-19 08:33:18,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 202 transitions, 1230 flow, removed 24 selfloop flow, removed 13 redundant places. [2022-01-19 08:33:18,401 INFO L242 Difference]: Finished difference. Result has 203 places, 179 transitions, 917 flow [2022-01-19 08:33:18,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=917, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2022-01-19 08:33:18,401 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 73 predicate places. [2022-01-19 08:33:18,401 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 917 flow [2022-01-19 08:33:18,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,402 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:18,402 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:18,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-19 08:33:18,402 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:18,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1551141820, now seen corresponding path program 10 times [2022-01-19 08:33:18,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:18,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180081498] [2022-01-19 08:33:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:18,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:18,679 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 08:33:18,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:18,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180081498] [2022-01-19 08:33:18,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180081498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:18,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:18,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:18,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661061112] [2022-01-19 08:33:18,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:18,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:18,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:18,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:18,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:18,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:18,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 917 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:18,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:18,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:18,956 INFO L129 PetriNetUnfolder]: 157/584 cut-off events. [2022-01-19 08:33:18,956 INFO L130 PetriNetUnfolder]: For 1973/1973 co-relation queries the response was YES. [2022-01-19 08:33:18,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 584 events. 157/584 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3192 event pairs, 47 based on Foata normal form. 1/573 useless extension candidates. Maximal degree in co-relation 1876. Up to 275 conditions per place. [2022-01-19 08:33:18,960 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 33 changer transitions 6/204 dead transitions. [2022-01-19 08:33:18,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 204 transitions, 1344 flow [2022-01-19 08:33:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:33:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:33:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-01-19 08:33:18,962 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-01-19 08:33:18,962 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-01-19 08:33:18,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-01-19 08:33:18,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:18,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-01-19 08:33:18,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,966 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,966 INFO L186 Difference]: Start difference. First operand has 203 places, 179 transitions, 917 flow. Second operand 16 states and 1516 transitions. [2022-01-19 08:33:18,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 204 transitions, 1344 flow [2022-01-19 08:33:18,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 204 transitions, 1266 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-01-19 08:33:18,973 INFO L242 Difference]: Finished difference. Result has 206 places, 180 transitions, 941 flow [2022-01-19 08:33:18,974 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=941, PETRI_PLACES=206, PETRI_TRANSITIONS=180} [2022-01-19 08:33:18,974 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 76 predicate places. [2022-01-19 08:33:18,974 INFO L470 AbstractCegarLoop]: Abstraction has has 206 places, 180 transitions, 941 flow [2022-01-19 08:33:18,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:18,975 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:18,975 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:18,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 08:33:18,975 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -690381868, now seen corresponding path program 11 times [2022-01-19 08:33:18,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787296489] [2022-01-19 08:33:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:18,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:19,221 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 08:33:19,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:19,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787296489] [2022-01-19 08:33:19,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787296489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:19,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:19,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:19,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84466748] [2022-01-19 08:33:19,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:19,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:19,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:19,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:19,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:19,223 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:19,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 180 transitions, 941 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:19,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:19,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:19,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:19,551 INFO L129 PetriNetUnfolder]: 159/598 cut-off events. [2022-01-19 08:33:19,551 INFO L130 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2022-01-19 08:33:19,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 598 events. 159/598 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3288 event pairs, 51 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 1951. Up to 261 conditions per place. [2022-01-19 08:33:19,555 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 39 changer transitions 6/207 dead transitions. [2022-01-19 08:33:19,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 207 transitions, 1403 flow [2022-01-19 08:33:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 08:33:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 08:33:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1609 transitions. [2022-01-19 08:33:19,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.652738336713996 [2022-01-19 08:33:19,557 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1609 transitions. [2022-01-19 08:33:19,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1609 transitions. [2022-01-19 08:33:19,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:19,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1609 transitions. [2022-01-19 08:33:19,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:19,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:19,561 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:19,561 INFO L186 Difference]: Start difference. First operand has 206 places, 180 transitions, 941 flow. Second operand 17 states and 1609 transitions. [2022-01-19 08:33:19,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 207 transitions, 1403 flow [2022-01-19 08:33:19,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 207 transitions, 1311 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-01-19 08:33:19,569 INFO L242 Difference]: Finished difference. Result has 210 places, 182 transitions, 982 flow [2022-01-19 08:33:19,570 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=982, PETRI_PLACES=210, PETRI_TRANSITIONS=182} [2022-01-19 08:33:19,570 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 80 predicate places. [2022-01-19 08:33:19,570 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 182 transitions, 982 flow [2022-01-19 08:33:19,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:19,571 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:19,571 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:19,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-19 08:33:19,571 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:19,571 INFO L85 PathProgramCache]: Analyzing trace with hash 789017708, now seen corresponding path program 12 times [2022-01-19 08:33:19,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:19,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568789451] [2022-01-19 08:33:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:19,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:19,816 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 08:33:19,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:19,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568789451] [2022-01-19 08:33:19,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568789451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:19,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:19,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:19,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759807193] [2022-01-19 08:33:19,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:19,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:19,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:19,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:19,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:19,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 182 transitions, 982 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:19,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:19,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:19,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:20,104 INFO L129 PetriNetUnfolder]: 160/599 cut-off events. [2022-01-19 08:33:20,104 INFO L130 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2022-01-19 08:33:20,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2052 conditions, 599 events. 160/599 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3267 event pairs, 79 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 2014. Up to 289 conditions per place. [2022-01-19 08:33:20,108 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 35 changer transitions 7/207 dead transitions. [2022-01-19 08:33:20,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 207 transitions, 1461 flow [2022-01-19 08:33:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:33:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:33:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-01-19 08:33:20,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-01-19 08:33:20,110 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-01-19 08:33:20,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-01-19 08:33:20,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:20,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-01-19 08:33:20,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,114 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,114 INFO L186 Difference]: Start difference. First operand has 210 places, 182 transitions, 982 flow. Second operand 16 states and 1516 transitions. [2022-01-19 08:33:20,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 207 transitions, 1461 flow [2022-01-19 08:33:20,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 207 transitions, 1330 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-01-19 08:33:20,122 INFO L242 Difference]: Finished difference. Result has 212 places, 184 transitions, 987 flow [2022-01-19 08:33:20,123 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=987, PETRI_PLACES=212, PETRI_TRANSITIONS=184} [2022-01-19 08:33:20,123 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 82 predicate places. [2022-01-19 08:33:20,123 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 184 transitions, 987 flow [2022-01-19 08:33:20,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:20,124 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:20,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-19 08:33:20,124 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1447154114, now seen corresponding path program 13 times [2022-01-19 08:33:20,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:20,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896379817] [2022-01-19 08:33:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:20,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:20,377 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 08:33:20,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896379817] [2022-01-19 08:33:20,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896379817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:20,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:20,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-19 08:33:20,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553212078] [2022-01-19 08:33:20,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:20,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:33:20,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:33:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:33:20,379 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-01-19 08:33:20,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 184 transitions, 987 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:20,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-01-19 08:33:20,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:20,649 INFO L129 PetriNetUnfolder]: 163/605 cut-off events. [2022-01-19 08:33:20,649 INFO L130 PetriNetUnfolder]: For 2717/2717 co-relation queries the response was YES. [2022-01-19 08:33:20,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 605 events. 163/605 cut-off events. For 2717/2717 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3292 event pairs, 82 based on Foata normal form. 1/592 useless extension candidates. Maximal degree in co-relation 2022. Up to 289 conditions per place. [2022-01-19 08:33:20,653 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 87 selfloop transitions, 36 changer transitions 6/209 dead transitions. [2022-01-19 08:33:20,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 209 transitions, 1453 flow [2022-01-19 08:33:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:33:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:33:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1518 transitions. [2022-01-19 08:33:20,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6543103448275862 [2022-01-19 08:33:20,655 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1518 transitions. [2022-01-19 08:33:20,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1518 transitions. [2022-01-19 08:33:20,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:20,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1518 transitions. [2022-01-19 08:33:20,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.875) internal successors, (1518), 16 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,659 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,659 INFO L186 Difference]: Start difference. First operand has 212 places, 184 transitions, 987 flow. Second operand 16 states and 1518 transitions. [2022-01-19 08:33:20,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 209 transitions, 1453 flow [2022-01-19 08:33:20,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 209 transitions, 1366 flow, removed 15 selfloop flow, removed 12 redundant places. [2022-01-19 08:33:20,668 INFO L242 Difference]: Finished difference. Result has 215 places, 185 transitions, 1012 flow [2022-01-19 08:33:20,669 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1012, PETRI_PLACES=215, PETRI_TRANSITIONS=185} [2022-01-19 08:33:20,669 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 85 predicate places. [2022-01-19 08:33:20,669 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 185 transitions, 1012 flow [2022-01-19 08:33:20,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:20,670 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:20,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:20,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-19 08:33:20,670 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:20,670 INFO L85 PathProgramCache]: Analyzing trace with hash -414570916, now seen corresponding path program 1 times [2022-01-19 08:33:20,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:20,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208434648] [2022-01-19 08:33:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:20,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:20,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208434648] [2022-01-19 08:33:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208434648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:33:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864794923] [2022-01-19 08:33:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:20,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:20,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:20,805 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 08:33:20,830 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 08:33:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:33:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:33:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:21,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:33:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:21,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864794923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:33:21,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:33:21,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-01-19 08:33:21,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211190989] [2022-01-19 08:33:21,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:33:21,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-19 08:33:21,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:21,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-19 08:33:21,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-01-19 08:33:21,951 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 145 [2022-01-19 08:33:21,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 185 transitions, 1012 flow. Second operand has 29 states, 29 states have (on average 112.27586206896552) internal successors, (3256), 29 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:21,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:21,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 145 [2022-01-19 08:33:21,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:22,432 INFO L129 PetriNetUnfolder]: 86/740 cut-off events. [2022-01-19 08:33:22,432 INFO L130 PetriNetUnfolder]: For 5310/5429 co-relation queries the response was YES. [2022-01-19 08:33:22,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 740 events. 86/740 cut-off events. For 5310/5429 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4972 event pairs, 12 based on Foata normal form. 72/804 useless extension candidates. Maximal degree in co-relation 2213. Up to 81 conditions per place. [2022-01-19 08:33:22,437 INFO L132 encePairwiseOnDemand]: 129/145 looper letters, 48 selfloop transitions, 21 changer transitions 3/214 dead transitions. [2022-01-19 08:33:22,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 214 transitions, 1272 flow [2022-01-19 08:33:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 08:33:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 08:33:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1928 transitions. [2022-01-19 08:33:22,439 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7821501014198783 [2022-01-19 08:33:22,439 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1928 transitions. [2022-01-19 08:33:22,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1928 transitions. [2022-01-19 08:33:22,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:22,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1928 transitions. [2022-01-19 08:33:22,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 113.41176470588235) internal successors, (1928), 17 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:22,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:22,443 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:22,443 INFO L186 Difference]: Start difference. First operand has 215 places, 185 transitions, 1012 flow. Second operand 17 states and 1928 transitions. [2022-01-19 08:33:22,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 214 transitions, 1272 flow [2022-01-19 08:33:22,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 214 transitions, 1174 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-01-19 08:33:22,452 INFO L242 Difference]: Finished difference. Result has 221 places, 194 transitions, 1075 flow [2022-01-19 08:33:22,452 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1075, PETRI_PLACES=221, PETRI_TRANSITIONS=194} [2022-01-19 08:33:22,453 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 91 predicate places. [2022-01-19 08:33:22,453 INFO L470 AbstractCegarLoop]: Abstraction has has 221 places, 194 transitions, 1075 flow [2022-01-19 08:33:22,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.27586206896552) internal successors, (3256), 29 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:22,454 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:22,454 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:22,473 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 08:33:22,670 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,SelfDestructingSolverStorable15 [2022-01-19 08:33:22,670 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:22,671 INFO L85 PathProgramCache]: Analyzing trace with hash -354062317, now seen corresponding path program 1 times [2022-01-19 08:33:22,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:22,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876839253] [2022-01-19 08:33:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:22,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:22,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:22,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876839253] [2022-01-19 08:33:22,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876839253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:33:22,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874949842] [2022-01-19 08:33:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:22,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:22,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:22,727 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 08:33:22,728 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 08:33:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:33:22,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:33:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:23,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:33:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:23,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874949842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:33:23,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:33:23,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:33:23,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916315335] [2022-01-19 08:33:23,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:33:23,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:33:23,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:33:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:33:23,327 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2022-01-19 08:33:23,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 194 transitions, 1075 flow. Second operand has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:23,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2022-01-19 08:33:23,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:23,505 INFO L129 PetriNetUnfolder]: 65/479 cut-off events. [2022-01-19 08:33:23,505 INFO L130 PetriNetUnfolder]: For 3730/3762 co-relation queries the response was YES. [2022-01-19 08:33:23,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1575 conditions, 479 events. 65/479 cut-off events. For 3730/3762 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2227 event pairs, 11 based on Foata normal form. 26/498 useless extension candidates. Maximal degree in co-relation 1532. Up to 91 conditions per place. [2022-01-19 08:33:23,509 INFO L132 encePairwiseOnDemand]: 133/145 looper letters, 38 selfloop transitions, 11 changer transitions 6/199 dead transitions. [2022-01-19 08:33:23,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 199 transitions, 1190 flow [2022-01-19 08:33:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 08:33:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 08:33:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2022-01-19 08:33:23,510 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-01-19 08:33:23,510 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2022-01-19 08:33:23,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2022-01-19 08:33:23,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:23,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2022-01-19 08:33:23,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,513 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,513 INFO L186 Difference]: Start difference. First operand has 221 places, 194 transitions, 1075 flow. Second operand 12 states and 1385 transitions. [2022-01-19 08:33:23,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 199 transitions, 1190 flow [2022-01-19 08:33:23,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 199 transitions, 1111 flow, removed 30 selfloop flow, removed 8 redundant places. [2022-01-19 08:33:23,523 INFO L242 Difference]: Finished difference. Result has 224 places, 189 transitions, 989 flow [2022-01-19 08:33:23,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=989, PETRI_PLACES=224, PETRI_TRANSITIONS=189} [2022-01-19 08:33:23,524 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 94 predicate places. [2022-01-19 08:33:23,524 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 189 transitions, 989 flow [2022-01-19 08:33:23,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:23,524 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:23,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 08:33:23,743 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,SelfDestructingSolverStorable16 [2022-01-19 08:33:23,744 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:23,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2063615823, now seen corresponding path program 2 times [2022-01-19 08:33:23,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:23,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713138954] [2022-01-19 08:33:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:23,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:33:23,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:23,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713138954] [2022-01-19 08:33:23,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713138954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:33:23,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:33:23,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 08:33:23,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498622281] [2022-01-19 08:33:23,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:33:23,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 08:33:23,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 08:33:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-19 08:33:23,791 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2022-01-19 08:33:23,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 189 transitions, 989 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:23,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2022-01-19 08:33:23,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:23,850 INFO L129 PetriNetUnfolder]: 42/488 cut-off events. [2022-01-19 08:33:23,850 INFO L130 PetriNetUnfolder]: For 3973/4056 co-relation queries the response was YES. [2022-01-19 08:33:23,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 488 events. 42/488 cut-off events. For 3973/4056 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2559 event pairs, 7 based on Foata normal form. 49/530 useless extension candidates. Maximal degree in co-relation 1417. Up to 47 conditions per place. [2022-01-19 08:33:23,853 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 16 selfloop transitions, 7 changer transitions 36/185 dead transitions. [2022-01-19 08:33:23,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 185 transitions, 1034 flow [2022-01-19 08:33:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 08:33:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 08:33:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2022-01-19 08:33:23,854 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9017241379310345 [2022-01-19 08:33:23,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2022-01-19 08:33:23,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2022-01-19 08:33:23,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:23,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2022-01-19 08:33:23,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,855 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,855 INFO L186 Difference]: Start difference. First operand has 224 places, 189 transitions, 989 flow. Second operand 4 states and 523 transitions. [2022-01-19 08:33:23,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 185 transitions, 1034 flow [2022-01-19 08:33:23,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 185 transitions, 957 flow, removed 16 selfloop flow, removed 17 redundant places. [2022-01-19 08:33:23,863 INFO L242 Difference]: Finished difference. Result has 207 places, 143 transitions, 573 flow [2022-01-19 08:33:23,863 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=573, PETRI_PLACES=207, PETRI_TRANSITIONS=143} [2022-01-19 08:33:23,863 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 77 predicate places. [2022-01-19 08:33:23,863 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 143 transitions, 573 flow [2022-01-19 08:33:23,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:23,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:23,864 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:23,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-19 08:33:23,864 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash -135091148, now seen corresponding path program 2 times [2022-01-19 08:33:23,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572652775] [2022-01-19 08:33:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:23,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:24,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572652775] [2022-01-19 08:33:24,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572652775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:33:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659389083] [2022-01-19 08:33:24,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:33:24,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:24,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:24,548 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 08:33:24,549 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 08:33:24,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:33:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:33:24,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-19 08:33:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:33:24,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:33:24,882 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 08:33:24,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 08:33:25,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:33:25,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:33:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:25,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:33:26,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:33:26,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-01-19 08:33:26,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-19 08:33:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:27,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659389083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:33:27,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:33:27,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 64 [2022-01-19 08:33:27,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439689496] [2022-01-19 08:33:27,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:33:27,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-19 08:33:27,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-19 08:33:27,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3720, Unknown=1, NotChecked=0, Total=4032 [2022-01-19 08:33:27,299 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2022-01-19 08:33:27,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 143 transitions, 573 flow. Second operand has 64 states, 64 states have (on average 58.0625) internal successors, (3716), 64 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:27,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:27,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2022-01-19 08:33:27,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:35,622 INFO L129 PetriNetUnfolder]: 2948/7104 cut-off events. [2022-01-19 08:33:35,622 INFO L130 PetriNetUnfolder]: For 64846/64848 co-relation queries the response was YES. [2022-01-19 08:33:35,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25156 conditions, 7104 events. 2948/7104 cut-off events. For 64846/64848 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 60789 event pairs, 392 based on Foata normal form. 238/7202 useless extension candidates. Maximal degree in co-relation 25117. Up to 963 conditions per place. [2022-01-19 08:33:35,675 INFO L132 encePairwiseOnDemand]: 113/145 looper letters, 459 selfloop transitions, 202 changer transitions 0/714 dead transitions. [2022-01-19 08:33:35,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 714 transitions, 5245 flow [2022-01-19 08:33:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-19 08:33:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-01-19 08:33:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4768 transitions. [2022-01-19 08:33:35,683 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4326678765880218 [2022-01-19 08:33:35,683 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4768 transitions. [2022-01-19 08:33:35,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4768 transitions. [2022-01-19 08:33:35,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:35,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4768 transitions. [2022-01-19 08:33:35,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 62.73684210526316) internal successors, (4768), 76 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:35,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 145.0) internal successors, (11165), 77 states have internal predecessors, (11165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:35,703 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 145.0) internal successors, (11165), 77 states have internal predecessors, (11165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:35,703 INFO L186 Difference]: Start difference. First operand has 207 places, 143 transitions, 573 flow. Second operand 76 states and 4768 transitions. [2022-01-19 08:33:35,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 714 transitions, 5245 flow [2022-01-19 08:33:35,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 714 transitions, 3912 flow, removed 649 selfloop flow, removed 23 redundant places. [2022-01-19 08:33:35,747 INFO L242 Difference]: Finished difference. Result has 266 places, 353 transitions, 2479 flow [2022-01-19 08:33:35,747 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=2479, PETRI_PLACES=266, PETRI_TRANSITIONS=353} [2022-01-19 08:33:35,747 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 136 predicate places. [2022-01-19 08:33:35,747 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 353 transitions, 2479 flow [2022-01-19 08:33:35,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 58.0625) internal successors, (3716), 64 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:35,748 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:35,748 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:35,769 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 08:33:35,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:35,967 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1719990396, now seen corresponding path program 1 times [2022-01-19 08:33:35,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:35,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183118314] [2022-01-19 08:33:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:35,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:37,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183118314] [2022-01-19 08:33:37,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183118314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:33:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853290843] [2022-01-19 08:33:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:37,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:37,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:37,253 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 08:33:37,254 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 08:33:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:37,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-19 08:33:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:33:39,091 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 08:33:39,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 08:33:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:39,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:33:40,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:33:40,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-19 08:33:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:42,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853290843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:33:42,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:33:42,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 89 [2022-01-19 08:33:42,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386110019] [2022-01-19 08:33:42,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:33:42,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-19 08:33:42,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-19 08:33:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=7138, Unknown=0, NotChecked=0, Total=7832 [2022-01-19 08:33:42,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:33:42,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 353 transitions, 2479 flow. Second operand has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:42,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:42,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:33:42,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:48,234 INFO L129 PetriNetUnfolder]: 5628/11566 cut-off events. [2022-01-19 08:33:48,234 INFO L130 PetriNetUnfolder]: For 75684/75688 co-relation queries the response was YES. [2022-01-19 08:33:48,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44100 conditions, 11566 events. 5628/11566 cut-off events. For 75684/75688 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 97595 event pairs, 2006 based on Foata normal form. 7/11519 useless extension candidates. Maximal degree in co-relation 44043. Up to 8040 conditions per place. [2022-01-19 08:33:48,319 INFO L132 encePairwiseOnDemand]: 105/145 looper letters, 426 selfloop transitions, 297 changer transitions 16/785 dead transitions. [2022-01-19 08:33:48,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 785 transitions, 7157 flow [2022-01-19 08:33:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-19 08:33:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-01-19 08:33:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4467 transitions. [2022-01-19 08:33:48,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42201228153046766 [2022-01-19 08:33:48,382 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4467 transitions. [2022-01-19 08:33:48,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4467 transitions. [2022-01-19 08:33:48,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:48,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4467 transitions. [2022-01-19 08:33:48,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 61.19178082191781) internal successors, (4467), 73 states have internal predecessors, (4467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:48,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 145.0) internal successors, (10730), 74 states have internal predecessors, (10730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:48,403 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 145.0) internal successors, (10730), 74 states have internal predecessors, (10730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:48,403 INFO L186 Difference]: Start difference. First operand has 266 places, 353 transitions, 2479 flow. Second operand 73 states and 4467 transitions. [2022-01-19 08:33:48,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 785 transitions, 7157 flow [2022-01-19 08:33:48,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 785 transitions, 6493 flow, removed 315 selfloop flow, removed 14 redundant places. [2022-01-19 08:33:48,641 INFO L242 Difference]: Finished difference. Result has 350 places, 613 transitions, 5191 flow [2022-01-19 08:33:48,641 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=5191, PETRI_PLACES=350, PETRI_TRANSITIONS=613} [2022-01-19 08:33:48,642 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 220 predicate places. [2022-01-19 08:33:48,642 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 613 transitions, 5191 flow [2022-01-19 08:33:48,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:48,643 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:48,643 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:33:48,662 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 08:33:48,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:48,848 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 997418424, now seen corresponding path program 2 times [2022-01-19 08:33:48,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:48,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932910864] [2022-01-19 08:33:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:48,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:50,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932910864] [2022-01-19 08:33:50,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932910864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:33:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440772034] [2022-01-19 08:33:50,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:33:50,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:50,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:50,087 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 08:33:50,088 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 08:33:50,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:33:50,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:33:50,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-19 08:33:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:33:51,979 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 08:33:51,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 08:33:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:52,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:33:53,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:33:53,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-19 08:33:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:33:55,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440772034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:33:55,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:33:55,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 89 [2022-01-19 08:33:55,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672357600] [2022-01-19 08:33:55,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:33:55,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-19 08:33:55,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-19 08:33:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=7138, Unknown=0, NotChecked=0, Total=7832 [2022-01-19 08:33:55,195 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:33:55,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 613 transitions, 5191 flow. Second operand has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:33:55,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:55,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:33:55,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:34:02,713 INFO L129 PetriNetUnfolder]: 6255/12850 cut-off events. [2022-01-19 08:34:02,713 INFO L130 PetriNetUnfolder]: For 291445/291491 co-relation queries the response was YES. [2022-01-19 08:34:02,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82772 conditions, 12850 events. 6255/12850 cut-off events. For 291445/291491 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 109442 event pairs, 2108 based on Foata normal form. 39/12832 useless extension candidates. Maximal degree in co-relation 82689. Up to 8718 conditions per place. [2022-01-19 08:34:02,847 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 543 selfloop transitions, 366 changer transitions 16/971 dead transitions. [2022-01-19 08:34:02,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 971 transitions, 11107 flow [2022-01-19 08:34:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 08:34:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 08:34:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4576 transitions. [2022-01-19 08:34:02,930 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4207816091954023 [2022-01-19 08:34:02,930 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4576 transitions. [2022-01-19 08:34:02,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4576 transitions. [2022-01-19 08:34:02,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:34:02,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4576 transitions. [2022-01-19 08:34:02,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 61.013333333333335) internal successors, (4576), 75 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:02,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 145.0) internal successors, (11020), 76 states have internal predecessors, (11020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:02,952 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 145.0) internal successors, (11020), 76 states have internal predecessors, (11020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:02,952 INFO L186 Difference]: Start difference. First operand has 350 places, 613 transitions, 5191 flow. Second operand 75 states and 4576 transitions. [2022-01-19 08:34:02,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 971 transitions, 11107 flow [2022-01-19 08:34:03,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 971 transitions, 10802 flow, removed 126 selfloop flow, removed 30 redundant places. [2022-01-19 08:34:03,561 INFO L242 Difference]: Finished difference. Result has 413 places, 801 transitions, 8209 flow [2022-01-19 08:34:03,562 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=8209, PETRI_PLACES=413, PETRI_TRANSITIONS=801} [2022-01-19 08:34:03,562 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 283 predicate places. [2022-01-19 08:34:03,562 INFO L470 AbstractCegarLoop]: Abstraction has has 413 places, 801 transitions, 8209 flow [2022-01-19 08:34:03,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:03,563 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:34:03,563 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:34:03,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-19 08:34:03,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:34:03,767 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:34:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:34:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash -574762340, now seen corresponding path program 3 times [2022-01-19 08:34:03,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:34:03,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124351890] [2022-01-19 08:34:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:34:03,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:34:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:34:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:34:04,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:34:04,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124351890] [2022-01-19 08:34:04,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124351890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:34:04,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240058936] [2022-01-19 08:34:04,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:34:04,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:34:04,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:34:04,938 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 08:34:04,938 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 08:34:05,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:34:05,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:34:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-19 08:34:05,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:34:06,131 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:34:06,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-19 08:34:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:34:06,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:34:07,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:34:07,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-19 08:34:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:34:08,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240058936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:34:08,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:34:08,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22, 22] total 71 [2022-01-19 08:34:08,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073677644] [2022-01-19 08:34:08,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:34:08,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-19 08:34:08,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:34:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-19 08:34:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=4637, Unknown=0, NotChecked=0, Total=4970 [2022-01-19 08:34:08,207 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:34:08,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 801 transitions, 8209 flow. Second operand has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:08,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:34:08,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:34:08,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:34:20,299 INFO L129 PetriNetUnfolder]: 7177/14806 cut-off events. [2022-01-19 08:34:20,299 INFO L130 PetriNetUnfolder]: For 718508/718608 co-relation queries the response was YES. [2022-01-19 08:34:20,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122391 conditions, 14806 events. 7177/14806 cut-off events. For 718508/718608 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 128324 event pairs, 1867 based on Foata normal form. 62/14805 useless extension candidates. Maximal degree in co-relation 122290. Up to 9533 conditions per place. [2022-01-19 08:34:20,484 INFO L132 encePairwiseOnDemand]: 108/145 looper letters, 721 selfloop transitions, 438 changer transitions 16/1221 dead transitions. [2022-01-19 08:34:20,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1221 transitions, 15912 flow [2022-01-19 08:34:20,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 08:34:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 08:34:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3641 transitions. [2022-01-19 08:34:20,490 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4255990648743425 [2022-01-19 08:34:20,490 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3641 transitions. [2022-01-19 08:34:20,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3641 transitions. [2022-01-19 08:34:20,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:34:20,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3641 transitions. [2022-01-19 08:34:20,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.71186440677966) internal successors, (3641), 59 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:20,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 145.0) internal successors, (8700), 60 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:20,499 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 145.0) internal successors, (8700), 60 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:20,500 INFO L186 Difference]: Start difference. First operand has 413 places, 801 transitions, 8209 flow. Second operand 59 states and 3641 transitions. [2022-01-19 08:34:20,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1221 transitions, 15912 flow [2022-01-19 08:34:21,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1221 transitions, 15269 flow, removed 274 selfloop flow, removed 34 redundant places. [2022-01-19 08:34:21,539 INFO L242 Difference]: Finished difference. Result has 448 places, 983 transitions, 11271 flow [2022-01-19 08:34:21,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=11271, PETRI_PLACES=448, PETRI_TRANSITIONS=983} [2022-01-19 08:34:21,540 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 318 predicate places. [2022-01-19 08:34:21,540 INFO L470 AbstractCegarLoop]: Abstraction has has 448 places, 983 transitions, 11271 flow [2022-01-19 08:34:21,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:21,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:34:21,541 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:34:21,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 08:34:21,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:34:21,744 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:34:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:34:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 807462638, now seen corresponding path program 4 times [2022-01-19 08:34:21,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:34:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131523030] [2022-01-19 08:34:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:34:21,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:34:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:34:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:34:23,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:34:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131523030] [2022-01-19 08:34:23,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131523030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:34:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439343150] [2022-01-19 08:34:23,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:34:23,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:34:23,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:34:23,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:34:23,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 08:34:23,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:34:23,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:34:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-19 08:34:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:34:24,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:34:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:34:25,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:34:26,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:34:26,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-19 08:34:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:34:28,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439343150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:34:28,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:34:28,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31, 31] total 94 [2022-01-19 08:34:28,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618074564] [2022-01-19 08:34:28,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:34:28,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-19 08:34:28,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:34:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-19 08:34:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=8054, Unknown=0, NotChecked=0, Total=8742 [2022-01-19 08:34:28,794 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 145 [2022-01-19 08:34:28,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 983 transitions, 11271 flow. Second operand has 94 states, 94 states have (on average 51.47872340425532) internal successors, (4839), 94 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:28,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:34:28,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 145 [2022-01-19 08:34:28,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:34:41,505 INFO L129 PetriNetUnfolder]: 8756/17916 cut-off events. [2022-01-19 08:34:41,505 INFO L130 PetriNetUnfolder]: For 1207911/1208046 co-relation queries the response was YES. [2022-01-19 08:34:41,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169742 conditions, 17916 events. 8756/17916 cut-off events. For 1207911/1208046 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 160179 event pairs, 1909 based on Foata normal form. 77/17904 useless extension candidates. Maximal degree in co-relation 169629. Up to 9117 conditions per place. [2022-01-19 08:34:41,816 INFO L132 encePairwiseOnDemand]: 102/145 looper letters, 850 selfloop transitions, 935 changer transitions 22/1850 dead transitions. [2022-01-19 08:34:41,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1850 transitions, 28622 flow [2022-01-19 08:34:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-19 08:34:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-01-19 08:34:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5382 transitions. [2022-01-19 08:34:41,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3749216300940439 [2022-01-19 08:34:41,822 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5382 transitions. [2022-01-19 08:34:41,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5382 transitions. [2022-01-19 08:34:41,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:34:41,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5382 transitions. [2022-01-19 08:34:41,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 54.36363636363637) internal successors, (5382), 99 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:41,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 145.0) internal successors, (14500), 100 states have internal predecessors, (14500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:41,839 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 145.0) internal successors, (14500), 100 states have internal predecessors, (14500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:41,839 INFO L186 Difference]: Start difference. First operand has 448 places, 983 transitions, 11271 flow. Second operand 99 states and 5382 transitions. [2022-01-19 08:34:41,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1850 transitions, 28622 flow [2022-01-19 08:34:45,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1850 transitions, 27276 flow, removed 612 selfloop flow, removed 32 redundant places. [2022-01-19 08:34:45,065 INFO L242 Difference]: Finished difference. Result has 554 places, 1504 transitions, 21120 flow [2022-01-19 08:34:45,066 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=10739, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=21120, PETRI_PLACES=554, PETRI_TRANSITIONS=1504} [2022-01-19 08:34:45,066 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 424 predicate places. [2022-01-19 08:34:45,066 INFO L470 AbstractCegarLoop]: Abstraction has has 554 places, 1504 transitions, 21120 flow [2022-01-19 08:34:45,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 51.47872340425532) internal successors, (4839), 94 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:45,067 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:34:45,067 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:34:45,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-19 08:34:45,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:34:45,283 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:34:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:34:45,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1680292900, now seen corresponding path program 5 times [2022-01-19 08:34:45,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:34:45,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783361860] [2022-01-19 08:34:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:34:45,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:34:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:34:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:34:46,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:34:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783361860] [2022-01-19 08:34:46,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783361860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:34:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247223428] [2022-01-19 08:34:46,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:34:46,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:34:46,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:34:46,371 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:34:46,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 08:34:46,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:34:46,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:34:46,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-19 08:34:46,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:34:47,444 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:34:47,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-19 08:34:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:34:47,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:34:48,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:34:48,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2022-01-19 08:34:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:34:55,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247223428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:34:55,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:34:55,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 23, 20] total 70 [2022-01-19 08:34:55,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736760511] [2022-01-19 08:34:55,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:34:55,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-19 08:34:55,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:34:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-19 08:34:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=4470, Unknown=0, NotChecked=0, Total=4830 [2022-01-19 08:34:55,807 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:34:55,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 1504 transitions, 21120 flow. Second operand has 70 states, 70 states have (on average 59.01428571428571) internal successors, (4131), 70 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:34:55,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:34:55,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:34:55,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:35:09,882 INFO L129 PetriNetUnfolder]: 9413/19482 cut-off events. [2022-01-19 08:35:09,882 INFO L130 PetriNetUnfolder]: For 1299338/1299488 co-relation queries the response was YES. [2022-01-19 08:35:10,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197291 conditions, 19482 events. 9413/19482 cut-off events. For 1299338/1299488 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 178281 event pairs, 2323 based on Foata normal form. 78/19447 useless extension candidates. Maximal degree in co-relation 197138. Up to 11701 conditions per place. [2022-01-19 08:35:10,247 INFO L132 encePairwiseOnDemand]: 107/145 looper letters, 1084 selfloop transitions, 946 changer transitions 37/2113 dead transitions. [2022-01-19 08:35:10,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 2113 transitions, 35785 flow [2022-01-19 08:35:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-19 08:35:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-01-19 08:35:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 5326 transitions. [2022-01-19 08:35:10,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4221957986523979 [2022-01-19 08:35:10,251 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 5326 transitions. [2022-01-19 08:35:10,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 5326 transitions. [2022-01-19 08:35:10,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:35:10,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 5326 transitions. [2022-01-19 08:35:10,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 61.2183908045977) internal successors, (5326), 87 states have internal predecessors, (5326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:10,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 145.0) internal successors, (12760), 88 states have internal predecessors, (12760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:10,263 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 145.0) internal successors, (12760), 88 states have internal predecessors, (12760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:10,263 INFO L186 Difference]: Start difference. First operand has 554 places, 1504 transitions, 21120 flow. Second operand 87 states and 5326 transitions. [2022-01-19 08:35:10,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 2113 transitions, 35785 flow [2022-01-19 08:35:14,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 2113 transitions, 34366 flow, removed 671 selfloop flow, removed 35 redundant places. [2022-01-19 08:35:14,228 INFO L242 Difference]: Finished difference. Result has 632 places, 1860 transitions, 29495 flow [2022-01-19 08:35:14,229 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=20372, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=637, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=29495, PETRI_PLACES=632, PETRI_TRANSITIONS=1860} [2022-01-19 08:35:14,230 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 502 predicate places. [2022-01-19 08:35:14,230 INFO L470 AbstractCegarLoop]: Abstraction has has 632 places, 1860 transitions, 29495 flow [2022-01-19 08:35:14,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 59.01428571428571) internal successors, (4131), 70 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:14,230 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:35:14,230 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:35:14,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 08:35:14,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-19 08:35:14,443 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:35:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:35:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1122991480, now seen corresponding path program 6 times [2022-01-19 08:35:14,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:35:14,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739371833] [2022-01-19 08:35:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:35:14,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:35:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:35:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:35:15,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:35:15,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739371833] [2022-01-19 08:35:15,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739371833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:35:15,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240843453] [2022-01-19 08:35:15,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:35:15,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:35:15,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:35:15,638 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:35:15,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 08:35:15,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:35:15,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:35:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-19 08:35:15,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:35:17,407 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:35:17,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-19 08:35:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:35:17,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:35:18,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:35:18,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-19 08:35:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:35:21,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240843453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:35:21,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:35:21,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 89 [2022-01-19 08:35:21,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038153816] [2022-01-19 08:35:21,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:35:21,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-19 08:35:21,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:35:21,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-19 08:35:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=7139, Unknown=0, NotChecked=0, Total=7832 [2022-01-19 08:35:21,042 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:35:21,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 1860 transitions, 29495 flow. Second operand has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:21,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:35:21,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:35:21,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:35:35,557 INFO L129 PetriNetUnfolder]: 10182/21161 cut-off events. [2022-01-19 08:35:35,557 INFO L130 PetriNetUnfolder]: For 1479276/1479448 co-relation queries the response was YES. [2022-01-19 08:35:35,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224110 conditions, 21161 events. 10182/21161 cut-off events. For 1479276/1479448 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 196394 event pairs, 2444 based on Foata normal form. 87/21134 useless extension candidates. Maximal degree in co-relation 223930. Up to 11946 conditions per place. [2022-01-19 08:35:36,170 INFO L132 encePairwiseOnDemand]: 105/145 looper letters, 1158 selfloop transitions, 1182 changer transitions 14/2400 dead transitions. [2022-01-19 08:35:36,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 2400 transitions, 44182 flow [2022-01-19 08:35:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-19 08:35:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-01-19 08:35:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4549 transitions. [2022-01-19 08:35:36,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42395153774464117 [2022-01-19 08:35:36,174 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4549 transitions. [2022-01-19 08:35:36,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4549 transitions. [2022-01-19 08:35:36,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:35:36,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4549 transitions. [2022-01-19 08:35:36,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 61.472972972972975) internal successors, (4549), 74 states have internal predecessors, (4549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:36,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 145.0) internal successors, (10875), 75 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:36,185 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 145.0) internal successors, (10875), 75 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:36,185 INFO L186 Difference]: Start difference. First operand has 632 places, 1860 transitions, 29495 flow. Second operand 74 states and 4549 transitions. [2022-01-19 08:35:36,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 2400 transitions, 44182 flow [2022-01-19 08:35:41,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 659 places, 2400 transitions, 42850 flow, removed 633 selfloop flow, removed 35 redundant places. [2022-01-19 08:35:41,248 INFO L242 Difference]: Finished difference. Result has 687 places, 2164 transitions, 38543 flow [2022-01-19 08:35:41,249 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=28683, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=38543, PETRI_PLACES=687, PETRI_TRANSITIONS=2164} [2022-01-19 08:35:41,250 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 557 predicate places. [2022-01-19 08:35:41,250 INFO L470 AbstractCegarLoop]: Abstraction has has 687 places, 2164 transitions, 38543 flow [2022-01-19 08:35:41,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:41,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:35:41,251 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:35:41,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 08:35:41,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-19 08:35:41,451 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:35:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:35:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1061004508, now seen corresponding path program 7 times [2022-01-19 08:35:41,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:35:41,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974886981] [2022-01-19 08:35:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:35:41,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:35:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:35:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:35:42,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:35:42,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974886981] [2022-01-19 08:35:42,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974886981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:35:42,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109201203] [2022-01-19 08:35:42,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:35:42,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:35:42,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:35:42,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:35:42,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 08:35:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:35:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-19 08:35:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:35:44,295 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 08:35:44,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 08:35:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:35:44,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:35:45,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:35:45,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2022-01-19 08:35:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:35:49,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109201203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:35:49,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:35:49,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 29] total 87 [2022-01-19 08:35:49,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926792326] [2022-01-19 08:35:49,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:35:49,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-19 08:35:49,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:35:49,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-19 08:35:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=6780, Unknown=0, NotChecked=0, Total=7482 [2022-01-19 08:35:49,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:35:49,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 2164 transitions, 38543 flow. Second operand has 87 states, 87 states have (on average 58.54022988505747) internal successors, (5093), 87 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:35:49,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:35:49,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:35:49,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:36:07,497 INFO L129 PetriNetUnfolder]: 10926/22740 cut-off events. [2022-01-19 08:36:07,497 INFO L130 PetriNetUnfolder]: For 1829286/1829460 co-relation queries the response was YES. [2022-01-19 08:36:07,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258297 conditions, 22740 events. 10926/22740 cut-off events. For 1829286/1829460 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 214957 event pairs, 2326 based on Foata normal form. 95/22722 useless extension candidates. Maximal degree in co-relation 258101. Up to 9708 conditions per place. [2022-01-19 08:36:08,071 INFO L132 encePairwiseOnDemand]: 108/145 looper letters, 887 selfloop transitions, 1681 changer transitions 20/2634 dead transitions. [2022-01-19 08:36:08,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 2634 transitions, 53412 flow [2022-01-19 08:36:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-19 08:36:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-01-19 08:36:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4448 transitions. [2022-01-19 08:36:08,075 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42605363984674327 [2022-01-19 08:36:08,075 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4448 transitions. [2022-01-19 08:36:08,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4448 transitions. [2022-01-19 08:36:08,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:36:08,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4448 transitions. [2022-01-19 08:36:08,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.77777777777778) internal successors, (4448), 72 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:08,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 145.0) internal successors, (10585), 73 states have internal predecessors, (10585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:08,089 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 145.0) internal successors, (10585), 73 states have internal predecessors, (10585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:08,089 INFO L186 Difference]: Start difference. First operand has 687 places, 2164 transitions, 38543 flow. Second operand 72 states and 4448 transitions. [2022-01-19 08:36:08,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 2634 transitions, 53412 flow [2022-01-19 08:36:14,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 2634 transitions, 52165 flow, removed 476 selfloop flow, removed 33 redundant places. [2022-01-19 08:36:15,032 INFO L242 Difference]: Finished difference. Result has 746 places, 2360 transitions, 46886 flow [2022-01-19 08:36:15,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=37494, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=46886, PETRI_PLACES=746, PETRI_TRANSITIONS=2360} [2022-01-19 08:36:15,034 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 616 predicate places. [2022-01-19 08:36:15,034 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 2360 transitions, 46886 flow [2022-01-19 08:36:15,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 58.54022988505747) internal successors, (5093), 87 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:15,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:36:15,035 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:36:15,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 08:36:15,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 08:36:15,239 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:36:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:36:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1985595090, now seen corresponding path program 8 times [2022-01-19 08:36:15,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:36:15,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859036546] [2022-01-19 08:36:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:36:15,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:36:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:36:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:36:16,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:36:16,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859036546] [2022-01-19 08:36:16,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859036546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:36:16,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612595050] [2022-01-19 08:36:16,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:36:16,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:36:16,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:36:16,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:36:16,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 08:36:16,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:36:16,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:36:16,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-19 08:36:16,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:36:18,121 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:36:18,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-19 08:36:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:36:18,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:36:19,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:36:19,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2022-01-19 08:36:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:36:27,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612595050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:36:27,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:36:27,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 30] total 88 [2022-01-19 08:36:27,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244591109] [2022-01-19 08:36:27,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:36:27,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-19 08:36:27,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:36:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-19 08:36:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=6958, Unknown=0, NotChecked=0, Total=7656 [2022-01-19 08:36:27,296 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:36:27,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 2360 transitions, 46886 flow. Second operand has 88 states, 88 states have (on average 58.51136363636363) internal successors, (5149), 88 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:27,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:36:27,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:36:27,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:36:46,220 INFO L129 PetriNetUnfolder]: 11370/23820 cut-off events. [2022-01-19 08:36:46,221 INFO L130 PetriNetUnfolder]: For 1984213/1984385 co-relation queries the response was YES. [2022-01-19 08:36:46,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283889 conditions, 23820 events. 11370/23820 cut-off events. For 1984213/1984385 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 227713 event pairs, 2755 based on Foata normal form. 84/23763 useless extension candidates. Maximal degree in co-relation 283672. Up to 14929 conditions per place. [2022-01-19 08:36:47,012 INFO L132 encePairwiseOnDemand]: 105/145 looper letters, 1616 selfloop transitions, 1215 changer transitions 19/2896 dead transitions. [2022-01-19 08:36:47,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 2896 transitions, 63656 flow [2022-01-19 08:36:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-19 08:36:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-01-19 08:36:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4491 transitions. [2022-01-19 08:36:47,016 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4242796410014171 [2022-01-19 08:36:47,016 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4491 transitions. [2022-01-19 08:36:47,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4491 transitions. [2022-01-19 08:36:47,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:36:47,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4491 transitions. [2022-01-19 08:36:47,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 61.52054794520548) internal successors, (4491), 73 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:47,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 145.0) internal successors, (10730), 74 states have internal predecessors, (10730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:47,026 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 145.0) internal successors, (10730), 74 states have internal predecessors, (10730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:47,026 INFO L186 Difference]: Start difference. First operand has 746 places, 2360 transitions, 46886 flow. Second operand 73 states and 4491 transitions. [2022-01-19 08:36:47,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 2896 transitions, 63656 flow [2022-01-19 08:36:56,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 2896 transitions, 62535 flow, removed 439 selfloop flow, removed 35 redundant places. [2022-01-19 08:36:56,831 INFO L242 Difference]: Finished difference. Result has 808 places, 2623 transitions, 56236 flow [2022-01-19 08:36:56,833 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=46059, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=954, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=56236, PETRI_PLACES=808, PETRI_TRANSITIONS=2623} [2022-01-19 08:36:56,833 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 678 predicate places. [2022-01-19 08:36:56,833 INFO L470 AbstractCegarLoop]: Abstraction has has 808 places, 2623 transitions, 56236 flow [2022-01-19 08:36:56,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 58.51136363636363) internal successors, (5149), 88 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:36:56,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:36:56,834 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:36:56,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 08:36:57,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 08:36:57,035 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:36:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:36:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1372799682, now seen corresponding path program 9 times [2022-01-19 08:36:57,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:36:57,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049533174] [2022-01-19 08:36:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:36:57,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:36:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:36:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:36:58,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:36:58,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049533174] [2022-01-19 08:36:58,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049533174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:36:58,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403723384] [2022-01-19 08:36:58,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:36:58,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:36:58,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:36:58,207 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:36:58,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 08:36:58,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:36:58,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:36:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-19 08:36:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:36:59,546 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:36:59,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-19 08:36:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:36:59,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:37:00,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:37:00,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-19 08:37:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:37:01,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403723384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:37:01,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:37:01,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22, 22] total 71 [2022-01-19 08:37:01,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987849856] [2022-01-19 08:37:01,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:37:01,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-19 08:37:01,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:37:01,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-19 08:37:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=4637, Unknown=0, NotChecked=0, Total=4970 [2022-01-19 08:37:01,834 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:37:01,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 2623 transitions, 56236 flow. Second operand has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:37:01,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:37:01,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:37:01,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:37:15,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 08:37:27,845 INFO L129 PetriNetUnfolder]: 11546/24297 cut-off events. [2022-01-19 08:37:27,845 INFO L130 PetriNetUnfolder]: For 2586066/2586268 co-relation queries the response was YES. [2022-01-19 08:37:28,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 309553 conditions, 24297 events. 11546/24297 cut-off events. For 2586066/2586268 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 235549 event pairs, 3071 based on Foata normal form. 57/24208 useless extension candidates. Maximal degree in co-relation 309313. Up to 17319 conditions per place. [2022-01-19 08:37:28,895 INFO L132 encePairwiseOnDemand]: 105/145 looper letters, 1960 selfloop transitions, 851 changer transitions 14/2871 dead transitions. [2022-01-19 08:37:28,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 2871 transitions, 67024 flow [2022-01-19 08:37:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-19 08:37:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-01-19 08:37:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3808 transitions. [2022-01-19 08:37:28,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4235817575083426 [2022-01-19 08:37:28,898 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3808 transitions. [2022-01-19 08:37:28,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3808 transitions. [2022-01-19 08:37:28,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:37:28,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3808 transitions. [2022-01-19 08:37:28,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 61.41935483870968) internal successors, (3808), 62 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:37:28,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 145.0) internal successors, (9135), 63 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:37:28,906 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 145.0) internal successors, (9135), 63 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:37:28,906 INFO L186 Difference]: Start difference. First operand has 808 places, 2623 transitions, 56236 flow. Second operand 62 states and 3808 transitions. [2022-01-19 08:37:28,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 2871 transitions, 67024 flow [2022-01-19 08:37:42,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 824 places, 2871 transitions, 66207 flow, removed 307 selfloop flow, removed 38 redundant places. [2022-01-19 08:37:42,233 INFO L242 Difference]: Finished difference. Result has 843 places, 2714 transitions, 60174 flow [2022-01-19 08:37:42,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=55533, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=60174, PETRI_PLACES=843, PETRI_TRANSITIONS=2714} [2022-01-19 08:37:42,236 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 713 predicate places. [2022-01-19 08:37:42,236 INFO L470 AbstractCegarLoop]: Abstraction has has 843 places, 2714 transitions, 60174 flow [2022-01-19 08:37:42,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:37:42,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:37:42,237 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:37:42,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 08:37:42,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 08:37:42,458 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:37:42,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:37:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash -791845072, now seen corresponding path program 10 times [2022-01-19 08:37:42,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:37:42,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844694141] [2022-01-19 08:37:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:37:42,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:37:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:37:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:37:43,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:37:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844694141] [2022-01-19 08:37:43,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844694141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:37:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047763132] [2022-01-19 08:37:43,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:37:43,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:37:43,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:37:43,618 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:37:43,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 08:37:43,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:37:43,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:37:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-19 08:37:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:37:45,321 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 08:37:45,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 08:37:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:37:45,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:37:46,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:37:46,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-01-19 08:37:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:37:50,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047763132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:37:50,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:37:50,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 30] total 88 [2022-01-19 08:37:50,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32842042] [2022-01-19 08:37:50,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:37:50,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-19 08:37:50,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:37:50,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-19 08:37:50,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=6905, Unknown=1, NotChecked=0, Total=7656 [2022-01-19 08:37:50,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:37:50,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 2714 transitions, 60174 flow. Second operand has 88 states, 88 states have (on average 58.51136363636363) internal successors, (5149), 88 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:37:50,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:37:50,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:37:50,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:37:58,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-19 08:37:59,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-19 08:38:39,544 INFO L129 PetriNetUnfolder]: 14492/30077 cut-off events. [2022-01-19 08:38:39,544 INFO L130 PetriNetUnfolder]: For 3245445/3245680 co-relation queries the response was YES. [2022-01-19 08:38:41,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 391474 conditions, 30077 events. 14492/30077 cut-off events. For 3245445/3245680 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 298579 event pairs, 859 based on Foata normal form. 114/30063 useless extension candidates. Maximal degree in co-relation 391222. Up to 10062 conditions per place. [2022-01-19 08:38:41,265 INFO L132 encePairwiseOnDemand]: 106/145 looper letters, 1031 selfloop transitions, 2869 changer transitions 51/3997 dead transitions. [2022-01-19 08:38:41,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 3997 transitions, 98946 flow [2022-01-19 08:38:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-19 08:38:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2022-01-19 08:38:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 8266 transitions. [2022-01-19 08:38:41,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4254246011322697 [2022-01-19 08:38:41,271 INFO L72 ComplementDD]: Start complementDD. Operand 134 states and 8266 transitions. [2022-01-19 08:38:41,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 134 states and 8266 transitions. [2022-01-19 08:38:41,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:38:41,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 134 states and 8266 transitions. [2022-01-19 08:38:41,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 135 states, 134 states have (on average 61.6865671641791) internal successors, (8266), 134 states have internal predecessors, (8266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:38:41,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 135 states, 135 states have (on average 145.0) internal successors, (19575), 135 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:38:41,292 INFO L81 ComplementDD]: Finished complementDD. Result has 135 states, 135 states have (on average 145.0) internal successors, (19575), 135 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:38:41,292 INFO L186 Difference]: Start difference. First operand has 843 places, 2714 transitions, 60174 flow. Second operand 134 states and 8266 transitions. [2022-01-19 08:38:41,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 3997 transitions, 98946 flow [2022-01-19 08:38:58,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 933 places, 3997 transitions, 98258 flow, removed 236 selfloop flow, removed 37 redundant places. [2022-01-19 08:38:58,394 INFO L242 Difference]: Finished difference. Result has 972 places, 3472 transitions, 85195 flow [2022-01-19 08:38:58,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=59616, PETRI_DIFFERENCE_MINUEND_PLACES=800, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=85195, PETRI_PLACES=972, PETRI_TRANSITIONS=3472} [2022-01-19 08:38:58,397 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 842 predicate places. [2022-01-19 08:38:58,397 INFO L470 AbstractCegarLoop]: Abstraction has has 972 places, 3472 transitions, 85195 flow [2022-01-19 08:38:58,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 58.51136363636363) internal successors, (5149), 88 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:38:58,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:38:58,398 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:38:58,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 08:38:58,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 08:38:58,599 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:38:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:38:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1222718322, now seen corresponding path program 11 times [2022-01-19 08:38:58,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:38:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26491235] [2022-01-19 08:38:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:38:58,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:38:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:38:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:38:59,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:38:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26491235] [2022-01-19 08:38:59,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26491235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:38:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134061964] [2022-01-19 08:38:59,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:38:59,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:38:59,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:38:59,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:38:59,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 08:39:00,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:39:00,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:39:00,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-19 08:39:00,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:39:01,118 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 08:39:01,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 08:39:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:39:01,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:39:02,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:39:02,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2022-01-19 08:39:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:39:03,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134061964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:39:03,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:39:03,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25, 22] total 73 [2022-01-19 08:39:03,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357009148] [2022-01-19 08:39:03,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:39:03,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-19 08:39:03,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:39:03,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-19 08:39:03,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=4898, Unknown=0, NotChecked=0, Total=5256 [2022-01-19 08:39:03,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:39:03,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 972 places, 3472 transitions, 85195 flow. Second operand has 73 states, 73 states have (on average 58.917808219178085) internal successors, (4301), 73 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:39:03,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:39:03,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:39:03,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:39:46,524 INFO L129 PetriNetUnfolder]: 14583/30314 cut-off events. [2022-01-19 08:39:46,524 INFO L130 PetriNetUnfolder]: For 3590529/3590773 co-relation queries the response was YES. [2022-01-19 08:39:48,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 425607 conditions, 30314 events. 14583/30314 cut-off events. For 3590529/3590773 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 302089 event pairs, 3356 based on Foata normal form. 70/30188 useless extension candidates. Maximal degree in co-relation 425322. Up to 20862 conditions per place. [2022-01-19 08:39:48,743 INFO L132 encePairwiseOnDemand]: 107/145 looper letters, 2730 selfloop transitions, 1020 changer transitions 34/3830 dead transitions. [2022-01-19 08:39:48,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1036 places, 3830 transitions, 101046 flow [2022-01-19 08:39:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 08:39:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 08:39:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4578 transitions. [2022-01-19 08:39:48,746 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4209655172413793 [2022-01-19 08:39:48,746 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4578 transitions. [2022-01-19 08:39:48,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4578 transitions. [2022-01-19 08:39:48,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:39:48,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4578 transitions. [2022-01-19 08:39:48,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 61.04) internal successors, (4578), 75 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:39:48,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 145.0) internal successors, (11020), 76 states have internal predecessors, (11020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:39:48,755 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 145.0) internal successors, (11020), 76 states have internal predecessors, (11020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:39:48,755 INFO L186 Difference]: Start difference. First operand has 972 places, 3472 transitions, 85195 flow. Second operand 75 states and 4578 transitions. [2022-01-19 08:39:48,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1036 places, 3830 transitions, 101046 flow [2022-01-19 08:40:13,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 984 places, 3830 transitions, 97345 flow, removed 1261 selfloop flow, removed 52 redundant places. [2022-01-19 08:40:13,482 INFO L242 Difference]: Finished difference. Result has 1011 places, 3546 transitions, 87138 flow [2022-01-19 08:40:13,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=81817, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=952, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=87138, PETRI_PLACES=1011, PETRI_TRANSITIONS=3546} [2022-01-19 08:40:13,485 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 881 predicate places. [2022-01-19 08:40:13,485 INFO L470 AbstractCegarLoop]: Abstraction has has 1011 places, 3546 transitions, 87138 flow [2022-01-19 08:40:13,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 58.917808219178085) internal successors, (4301), 73 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:40:13,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:40:13,486 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:40:13,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 08:40:13,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:40:13,686 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:40:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:40:13,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1637763206, now seen corresponding path program 12 times [2022-01-19 08:40:13,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:40:13,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515678544] [2022-01-19 08:40:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:40:13,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:40:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:40:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:40:14,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:40:14,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515678544] [2022-01-19 08:40:14,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515678544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:40:14,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225620787] [2022-01-19 08:40:14,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:40:14,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:40:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:40:14,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:40:14,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 08:40:14,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:40:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:40:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-19 08:40:14,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:40:16,513 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 08:40:16,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 08:40:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:40:17,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:40:18,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:40:18,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-19 08:40:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:40:20,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225620787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:40:20,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:40:20,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 89 [2022-01-19 08:40:20,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758769188] [2022-01-19 08:40:20,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:40:20,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-19 08:40:20,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:40:20,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-19 08:40:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=7164, Unknown=0, NotChecked=0, Total=7832 [2022-01-19 08:40:20,892 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:40:20,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1011 places, 3546 transitions, 87138 flow. Second operand has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:40:20,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:40:20,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:40:20,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:40:59,621 INFO L129 PetriNetUnfolder]: 14691/30468 cut-off events. [2022-01-19 08:40:59,621 INFO L130 PetriNetUnfolder]: For 3702630/3702888 co-relation queries the response was YES. [2022-01-19 08:41:01,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 431120 conditions, 30468 events. 14691/30468 cut-off events. For 3702630/3702888 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 303758 event pairs, 3404 based on Foata normal form. 85/30352 useless extension candidates. Maximal degree in co-relation 430823. Up to 19590 conditions per place. [2022-01-19 08:41:02,046 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 2405 selfloop transitions, 1252 changer transitions 85/3788 dead transitions. [2022-01-19 08:41:02,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1068 places, 3788 transitions, 100676 flow [2022-01-19 08:41:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 08:41:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 08:41:02,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4223 transitions. [2022-01-19 08:41:02,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4220889555222389 [2022-01-19 08:41:02,049 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4223 transitions. [2022-01-19 08:41:02,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4223 transitions. [2022-01-19 08:41:02,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:41:02,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4223 transitions. [2022-01-19 08:41:02,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 61.20289855072464) internal successors, (4223), 69 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:41:02,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 145.0) internal successors, (10150), 70 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:41:02,057 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 145.0) internal successors, (10150), 70 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:41:02,057 INFO L186 Difference]: Start difference. First operand has 1011 places, 3546 transitions, 87138 flow. Second operand 69 states and 4223 transitions. [2022-01-19 08:41:02,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1068 places, 3788 transitions, 100676 flow [2022-01-19 08:41:28,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1021 places, 3788 transitions, 99715 flow, removed 218 selfloop flow, removed 47 redundant places. [2022-01-19 08:41:28,705 INFO L242 Difference]: Finished difference. Result has 1052 places, 3604 transitions, 91950 flow [2022-01-19 08:41:28,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=86209, PETRI_DIFFERENCE_MINUEND_PLACES=953, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=91950, PETRI_PLACES=1052, PETRI_TRANSITIONS=3604} [2022-01-19 08:41:28,708 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 922 predicate places. [2022-01-19 08:41:28,708 INFO L470 AbstractCegarLoop]: Abstraction has has 1052 places, 3604 transitions, 91950 flow [2022-01-19 08:41:28,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:41:28,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:41:28,709 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:41:28,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-19 08:41:28,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:41:28,913 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:41:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:41:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash 710304050, now seen corresponding path program 13 times [2022-01-19 08:41:28,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:41:28,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726762141] [2022-01-19 08:41:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:41:28,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:41:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:41:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:41:30,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:41:30,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726762141] [2022-01-19 08:41:30,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726762141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:41:30,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029107121] [2022-01-19 08:41:30,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:41:30,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:41:30,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:41:30,132 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:41:30,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 08:41:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:41:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-19 08:41:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:41:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-19 08:41:32,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:41:32,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-01-19 08:41:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:41:32,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:41:33,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:41:33,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2022-01-19 08:41:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:41:37,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029107121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:41:37,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:41:37,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 30] total 93 [2022-01-19 08:41:37,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699777707] [2022-01-19 08:41:37,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:41:37,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-19 08:41:37,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:41:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-19 08:41:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=7716, Unknown=0, NotChecked=0, Total=8556 [2022-01-19 08:41:37,461 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:41:37,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1052 places, 3604 transitions, 91950 flow. Second operand has 93 states, 93 states have (on average 58.376344086021504) internal successors, (5429), 93 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:41:37,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:41:37,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:41:37,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:18,372 INFO L129 PetriNetUnfolder]: 14994/31178 cut-off events. [2022-01-19 08:42:18,372 INFO L130 PetriNetUnfolder]: For 3976176/3976440 co-relation queries the response was YES. [2022-01-19 08:42:20,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 454185 conditions, 31178 events. 14994/31178 cut-off events. For 3976176/3976440 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 312572 event pairs, 2993 based on Foata normal form. 112/31096 useless extension candidates. Maximal degree in co-relation 453868. Up to 14955 conditions per place. [2022-01-19 08:42:21,015 INFO L132 encePairwiseOnDemand]: 103/145 looper letters, 1882 selfloop transitions, 2191 changer transitions 45/4164 dead transitions. [2022-01-19 08:42:21,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1126 places, 4164 transitions, 115522 flow [2022-01-19 08:42:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-19 08:42:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-01-19 08:42:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5822 transitions. [2022-01-19 08:42:21,019 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4226497277676951 [2022-01-19 08:42:21,019 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5822 transitions. [2022-01-19 08:42:21,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5822 transitions. [2022-01-19 08:42:21,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:21,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5822 transitions. [2022-01-19 08:42:21,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 61.28421052631579) internal successors, (5822), 95 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:21,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 145.0) internal successors, (13920), 96 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:21,029 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 145.0) internal successors, (13920), 96 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:21,030 INFO L186 Difference]: Start difference. First operand has 1052 places, 3604 transitions, 91950 flow. Second operand 95 states and 5822 transitions. [2022-01-19 08:42:21,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1126 places, 4164 transitions, 115522 flow [2022-01-19 08:42:50,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1076 places, 4164 transitions, 114606 flow, removed 223 selfloop flow, removed 50 redundant places. [2022-01-19 08:42:50,352 INFO L242 Difference]: Finished difference. Result has 1107 places, 3924 transitions, 107443 flow [2022-01-19 08:42:50,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=91326, PETRI_DIFFERENCE_MINUEND_PLACES=982, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1894, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=107443, PETRI_PLACES=1107, PETRI_TRANSITIONS=3924} [2022-01-19 08:42:50,355 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 977 predicate places. [2022-01-19 08:42:50,355 INFO L470 AbstractCegarLoop]: Abstraction has has 1107 places, 3924 transitions, 107443 flow [2022-01-19 08:42:50,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 58.376344086021504) internal successors, (5429), 93 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:50,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:50,356 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:50,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 08:42:50,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:42:50,560 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:42:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1949452336, now seen corresponding path program 14 times [2022-01-19 08:42:50,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:50,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049597912] [2022-01-19 08:42:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:50,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:51,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:51,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049597912] [2022-01-19 08:42:51,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049597912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:42:51,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893089932] [2022-01-19 08:42:51,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:42:51,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:42:51,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:42:51,742 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:42:51,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 08:42:51,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:42:51,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:42:51,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 77 conjunts are in the unsatisfiable core [2022-01-19 08:42:51,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:42:52,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 08:42:52,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 08:42:53,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:42:53,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:42:54,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:42:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:54,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:42:57,877 INFO L353 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-01-19 08:42:57,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 96 [2022-01-19 08:42:57,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:42:57,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 465 treesize of output 433 [2022-01-19 08:42:57,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:42:57,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 417 treesize of output 361 [2022-01-19 08:42:57,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:42:57,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 325 [2022-01-19 08:42:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:59,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893089932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:42:59,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:42:59,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40, 36] total 103 [2022-01-19 08:42:59,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796991634] [2022-01-19 08:42:59,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:42:59,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-19 08:42:59,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-19 08:42:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=9360, Unknown=89, NotChecked=0, Total=10506 [2022-01-19 08:42:59,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 145 [2022-01-19 08:42:59,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1107 places, 3924 transitions, 107443 flow. Second operand has 103 states, 103 states have (on average 51.24271844660194) internal successors, (5278), 103 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:59,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:59,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 145 [2022-01-19 08:42:59,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:55,261 INFO L129 PetriNetUnfolder]: 15368/32088 cut-off events. [2022-01-19 08:43:55,262 INFO L130 PetriNetUnfolder]: For 5189181/5189449 co-relation queries the response was YES. [2022-01-19 08:43:57,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 504617 conditions, 32088 events. 15368/32088 cut-off events. For 5189181/5189449 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 324308 event pairs, 1125 based on Foata normal form. 122/32045 useless extension candidates. Maximal degree in co-relation 504287. Up to 10419 conditions per place. [2022-01-19 08:43:58,164 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 1267 selfloop transitions, 3264 changer transitions 16/4590 dead transitions. [2022-01-19 08:43:58,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1215 places, 4590 transitions, 137558 flow [2022-01-19 08:43:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-19 08:43:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2022-01-19 08:43:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 6529 transitions. [2022-01-19 08:43:58,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3752298850574713 [2022-01-19 08:43:58,168 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 6529 transitions. [2022-01-19 08:43:58,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 6529 transitions. [2022-01-19 08:43:58,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:58,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 6529 transitions. [2022-01-19 08:43:58,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 54.40833333333333) internal successors, (6529), 120 states have internal predecessors, (6529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:58,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 145.0) internal successors, (17545), 121 states have internal predecessors, (17545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:58,181 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 145.0) internal successors, (17545), 121 states have internal predecessors, (17545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:58,181 INFO L186 Difference]: Start difference. First operand has 1107 places, 3924 transitions, 107443 flow. Second operand 120 states and 6529 transitions. [2022-01-19 08:43:58,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1215 places, 4590 transitions, 137558 flow [2022-01-19 08:44:37,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1164 places, 4590 transitions, 134209 flow, removed 1346 selfloop flow, removed 51 redundant places. [2022-01-19 08:44:37,964 INFO L242 Difference]: Finished difference. Result has 1193 places, 4137 transitions, 121371 flow [2022-01-19 08:44:37,967 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=105091, PETRI_DIFFERENCE_MINUEND_PLACES=1045, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3054, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=121371, PETRI_PLACES=1193, PETRI_TRANSITIONS=4137} [2022-01-19 08:44:37,967 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 1063 predicate places. [2022-01-19 08:44:37,967 INFO L470 AbstractCegarLoop]: Abstraction has has 1193 places, 4137 transitions, 121371 flow [2022-01-19 08:44:37,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 51.24271844660194) internal successors, (5278), 103 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:37,968 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:44:37,968 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:44:37,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-19 08:44:38,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:38,168 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:44:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:44:38,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1872028216, now seen corresponding path program 15 times [2022-01-19 08:44:38,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:44:38,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580431826] [2022-01-19 08:44:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:38,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:44:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:39,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:44:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580431826] [2022-01-19 08:44:39,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580431826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:44:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479987518] [2022-01-19 08:44:39,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:44:39,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:39,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:44:39,366 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:44:39,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 08:44:39,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:44:39,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:44:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-19 08:44:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:44:40,521 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:44:40,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-19 08:44:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:44:40,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:44:41,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:44:41,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2022-01-19 08:44:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:44:49,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479987518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:44:49,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:44:49,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25, 22] total 74 [2022-01-19 08:44:49,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058865878] [2022-01-19 08:44:49,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:44:49,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-19 08:44:49,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:44:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-19 08:44:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=5018, Unknown=1, NotChecked=0, Total=5402 [2022-01-19 08:44:49,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-01-19 08:44:49,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1193 places, 4137 transitions, 121371 flow. Second operand has 74 states, 74 states have (on average 58.851351351351354) internal successors, (4355), 74 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:49,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:44:49,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-01-19 08:44:49,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:42,150 INFO L129 PetriNetUnfolder]: 15612/33198 cut-off events. [2022-01-19 08:45:42,151 INFO L130 PetriNetUnfolder]: For 5463979/5464239 co-relation queries the response was YES. [2022-01-19 08:45:44,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 532233 conditions, 33198 events. 15612/33198 cut-off events. For 5463979/5464239 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 341642 event pairs, 3407 based on Foata normal form. 82/33061 useless extension candidates. Maximal degree in co-relation 531883. Up to 23088 conditions per place. [2022-01-19 08:45:44,863 INFO L132 encePairwiseOnDemand]: 107/145 looper letters, 3247 selfloop transitions, 1124 changer transitions 26/4443 dead transitions. [2022-01-19 08:45:44,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1253 places, 4443 transitions, 137963 flow [2022-01-19 08:45:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 08:45:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 08:45:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4162 transitions. [2022-01-19 08:45:44,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42210953346855984 [2022-01-19 08:45:44,865 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4162 transitions. [2022-01-19 08:45:44,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4162 transitions. [2022-01-19 08:45:44,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:44,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4162 transitions. [2022-01-19 08:45:44,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 61.205882352941174) internal successors, (4162), 68 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:44,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 145.0) internal successors, (10005), 69 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:44,873 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 145.0) internal successors, (10005), 69 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:44,873 INFO L186 Difference]: Start difference. First operand has 1193 places, 4137 transitions, 121371 flow. Second operand 68 states and 4162 transitions. [2022-01-19 08:45:44,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1253 places, 4443 transitions, 137963 flow Received shutdown request... [2022-01-19 08:46:22,910 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 08:46:22,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 08:46:22,928 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:46:22,928 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:46:23,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:23,111 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 08:46:23,112 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 08:46:23,112 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 08:46:23,114 INFO L732 BasicCegarLoop]: Path program histogram: [15, 13, 2, 2, 1, 1] [2022-01-19 08:46:23,115 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 08:46:23,115 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 08:46:23,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 08:46:23 BasicIcfg [2022-01-19 08:46:23,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 08:46:23,117 INFO L158 Benchmark]: Toolchain (without parser) took 791462.97ms. Allocated memory was 356.5MB in the beginning and 10.2GB in the end (delta: 9.8GB). Free memory was 302.6MB in the beginning and 5.4GB in the end (delta: -5.1GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. [2022-01-19 08:46:23,117 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 356.5MB. Free memory is still 319.8MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:46:23,118 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.58ms. Allocated memory is still 356.5MB. Free memory was 302.4MB in the beginning and 327.7MB in the end (delta: -25.3MB). Peak memory consumption was 17.1MB. Max. memory is 16.0GB. [2022-01-19 08:46:23,118 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.79ms. Allocated memory is still 356.5MB. Free memory was 327.7MB in the beginning and 325.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:46:23,118 INFO L158 Benchmark]: Boogie Preprocessor took 16.30ms. Allocated memory is still 356.5MB. Free memory was 325.6MB in the beginning and 324.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:46:23,118 INFO L158 Benchmark]: RCFGBuilder took 361.03ms. Allocated memory is still 356.5MB. Free memory was 324.5MB in the beginning and 302.5MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2022-01-19 08:46:23,118 INFO L158 Benchmark]: TraceAbstraction took 790867.50ms. Allocated memory was 356.5MB in the beginning and 10.2GB in the end (delta: 9.8GB). Free memory was 301.5MB in the beginning and 5.4GB in the end (delta: -5.1GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. [2022-01-19 08:46:23,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 356.5MB. Free memory is still 319.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 187.58ms. Allocated memory is still 356.5MB. Free memory was 302.4MB in the beginning and 327.7MB in the end (delta: -25.3MB). Peak memory consumption was 17.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.79ms. Allocated memory is still 356.5MB. Free memory was 327.7MB in the beginning and 325.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.30ms. Allocated memory is still 356.5MB. Free memory was 325.6MB in the beginning and 324.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 361.03ms. Allocated memory is still 356.5MB. Free memory was 324.5MB in the beginning and 302.5MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 790867.50ms. Allocated memory was 356.5MB in the beginning and 10.2GB in the end (delta: 9.8GB). Free memory was 301.5MB in the beginning and 5.4GB in the end (delta: -5.1GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 159 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 790.8s, OverallIterations: 34, TraceHistogramMax: 2, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 662.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 15179 SdHoareTripleChecker+Valid, 41.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15179 mSDsluCounter, 42732 SdHoareTripleChecker+Invalid, 36.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17250 IncrementalHoareTripleChecker+Unchecked, 53292 mSDsCounter, 1890 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54218 IncrementalHoareTripleChecker+Invalid, 73359 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1890 mSolverCounterUnsat, 1836 mSDtfsCounter, 54218 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6668 GetRequests, 4083 SyntacticMatches, 63 SemanticMatches, 2522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104460 ImplicationChecksByTransitivity, 161.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121371occurred in iteration=33, InterpolantAutomatonStates: 1485, 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: 0.3s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 120.8s InterpolantComputationTime, 6562 NumberOfCodeBlocks, 6541 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 8856 ConstructedInterpolants, 1289 QuantifiedInterpolants, 172771 SizeOfPredicates, 518 NumberOfNonLiveVariables, 5451 ConjunctsInSsa, 914 ConjunctsInUnsatCore, 70 InterpolantComputations, 16 PerfectInterpolantSequences, 122/756 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown