/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 13:54:18,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 13:54:18,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 13:54:18,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 13:54:18,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 13:54:18,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 13:54:18,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 13:54:18,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 13:54:18,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 13:54:18,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 13:54:18,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 13:54:18,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 13:54:18,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 13:54:18,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 13:54:18,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 13:54:18,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 13:54:18,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 13:54:18,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 13:54:18,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 13:54:18,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 13:54:18,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 13:54:18,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 13:54:18,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 13:54:18,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 13:54:18,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 13:54:18,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 13:54:18,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 13:54:18,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 13:54:18,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 13:54:18,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 13:54:18,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 13:54:18,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 13:54:18,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 13:54:18,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 13:54:18,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 13:54:18,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 13:54:18,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 13:54:18,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 13:54:18,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 13:54:18,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 13:54:18,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 13:54:18,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf [2022-01-19 13:54:18,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 13:54:18,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 13:54:18,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 13:54:18,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 13:54:18,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 13:54:18,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 13:54:18,372 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 13:54:18,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 13:54:18,372 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 13:54:18,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 13:54:18,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 13:54:18,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 13:54:18,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 13:54:18,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 13:54:18,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 13:54:18,374 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 13:54:18,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 13:54:18,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 13:54:18,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 13:54:18,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 13:54:18,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 13:54:18,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 13:54:18,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 13:54:18,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 13:54:18,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 13:54:18,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 13:54:18,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 13:54:18,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 13:54:18,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 13:54:18,376 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 13:54:18,376 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 13:54:18,376 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 13:54:18,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 13:54:18,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 13:54:18,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 13:54:18,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 13:54:18,619 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 13:54:18,620 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 13:54:18,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-01-19 13:54:18,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047086949/e5fe3ded7c4b4806a01e3fda34ad347c/FLAGccd57ba21 [2022-01-19 13:54:19,090 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 13:54:19,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-01-19 13:54:19,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047086949/e5fe3ded7c4b4806a01e3fda34ad347c/FLAGccd57ba21 [2022-01-19 13:54:19,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047086949/e5fe3ded7c4b4806a01e3fda34ad347c [2022-01-19 13:54:19,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 13:54:19,476 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 13:54:19,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 13:54:19,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 13:54:19,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 13:54:19,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b70832a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19, skipping insertion in model container [2022-01-19 13:54:19,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 13:54:19,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 13:54:19,725 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-bad-ring.wvr.c[3947,3960] [2022-01-19 13:54:19,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 13:54:19,740 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 13:54:19,777 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-bad-ring.wvr.c[3947,3960] [2022-01-19 13:54:19,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 13:54:19,802 INFO L208 MainTranslator]: Completed translation [2022-01-19 13:54:19,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19 WrapperNode [2022-01-19 13:54:19,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 13:54:19,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 13:54:19,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 13:54:19,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 13:54:19,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,865 INFO L137 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2022-01-19 13:54:19,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 13:54:19,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 13:54:19,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 13:54:19,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 13:54:19,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 13:54:19,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 13:54:19,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 13:54:19,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 13:54:19,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (1/1) ... [2022-01-19 13:54:19,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 13:54:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:54:19,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 13:54:19,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 13:54:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 13:54:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 13:54:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 13:54:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 13:54:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 13:54:19,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 13:54:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 13:54:19,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 13:54:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-19 13:54:19,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-19 13:54:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 13:54:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 13:54:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 13:54:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 13:54:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 13:54:19,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 13:54:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 13:54:20,001 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 13:54:20,134 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 13:54:20,135 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 13:54:20,484 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 13:54:20,642 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 13:54:20,642 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-19 13:54:20,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:54:20 BoogieIcfgContainer [2022-01-19 13:54:20,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 13:54:20,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 13:54:20,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 13:54:20,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 13:54:20,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 01:54:19" (1/3) ... [2022-01-19 13:54:20,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ec0fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:54:20, skipping insertion in model container [2022-01-19 13:54:20,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:54:19" (2/3) ... [2022-01-19 13:54:20,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ec0fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:54:20, skipping insertion in model container [2022-01-19 13:54:20,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:54:20" (3/3) ... [2022-01-19 13:54:20,653 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-01-19 13:54:20,657 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 13:54:20,657 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 13:54:20,657 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 13:54:20,741 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,741 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,741 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,741 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,742 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,747 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,755 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,756 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,756 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,756 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,756 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,756 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,759 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,759 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,759 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,760 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,760 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,760 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,761 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,761 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,762 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,762 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,762 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,762 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,762 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,762 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,762 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,763 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,763 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,763 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,763 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,763 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,763 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,764 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,764 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,764 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,764 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,764 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,764 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,764 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,765 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,765 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,765 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,765 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,765 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,766 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,766 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,766 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,766 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,766 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,766 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,766 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,767 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,767 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,767 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,767 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,767 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,767 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,767 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,768 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,768 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,768 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,768 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,768 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,768 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,776 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,779 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,779 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,780 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,780 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,780 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,780 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,780 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,784 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,784 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,785 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,785 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,785 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,785 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,786 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,788 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,788 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,788 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,788 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,788 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,789 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,789 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,789 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,789 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,789 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,789 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,790 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,790 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,790 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,795 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,800 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,800 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,800 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,802 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,807 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,807 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,807 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,807 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,807 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,808 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,808 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,810 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,810 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,812 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:54:20,820 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-19 13:54:20,876 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 13:54:20,881 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 13:54:20,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-19 13:54:20,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2022-01-19 13:54:21,016 INFO L129 PetriNetUnfolder]: 22/264 cut-off events. [2022-01-19 13:54:21,017 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 13:54:21,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2022-01-19 13:54:21,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2022-01-19 13:54:21,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2022-01-19 13:54:21,093 INFO L129 PetriNetUnfolder]: 22/252 cut-off events. [2022-01-19 13:54:21,094 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 13:54:21,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:21,095 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:21,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash 956219309, now seen corresponding path program 1 times [2022-01-19 13:54:21,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:21,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203572078] [2022-01-19 13:54:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:21,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:54:21,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203572078] [2022-01-19 13:54:21,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203572078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:21,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:54:21,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 13:54:21,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302841846] [2022-01-19 13:54:21,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:21,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 13:54:21,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 13:54:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 13:54:21,421 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 267 [2022-01-19 13:54:21,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 253 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:21,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:21,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 267 [2022-01-19 13:54:21,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:21,620 INFO L129 PetriNetUnfolder]: 137/624 cut-off events. [2022-01-19 13:54:21,620 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-01-19 13:54:21,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 624 events. 137/624 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2446 event pairs, 74 based on Foata normal form. 97/655 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2022-01-19 13:54:21,629 INFO L132 encePairwiseOnDemand]: 251/267 looper letters, 13 selfloop transitions, 0 changer transitions 8/237 dead transitions. [2022-01-19 13:54:21,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 518 flow [2022-01-19 13:54:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 13:54:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 13:54:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2022-01-19 13:54:21,648 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9419475655430711 [2022-01-19 13:54:21,648 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2022-01-19 13:54:21,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2022-01-19 13:54:21,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:21,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2022-01-19 13:54:21,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:21,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:21,666 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:21,667 INFO L186 Difference]: Start difference. First operand has 241 places, 253 transitions, 524 flow. Second operand 2 states and 503 transitions. [2022-01-19 13:54:21,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 518 flow [2022-01-19 13:54:21,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 13:54:21,677 INFO L242 Difference]: Finished difference. Result has 236 places, 229 transitions, 464 flow [2022-01-19 13:54:21,679 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=464, PETRI_PLACES=236, PETRI_TRANSITIONS=229} [2022-01-19 13:54:21,684 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -5 predicate places. [2022-01-19 13:54:21,684 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 229 transitions, 464 flow [2022-01-19 13:54:21,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:21,685 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:21,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:21,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 13:54:21,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1907627099, now seen corresponding path program 1 times [2022-01-19 13:54:21,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:21,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845953641] [2022-01-19 13:54:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:21,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:54:22,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:22,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845953641] [2022-01-19 13:54:22,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845953641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:22,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:54:22,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:54:22,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522694022] [2022-01-19 13:54:22,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:22,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:54:22,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:22,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:54:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:54:22,025 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2022-01-19 13:54:22,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 229 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:22,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2022-01-19 13:54:22,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:22,144 INFO L129 PetriNetUnfolder]: 125/535 cut-off events. [2022-01-19 13:54:22,144 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-01-19 13:54:22,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 535 events. 125/535 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1784 event pairs, 29 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 745. Up to 142 conditions per place. [2022-01-19 13:54:22,149 INFO L132 encePairwiseOnDemand]: 264/267 looper letters, 22 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-01-19 13:54:22,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 236 transitions, 528 flow [2022-01-19 13:54:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:54:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:54:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-01-19 13:54:22,152 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038701622971286 [2022-01-19 13:54:22,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-01-19 13:54:22,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-01-19 13:54:22,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:22,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-01-19 13:54:22,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,159 INFO L186 Difference]: Start difference. First operand has 236 places, 229 transitions, 464 flow. Second operand 3 states and 724 transitions. [2022-01-19 13:54:22,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 236 transitions, 528 flow [2022-01-19 13:54:22,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 236 transitions, 528 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 13:54:22,167 INFO L242 Difference]: Finished difference. Result has 231 places, 230 transitions, 476 flow [2022-01-19 13:54:22,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2022-01-19 13:54:22,168 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -10 predicate places. [2022-01-19 13:54:22,168 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 476 flow [2022-01-19 13:54:22,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,169 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:22,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:22,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 13:54:22,169 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:22,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash -104740663, now seen corresponding path program 2 times [2022-01-19 13:54:22,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:22,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761228869] [2022-01-19 13:54:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:22,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:54:22,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:22,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761228869] [2022-01-19 13:54:22,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761228869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:22,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:54:22,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 13:54:22,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599502853] [2022-01-19 13:54:22,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:22,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 13:54:22,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 13:54:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 13:54:22,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-01-19 13:54:22,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:22,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-01-19 13:54:22,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:22,644 INFO L129 PetriNetUnfolder]: 152/705 cut-off events. [2022-01-19 13:54:22,645 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-01-19 13:54:22,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 705 events. 152/705 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2617 event pairs, 84 based on Foata normal form. 9/664 useless extension candidates. Maximal degree in co-relation 1087. Up to 210 conditions per place. [2022-01-19 13:54:22,649 INFO L132 encePairwiseOnDemand]: 257/267 looper letters, 48 selfloop transitions, 8 changer transitions 21/255 dead transitions. [2022-01-19 13:54:22,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 255 transitions, 684 flow [2022-01-19 13:54:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 13:54:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 13:54:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1868 transitions. [2022-01-19 13:54:22,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7773616312942155 [2022-01-19 13:54:22,653 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1868 transitions. [2022-01-19 13:54:22,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1868 transitions. [2022-01-19 13:54:22,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:22,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1868 transitions. [2022-01-19 13:54:22,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.55555555555554) internal successors, (1868), 9 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,663 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,663 INFO L186 Difference]: Start difference. First operand has 231 places, 230 transitions, 476 flow. Second operand 9 states and 1868 transitions. [2022-01-19 13:54:22,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 255 transitions, 684 flow [2022-01-19 13:54:22,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 255 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 13:54:22,669 INFO L242 Difference]: Finished difference. Result has 240 places, 231 transitions, 502 flow [2022-01-19 13:54:22,669 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=502, PETRI_PLACES=240, PETRI_TRANSITIONS=231} [2022-01-19 13:54:22,671 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2022-01-19 13:54:22,671 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 231 transitions, 502 flow [2022-01-19 13:54:22,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,676 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:22,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:22,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 13:54:22,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:22,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1681614449, now seen corresponding path program 1 times [2022-01-19 13:54:22,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:22,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870963510] [2022-01-19 13:54:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:22,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:54:22,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:22,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870963510] [2022-01-19 13:54:22,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870963510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:22,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:54:22,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 13:54:22,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823514012] [2022-01-19 13:54:22,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:22,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 13:54:22,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 13:54:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 13:54:22,857 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-01-19 13:54:22,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 231 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 205.83333333333334) internal successors, (1235), 6 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:22,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:22,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-01-19 13:54:22,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:23,049 INFO L129 PetriNetUnfolder]: 127/675 cut-off events. [2022-01-19 13:54:23,049 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-01-19 13:54:23,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 675 events. 127/675 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2114 event pairs, 67 based on Foata normal form. 8/644 useless extension candidates. Maximal degree in co-relation 1044. Up to 214 conditions per place. [2022-01-19 13:54:23,054 INFO L132 encePairwiseOnDemand]: 255/267 looper letters, 49 selfloop transitions, 8 changer transitions 29/264 dead transitions. [2022-01-19 13:54:23,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 264 transitions, 761 flow [2022-01-19 13:54:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 13:54:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 13:54:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1877 transitions. [2022-01-19 13:54:23,058 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7811069496462755 [2022-01-19 13:54:23,058 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1877 transitions. [2022-01-19 13:54:23,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1877 transitions. [2022-01-19 13:54:23,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:23,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1877 transitions. [2022-01-19 13:54:23,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.55555555555554) internal successors, (1877), 9 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,069 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,071 INFO L186 Difference]: Start difference. First operand has 240 places, 231 transitions, 502 flow. Second operand 9 states and 1877 transitions. [2022-01-19 13:54:23,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 264 transitions, 761 flow [2022-01-19 13:54:23,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 264 transitions, 733 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-01-19 13:54:23,078 INFO L242 Difference]: Finished difference. Result has 242 places, 232 transitions, 516 flow [2022-01-19 13:54:23,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=516, PETRI_PLACES=242, PETRI_TRANSITIONS=232} [2022-01-19 13:54:23,079 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 1 predicate places. [2022-01-19 13:54:23,080 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 232 transitions, 516 flow [2022-01-19 13:54:23,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.83333333333334) internal successors, (1235), 6 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:23,080 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:23,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 13:54:23,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1190083129, now seen corresponding path program 1 times [2022-01-19 13:54:23,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:23,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689224964] [2022-01-19 13:54:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:23,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:23,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689224964] [2022-01-19 13:54:23,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689224964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:23,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:54:23,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 13:54:23,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853948065] [2022-01-19 13:54:23,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:23,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 13:54:23,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:23,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 13:54:23,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 13:54:23,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 267 [2022-01-19 13:54:23,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 232 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:23,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 267 [2022-01-19 13:54:23,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:23,467 INFO L129 PetriNetUnfolder]: 245/870 cut-off events. [2022-01-19 13:54:23,467 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-01-19 13:54:23,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1584 conditions, 870 events. 245/870 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4090 event pairs, 84 based on Foata normal form. 1/821 useless extension candidates. Maximal degree in co-relation 1576. Up to 226 conditions per place. [2022-01-19 13:54:23,474 INFO L132 encePairwiseOnDemand]: 262/267 looper letters, 57 selfloop transitions, 2 changer transitions 7/249 dead transitions. [2022-01-19 13:54:23,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 249 transitions, 699 flow [2022-01-19 13:54:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 13:54:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 13:54:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2022-01-19 13:54:23,477 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7752808988764045 [2022-01-19 13:54:23,477 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2022-01-19 13:54:23,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2022-01-19 13:54:23,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:23,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2022-01-19 13:54:23,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,482 INFO L186 Difference]: Start difference. First operand has 242 places, 232 transitions, 516 flow. Second operand 5 states and 1035 transitions. [2022-01-19 13:54:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 249 transitions, 699 flow [2022-01-19 13:54:23,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 249 transitions, 685 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-01-19 13:54:23,488 INFO L242 Difference]: Finished difference. Result has 242 places, 233 transitions, 518 flow [2022-01-19 13:54:23,489 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=242, PETRI_TRANSITIONS=233} [2022-01-19 13:54:23,491 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 1 predicate places. [2022-01-19 13:54:23,491 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 233 transitions, 518 flow [2022-01-19 13:54:23,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,493 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:23,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:23,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 13:54:23,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 675274965, now seen corresponding path program 1 times [2022-01-19 13:54:23,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535228093] [2022-01-19 13:54:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:23,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:23,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535228093] [2022-01-19 13:54:23,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535228093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:23,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:54:23,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 13:54:23,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679318261] [2022-01-19 13:54:23,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:23,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 13:54:23,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 13:54:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 13:54:23,650 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2022-01-19 13:54:23,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 233 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:23,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2022-01-19 13:54:23,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:23,748 INFO L129 PetriNetUnfolder]: 138/580 cut-off events. [2022-01-19 13:54:23,748 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-01-19 13:54:23,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 580 events. 138/580 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1961 event pairs, 50 based on Foata normal form. 11/562 useless extension candidates. Maximal degree in co-relation 982. Up to 128 conditions per place. [2022-01-19 13:54:23,751 INFO L132 encePairwiseOnDemand]: 262/267 looper letters, 22 selfloop transitions, 4 changer transitions 3/241 dead transitions. [2022-01-19 13:54:23,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 241 transitions, 604 flow [2022-01-19 13:54:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 13:54:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 13:54:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2022-01-19 13:54:23,754 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8976279650436954 [2022-01-19 13:54:23,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2022-01-19 13:54:23,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2022-01-19 13:54:23,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:23,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2022-01-19 13:54:23,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,757 INFO L186 Difference]: Start difference. First operand has 242 places, 233 transitions, 518 flow. Second operand 3 states and 719 transitions. [2022-01-19 13:54:23,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 241 transitions, 604 flow [2022-01-19 13:54:23,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 241 transitions, 598 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 13:54:23,762 INFO L242 Difference]: Finished difference. Result has 240 places, 234 transitions, 530 flow [2022-01-19 13:54:23,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=530, PETRI_PLACES=240, PETRI_TRANSITIONS=234} [2022-01-19 13:54:23,763 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2022-01-19 13:54:23,763 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 234 transitions, 530 flow [2022-01-19 13:54:23,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,764 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:23,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:23,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 13:54:23,764 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1313117807, now seen corresponding path program 2 times [2022-01-19 13:54:23,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120441090] [2022-01-19 13:54:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:23,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:23,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:23,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120441090] [2022-01-19 13:54:23,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120441090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:23,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:54:23,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 13:54:23,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45370441] [2022-01-19 13:54:23,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:23,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 13:54:23,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 13:54:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 13:54:23,902 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-01-19 13:54:23,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 234 transitions, 530 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:23,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:23,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-01-19 13:54:23,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:24,118 INFO L129 PetriNetUnfolder]: 188/782 cut-off events. [2022-01-19 13:54:24,118 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2022-01-19 13:54:24,121 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 782 events. 188/782 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3238 event pairs, 121 based on Foata normal form. 9/748 useless extension candidates. Maximal degree in co-relation 1448. Up to 224 conditions per place. [2022-01-19 13:54:24,123 INFO L132 encePairwiseOnDemand]: 259/267 looper letters, 53 selfloop transitions, 6 changer transitions 12/250 dead transitions. [2022-01-19 13:54:24,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 250 transitions, 721 flow [2022-01-19 13:54:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 13:54:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 13:54:24,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1460 transitions. [2022-01-19 13:54:24,127 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7811663991439273 [2022-01-19 13:54:24,127 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1460 transitions. [2022-01-19 13:54:24,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1460 transitions. [2022-01-19 13:54:24,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:24,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1460 transitions. [2022-01-19 13:54:24,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:24,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:24,134 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:24,134 INFO L186 Difference]: Start difference. First operand has 240 places, 234 transitions, 530 flow. Second operand 7 states and 1460 transitions. [2022-01-19 13:54:24,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 250 transitions, 721 flow [2022-01-19 13:54:24,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 250 transitions, 717 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 13:54:24,144 INFO L242 Difference]: Finished difference. Result has 247 places, 235 transitions, 548 flow [2022-01-19 13:54:24,145 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=548, PETRI_PLACES=247, PETRI_TRANSITIONS=235} [2022-01-19 13:54:24,145 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 6 predicate places. [2022-01-19 13:54:24,146 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 235 transitions, 548 flow [2022-01-19 13:54:24,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:24,146 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:24,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:24,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 13:54:24,147 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1955912811, now seen corresponding path program 1 times [2022-01-19 13:54:24,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200647597] [2022-01-19 13:54:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:24,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:24,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:24,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200647597] [2022-01-19 13:54:24,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200647597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:54:24,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529215306] [2022-01-19 13:54:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:24,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:24,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:54:24,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:54:24,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 13:54:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:24,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 13:54:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:54:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:25,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:54:25,456 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 12 treesize of output 4 [2022-01-19 13:54:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:26,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529215306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:54:26,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:54:26,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-19 13:54:26,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778524235] [2022-01-19 13:54:26,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:54:26,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 13:54:26,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:26,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 13:54:26,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-01-19 13:54:26,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-01-19 13:54:26,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 235 transitions, 548 flow. Second operand has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:26,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:26,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-01-19 13:54:26,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:26,883 INFO L129 PetriNetUnfolder]: 189/967 cut-off events. [2022-01-19 13:54:26,884 INFO L130 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2022-01-19 13:54:26,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 967 events. 189/967 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4300 event pairs, 64 based on Foata normal form. 56/973 useless extension candidates. Maximal degree in co-relation 1752. Up to 187 conditions per place. [2022-01-19 13:54:26,889 INFO L132 encePairwiseOnDemand]: 246/267 looper letters, 52 selfloop transitions, 22 changer transitions 61/307 dead transitions. [2022-01-19 13:54:26,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 307 transitions, 1045 flow [2022-01-19 13:54:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-19 13:54:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-01-19 13:54:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4161 transitions. [2022-01-19 13:54:26,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421080791867308 [2022-01-19 13:54:26,897 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4161 transitions. [2022-01-19 13:54:26,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4161 transitions. [2022-01-19 13:54:26,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:26,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4161 transitions. [2022-01-19 13:54:26,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 198.14285714285714) internal successors, (4161), 21 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:26,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:26,955 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:26,955 INFO L186 Difference]: Start difference. First operand has 247 places, 235 transitions, 548 flow. Second operand 21 states and 4161 transitions. [2022-01-19 13:54:26,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 307 transitions, 1045 flow [2022-01-19 13:54:26,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 307 transitions, 1023 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-01-19 13:54:26,963 INFO L242 Difference]: Finished difference. Result has 270 places, 240 transitions, 640 flow [2022-01-19 13:54:26,964 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=640, PETRI_PLACES=270, PETRI_TRANSITIONS=240} [2022-01-19 13:54:26,964 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 29 predicate places. [2022-01-19 13:54:26,964 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 240 transitions, 640 flow [2022-01-19 13:54:26,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:26,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:26,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:26,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 13:54:27,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:27,184 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1813303521, now seen corresponding path program 2 times [2022-01-19 13:54:27,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:27,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842585901] [2022-01-19 13:54:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:27,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 13:54:27,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:27,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842585901] [2022-01-19 13:54:27,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842585901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:54:27,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161152474] [2022-01-19 13:54:27,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 13:54:27,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:27,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:54:27,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:54:27,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 13:54:27,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:54:27,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:54:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-19 13:54:27,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:54:28,462 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-19 13:54:28,462 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 34 treesize of output 10 [2022-01-19 13:54:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:28,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:54:28,754 INFO L353 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-01-19 13:54:28,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 19 [2022-01-19 13:54:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 13:54:29,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161152474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:54:29,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:54:29,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 6] total 23 [2022-01-19 13:54:29,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470515934] [2022-01-19 13:54:29,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:54:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 13:54:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 13:54:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-19 13:54:29,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 267 [2022-01-19 13:54:29,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 240 transitions, 640 flow. Second operand has 23 states, 23 states have (on average 153.0) internal successors, (3519), 23 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:29,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:29,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 267 [2022-01-19 13:54:29,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:30,306 INFO L129 PetriNetUnfolder]: 787/2085 cut-off events. [2022-01-19 13:54:30,307 INFO L130 PetriNetUnfolder]: For 3410/3520 co-relation queries the response was YES. [2022-01-19 13:54:30,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 2085 events. 787/2085 cut-off events. For 3410/3520 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11671 event pairs, 119 based on Foata normal form. 2/1959 useless extension candidates. Maximal degree in co-relation 5208. Up to 651 conditions per place. [2022-01-19 13:54:30,325 INFO L132 encePairwiseOnDemand]: 231/267 looper letters, 195 selfloop transitions, 70 changer transitions 0/397 dead transitions. [2022-01-19 13:54:30,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 397 transitions, 1743 flow [2022-01-19 13:54:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 13:54:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 13:54:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4864 transitions. [2022-01-19 13:54:30,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5692883895131086 [2022-01-19 13:54:30,336 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4864 transitions. [2022-01-19 13:54:30,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4864 transitions. [2022-01-19 13:54:30,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:30,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4864 transitions. [2022-01-19 13:54:30,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:30,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 267.0) internal successors, (8811), 33 states have internal predecessors, (8811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:30,360 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 267.0) internal successors, (8811), 33 states have internal predecessors, (8811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:30,361 INFO L186 Difference]: Start difference. First operand has 270 places, 240 transitions, 640 flow. Second operand 32 states and 4864 transitions. [2022-01-19 13:54:30,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 397 transitions, 1743 flow [2022-01-19 13:54:30,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 397 transitions, 1600 flow, removed 50 selfloop flow, removed 10 redundant places. [2022-01-19 13:54:30,373 INFO L242 Difference]: Finished difference. Result has 300 places, 301 transitions, 1127 flow [2022-01-19 13:54:30,374 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1127, PETRI_PLACES=300, PETRI_TRANSITIONS=301} [2022-01-19 13:54:30,374 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 59 predicate places. [2022-01-19 13:54:30,374 INFO L470 AbstractCegarLoop]: Abstraction has has 300 places, 301 transitions, 1127 flow [2022-01-19 13:54:30,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 153.0) internal successors, (3519), 23 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:30,376 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:30,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:30,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 13:54:30,579 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,SelfDestructingSolverStorable8 [2022-01-19 13:54:30,580 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1897090553, now seen corresponding path program 3 times [2022-01-19 13:54:30,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284556072] [2022-01-19 13:54:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:30,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:31,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284556072] [2022-01-19 13:54:31,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284556072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:54:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980220774] [2022-01-19 13:54:31,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 13:54:31,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:31,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:54:31,241 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:54:31,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 13:54:31,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 13:54:31,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:54:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-19 13:54:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:54:32,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 13:54:32,025 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 13:54:32,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 13:54:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 13:54:32,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 13:54:32,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980220774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:32,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 13:54:32,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [22] total 32 [2022-01-19 13:54:32,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657770107] [2022-01-19 13:54:32,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:32,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 13:54:32,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 13:54:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2022-01-19 13:54:32,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 267 [2022-01-19 13:54:32,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 301 transitions, 1127 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:32,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:32,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 267 [2022-01-19 13:54:32,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:33,054 INFO L129 PetriNetUnfolder]: 1100/2821 cut-off events. [2022-01-19 13:54:33,054 INFO L130 PetriNetUnfolder]: For 7031/7239 co-relation queries the response was YES. [2022-01-19 13:54:33,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9114 conditions, 2821 events. 1100/2821 cut-off events. For 7031/7239 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17927 event pairs, 333 based on Foata normal form. 30/2700 useless extension candidates. Maximal degree in co-relation 9082. Up to 823 conditions per place. [2022-01-19 13:54:33,090 INFO L132 encePairwiseOnDemand]: 242/267 looper letters, 109 selfloop transitions, 35 changer transitions 0/335 dead transitions. [2022-01-19 13:54:33,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 335 transitions, 1641 flow [2022-01-19 13:54:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 13:54:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 13:54:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3268 transitions. [2022-01-19 13:54:33,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7199823749724609 [2022-01-19 13:54:33,098 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3268 transitions. [2022-01-19 13:54:33,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3268 transitions. [2022-01-19 13:54:33,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:33,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3268 transitions. [2022-01-19 13:54:33,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 192.23529411764707) internal successors, (3268), 17 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:33,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:33,163 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:33,163 INFO L186 Difference]: Start difference. First operand has 300 places, 301 transitions, 1127 flow. Second operand 17 states and 3268 transitions. [2022-01-19 13:54:33,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 335 transitions, 1641 flow [2022-01-19 13:54:33,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 335 transitions, 1555 flow, removed 33 selfloop flow, removed 8 redundant places. [2022-01-19 13:54:33,177 INFO L242 Difference]: Finished difference. Result has 310 places, 306 transitions, 1192 flow [2022-01-19 13:54:33,178 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1192, PETRI_PLACES=310, PETRI_TRANSITIONS=306} [2022-01-19 13:54:33,178 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 69 predicate places. [2022-01-19 13:54:33,178 INFO L470 AbstractCegarLoop]: Abstraction has has 310 places, 306 transitions, 1192 flow [2022-01-19 13:54:33,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:33,179 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:33,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:33,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 13:54:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:33,392 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash -747039377, now seen corresponding path program 4 times [2022-01-19 13:54:33,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:33,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679971300] [2022-01-19 13:54:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:33,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:34,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679971300] [2022-01-19 13:54:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679971300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:54:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205889575] [2022-01-19 13:54:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 13:54:34,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:54:34,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:54:34,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 13:54:34,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 13:54:34,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:54:34,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-19 13:54:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:54:34,262 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 13:54:34,289 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 13:54:34,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-01-19 13:54:34,516 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-01-19 13:54:34,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-01-19 13:54:35,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:54:35,939 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 13:54:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:36,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:54:36,997 INFO L353 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2022-01-19 13:54:36,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 312 treesize of output 284 [2022-01-19 13:54:37,013 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-19 13:54:37,013 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 268 treesize of output 220 [2022-01-19 13:54:37,023 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-19 13:54:37,024 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 174 treesize of output 150 [2022-01-19 13:54:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 13:54:38,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205889575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:54:38,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:54:38,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 64 [2022-01-19 13:54:38,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439856071] [2022-01-19 13:54:38,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:54:38,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-19 13:54:38,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:38,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-19 13:54:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3691, Unknown=1, NotChecked=0, Total=4032 [2022-01-19 13:54:38,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2022-01-19 13:54:38,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 306 transitions, 1192 flow. Second operand has 64 states, 64 states have (on average 153.15625) internal successors, (9802), 64 states have internal predecessors, (9802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:38,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:38,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2022-01-19 13:54:38,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:44,239 INFO L129 PetriNetUnfolder]: 1276/3471 cut-off events. [2022-01-19 13:54:44,240 INFO L130 PetriNetUnfolder]: For 8323/8535 co-relation queries the response was YES. [2022-01-19 13:54:44,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11189 conditions, 3471 events. 1276/3471 cut-off events. For 8323/8535 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 23982 event pairs, 221 based on Foata normal form. 17/3321 useless extension candidates. Maximal degree in co-relation 11154. Up to 1524 conditions per place. [2022-01-19 13:54:44,271 INFO L132 encePairwiseOnDemand]: 208/267 looper letters, 224 selfloop transitions, 163 changer transitions 0/530 dead transitions. [2022-01-19 13:54:44,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 530 transitions, 2907 flow [2022-01-19 13:54:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-19 13:54:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-01-19 13:54:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 11659 transitions. [2022-01-19 13:54:44,287 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5745614035087719 [2022-01-19 13:54:44,287 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 11659 transitions. [2022-01-19 13:54:44,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 11659 transitions. [2022-01-19 13:54:44,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:44,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 11659 transitions. [2022-01-19 13:54:44,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 153.4078947368421) internal successors, (11659), 76 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:44,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 267.0) internal successors, (20559), 77 states have internal predecessors, (20559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:44,340 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 267.0) internal successors, (20559), 77 states have internal predecessors, (20559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:44,341 INFO L186 Difference]: Start difference. First operand has 310 places, 306 transitions, 1192 flow. Second operand 76 states and 11659 transitions. [2022-01-19 13:54:44,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 530 transitions, 2907 flow [2022-01-19 13:54:44,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 530 transitions, 2803 flow, removed 4 selfloop flow, removed 14 redundant places. [2022-01-19 13:54:44,363 INFO L242 Difference]: Finished difference. Result has 384 places, 415 transitions, 2116 flow [2022-01-19 13:54:44,363 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=2116, PETRI_PLACES=384, PETRI_TRANSITIONS=415} [2022-01-19 13:54:44,364 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 143 predicate places. [2022-01-19 13:54:44,364 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 415 transitions, 2116 flow [2022-01-19 13:54:44,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 153.15625) internal successors, (9802), 64 states have internal predecessors, (9802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:44,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:44,367 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:44,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 13:54:44,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:44,593 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash 529451187, now seen corresponding path program 5 times [2022-01-19 13:54:44,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:44,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720541606] [2022-01-19 13:54:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:44,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 13:54:44,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:44,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720541606] [2022-01-19 13:54:44,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720541606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:44,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:54:44,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 13:54:44,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273373700] [2022-01-19 13:54:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:44,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 13:54:44,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 13:54:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-01-19 13:54:44,889 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 267 [2022-01-19 13:54:44,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 415 transitions, 2116 flow. Second operand has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 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 13:54:44,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:44,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 267 [2022-01-19 13:54:44,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:46,067 INFO L129 PetriNetUnfolder]: 1552/3922 cut-off events. [2022-01-19 13:54:46,067 INFO L130 PetriNetUnfolder]: For 17594/17877 co-relation queries the response was YES. [2022-01-19 13:54:46,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15351 conditions, 3922 events. 1552/3922 cut-off events. For 17594/17877 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 27161 event pairs, 230 based on Foata normal form. 48/3785 useless extension candidates. Maximal degree in co-relation 15304. Up to 1298 conditions per place. [2022-01-19 13:54:46,111 INFO L132 encePairwiseOnDemand]: 242/267 looper letters, 135 selfloop transitions, 68 changer transitions 0/438 dead transitions. [2022-01-19 13:54:46,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 438 transitions, 2691 flow [2022-01-19 13:54:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 13:54:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 13:54:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3417 transitions. [2022-01-19 13:54:46,115 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7109862671660424 [2022-01-19 13:54:46,116 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3417 transitions. [2022-01-19 13:54:46,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3417 transitions. [2022-01-19 13:54:46,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:46,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3417 transitions. [2022-01-19 13:54:46,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.83333333333334) internal successors, (3417), 18 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:46,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:46,126 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:46,126 INFO L186 Difference]: Start difference. First operand has 384 places, 415 transitions, 2116 flow. Second operand 18 states and 3417 transitions. [2022-01-19 13:54:46,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 438 transitions, 2691 flow [2022-01-19 13:54:46,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 438 transitions, 2550 flow, removed 33 selfloop flow, removed 27 redundant places. [2022-01-19 13:54:46,154 INFO L242 Difference]: Finished difference. Result has 375 places, 412 transitions, 2103 flow [2022-01-19 13:54:46,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2103, PETRI_PLACES=375, PETRI_TRANSITIONS=412} [2022-01-19 13:54:46,156 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 134 predicate places. [2022-01-19 13:54:46,156 INFO L470 AbstractCegarLoop]: Abstraction has has 375 places, 412 transitions, 2103 flow [2022-01-19 13:54:46,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 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 13:54:46,157 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:46,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:46,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 13:54:46,157 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1683936119, now seen corresponding path program 1 times [2022-01-19 13:54:46,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:46,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744207906] [2022-01-19 13:54:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:46,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:54:46,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:46,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744207906] [2022-01-19 13:54:46,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744207906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:54:46,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50190943] [2022-01-19 13:54:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:46,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:46,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:54:46,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:54:46,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 13:54:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:46,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 13:54:46,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:54:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:54:47,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:54:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:54:47,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50190943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:54:47,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:54:47,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 23 [2022-01-19 13:54:47,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741841977] [2022-01-19 13:54:47,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:54:47,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 13:54:47,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 13:54:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-01-19 13:54:47,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-01-19 13:54:47,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 412 transitions, 2103 flow. Second operand has 23 states, 23 states have (on average 196.69565217391303) internal successors, (4524), 23 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:47,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:47,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-01-19 13:54:47,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:49,173 INFO L129 PetriNetUnfolder]: 1840/5514 cut-off events. [2022-01-19 13:54:49,173 INFO L130 PetriNetUnfolder]: For 24690/25105 co-relation queries the response was YES. [2022-01-19 13:54:49,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20811 conditions, 5514 events. 1840/5514 cut-off events. For 24690/25105 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 44770 event pairs, 492 based on Foata normal form. 77/5315 useless extension candidates. Maximal degree in co-relation 20764. Up to 1225 conditions per place. [2022-01-19 13:54:49,221 INFO L132 encePairwiseOnDemand]: 247/267 looper letters, 123 selfloop transitions, 54 changer transitions 110/525 dead transitions. [2022-01-19 13:54:49,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 525 transitions, 3572 flow [2022-01-19 13:54:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 13:54:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 13:54:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3945 transitions. [2022-01-19 13:54:49,227 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7387640449438202 [2022-01-19 13:54:49,227 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3945 transitions. [2022-01-19 13:54:49,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3945 transitions. [2022-01-19 13:54:49,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:49,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3945 transitions. [2022-01-19 13:54:49,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.25) internal successors, (3945), 20 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:49,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:49,240 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:49,240 INFO L186 Difference]: Start difference. First operand has 375 places, 412 transitions, 2103 flow. Second operand 20 states and 3945 transitions. [2022-01-19 13:54:49,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 525 transitions, 3572 flow [2022-01-19 13:54:49,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 525 transitions, 3435 flow, removed 5 selfloop flow, removed 15 redundant places. [2022-01-19 13:54:49,380 INFO L242 Difference]: Finished difference. Result has 382 places, 411 transitions, 2119 flow [2022-01-19 13:54:49,381 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2119, PETRI_PLACES=382, PETRI_TRANSITIONS=411} [2022-01-19 13:54:49,382 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 141 predicate places. [2022-01-19 13:54:49,382 INFO L470 AbstractCegarLoop]: Abstraction has has 382 places, 411 transitions, 2119 flow [2022-01-19 13:54:49,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 196.69565217391303) internal successors, (4524), 23 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:49,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:49,383 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:49,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 13:54:49,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 13:54:49,600 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 270605113, now seen corresponding path program 2 times [2022-01-19 13:54:49,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838024961] [2022-01-19 13:54:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:49,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-19 13:54:49,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838024961] [2022-01-19 13:54:49,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838024961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:54:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665814757] [2022-01-19 13:54:49,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 13:54:49,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:54:49,720 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:54:49,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 13:54:49,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:54:49,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:54:49,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 13:54:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:54:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-19 13:54:50,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 13:54:50,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665814757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:54:50,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 13:54:50,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-01-19 13:54:50,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357152535] [2022-01-19 13:54:50,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:54:50,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 13:54:50,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 13:54:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 13:54:50,207 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2022-01-19 13:54:50,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 411 transitions, 2119 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:50,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:50,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2022-01-19 13:54:50,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:50,981 INFO L129 PetriNetUnfolder]: 1502/4653 cut-off events. [2022-01-19 13:54:50,981 INFO L130 PetriNetUnfolder]: For 23242/23555 co-relation queries the response was YES. [2022-01-19 13:54:51,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16982 conditions, 4653 events. 1502/4653 cut-off events. For 23242/23555 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 36792 event pairs, 249 based on Foata normal form. 146/4496 useless extension candidates. Maximal degree in co-relation 16932. Up to 1030 conditions per place. [2022-01-19 13:54:51,025 INFO L132 encePairwiseOnDemand]: 263/267 looper letters, 74 selfloop transitions, 39 changer transitions 0/450 dead transitions. [2022-01-19 13:54:51,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 450 transitions, 2692 flow [2022-01-19 13:54:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 13:54:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 13:54:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2022-01-19 13:54:51,027 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9091760299625468 [2022-01-19 13:54:51,027 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2022-01-19 13:54:51,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2022-01-19 13:54:51,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:51,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2022-01-19 13:54:51,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:51,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:51,029 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:51,029 INFO L186 Difference]: Start difference. First operand has 382 places, 411 transitions, 2119 flow. Second operand 4 states and 971 transitions. [2022-01-19 13:54:51,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 450 transitions, 2692 flow [2022-01-19 13:54:51,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 450 transitions, 2598 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-01-19 13:54:51,059 INFO L242 Difference]: Finished difference. Result has 372 places, 428 transitions, 2420 flow [2022-01-19 13:54:51,060 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2420, PETRI_PLACES=372, PETRI_TRANSITIONS=428} [2022-01-19 13:54:51,060 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 131 predicate places. [2022-01-19 13:54:51,060 INFO L470 AbstractCegarLoop]: Abstraction has has 372 places, 428 transitions, 2420 flow [2022-01-19 13:54:51,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:51,061 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:51,061 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:51,085 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 13:54:51,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:51,268 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:54:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:54:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2087212167, now seen corresponding path program 3 times [2022-01-19 13:54:51,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:54:51,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006909820] [2022-01-19 13:54:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:54:51,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:54:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:54:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:54:52,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:54:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006909820] [2022-01-19 13:54:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006909820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:54:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093657653] [2022-01-19 13:54:52,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 13:54:52,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:54:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:54:52,010 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 13:54:52,011 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 13:54:52,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 13:54:52,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:54:52,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-19 13:54:52,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:54:53,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 13:54:53,511 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 44 treesize of output 32 [2022-01-19 13:54:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-19 13:54:53,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:54:54,116 INFO L353 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-01-19 13:54:54,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-01-19 13:54:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-19 13:54:54,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093657653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:54:54,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:54:54,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 9] total 39 [2022-01-19 13:54:54,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394085836] [2022-01-19 13:54:54,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:54:54,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 13:54:54,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:54:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 13:54:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-01-19 13:54:54,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2022-01-19 13:54:54,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 428 transitions, 2420 flow. Second operand has 39 states, 39 states have (on average 154.66666666666666) internal successors, (6032), 39 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:54,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:54:54,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2022-01-19 13:54:54,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:54:59,481 INFO L129 PetriNetUnfolder]: 7863/16725 cut-off events. [2022-01-19 13:54:59,481 INFO L130 PetriNetUnfolder]: For 119964/122349 co-relation queries the response was YES. [2022-01-19 13:54:59,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71724 conditions, 16725 events. 7863/16725 cut-off events. For 119964/122349 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 147542 event pairs, 1767 based on Foata normal form. 46/15175 useless extension candidates. Maximal degree in co-relation 71673. Up to 8091 conditions per place. [2022-01-19 13:54:59,679 INFO L132 encePairwiseOnDemand]: 206/267 looper letters, 355 selfloop transitions, 241 changer transitions 1/735 dead transitions. [2022-01-19 13:54:59,679 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 735 transitions, 6146 flow [2022-01-19 13:54:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-19 13:54:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-01-19 13:54:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 10059 transitions. [2022-01-19 13:54:59,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5796024200518582 [2022-01-19 13:54:59,699 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 10059 transitions. [2022-01-19 13:54:59,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 10059 transitions. [2022-01-19 13:54:59,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:54:59,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 10059 transitions. [2022-01-19 13:54:59,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 154.75384615384615) internal successors, (10059), 65 states have internal predecessors, (10059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:59,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 267.0) internal successors, (17622), 66 states have internal predecessors, (17622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:59,810 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 267.0) internal successors, (17622), 66 states have internal predecessors, (17622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:59,811 INFO L186 Difference]: Start difference. First operand has 372 places, 428 transitions, 2420 flow. Second operand 65 states and 10059 transitions. [2022-01-19 13:54:59,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 735 transitions, 6146 flow [2022-01-19 13:54:59,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 735 transitions, 5966 flow, removed 90 selfloop flow, removed 1 redundant places. [2022-01-19 13:54:59,908 INFO L242 Difference]: Finished difference. Result has 452 places, 568 transitions, 4473 flow [2022-01-19 13:54:59,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=4473, PETRI_PLACES=452, PETRI_TRANSITIONS=568} [2022-01-19 13:54:59,909 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 211 predicate places. [2022-01-19 13:54:59,909 INFO L470 AbstractCegarLoop]: Abstraction has has 452 places, 568 transitions, 4473 flow [2022-01-19 13:54:59,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 154.66666666666666) internal successors, (6032), 39 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:54:59,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:54:59,910 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:54:59,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 13:55:00,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:55:00,132 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:55:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:55:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash 439988631, now seen corresponding path program 4 times [2022-01-19 13:55:00,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:55:00,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468485083] [2022-01-19 13:55:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:55:00,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:55:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:55:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:55:00,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:55:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468485083] [2022-01-19 13:55:00,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468485083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:55:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192732649] [2022-01-19 13:55:00,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 13:55:00,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:55:00,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:55:00,731 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 13:55:00,732 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 13:55:00,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 13:55:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:55:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 76 conjunts are in the unsatisfiable core [2022-01-19 13:55:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:55:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:55:04,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:55:05,485 INFO L353 Elim1Store]: treesize reduction 46, result has 74.9 percent of original size [2022-01-19 13:55:05,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 154 [2022-01-19 13:55:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:55:07,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192732649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:55:07,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:55:07,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 18] total 63 [2022-01-19 13:55:07,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560545661] [2022-01-19 13:55:07,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:55:07,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-19 13:55:07,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:55:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-19 13:55:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=3509, Unknown=0, NotChecked=0, Total=3906 [2022-01-19 13:55:07,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2022-01-19 13:55:07,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 568 transitions, 4473 flow. Second operand has 63 states, 63 states have (on average 153.34920634920636) internal successors, (9661), 63 states have internal predecessors, (9661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:07,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:55:07,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2022-01-19 13:55:07,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:55:20,754 INFO L129 PetriNetUnfolder]: 14297/31399 cut-off events. [2022-01-19 13:55:20,755 INFO L130 PetriNetUnfolder]: For 303808/310084 co-relation queries the response was YES. [2022-01-19 13:55:21,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159095 conditions, 31399 events. 14297/31399 cut-off events. For 303808/310084 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 319645 event pairs, 1809 based on Foata normal form. 610/30014 useless extension candidates. Maximal degree in co-relation 159027. Up to 12972 conditions per place. [2022-01-19 13:55:21,312 INFO L132 encePairwiseOnDemand]: 211/267 looper letters, 809 selfloop transitions, 533 changer transitions 12/1493 dead transitions. [2022-01-19 13:55:21,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1493 transitions, 16541 flow [2022-01-19 13:55:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-19 13:55:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2022-01-19 13:55:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 18359 transitions. [2022-01-19 13:55:21,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5778176439114971 [2022-01-19 13:55:21,331 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 18359 transitions. [2022-01-19 13:55:21,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 18359 transitions. [2022-01-19 13:55:21,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:55:21,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 18359 transitions. [2022-01-19 13:55:21,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 154.27731092436974) internal successors, (18359), 119 states have internal predecessors, (18359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:21,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 267.0) internal successors, (32040), 120 states have internal predecessors, (32040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:21,402 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 267.0) internal successors, (32040), 120 states have internal predecessors, (32040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:21,403 INFO L186 Difference]: Start difference. First operand has 452 places, 568 transitions, 4473 flow. Second operand 119 states and 18359 transitions. [2022-01-19 13:55:21,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1493 transitions, 16541 flow [2022-01-19 13:55:22,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1493 transitions, 15685 flow, removed 325 selfloop flow, removed 36 redundant places. [2022-01-19 13:55:22,203 INFO L242 Difference]: Finished difference. Result has 573 places, 1059 transitions, 10919 flow [2022-01-19 13:55:22,204 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=10919, PETRI_PLACES=573, PETRI_TRANSITIONS=1059} [2022-01-19 13:55:22,204 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 332 predicate places. [2022-01-19 13:55:22,204 INFO L470 AbstractCegarLoop]: Abstraction has has 573 places, 1059 transitions, 10919 flow [2022-01-19 13:55:22,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 153.34920634920636) internal successors, (9661), 63 states have internal predecessors, (9661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:22,206 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:55:22,206 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:55:22,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-19 13:55:22,406 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,SelfDestructingSolverStorable15 [2022-01-19 13:55:22,407 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:55:22,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:55:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1521122959, now seen corresponding path program 5 times [2022-01-19 13:55:22,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:55:22,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169924844] [2022-01-19 13:55:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:55:22,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:55:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:55:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:55:22,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:55:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169924844] [2022-01-19 13:55:22,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169924844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:55:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591323358] [2022-01-19 13:55:22,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 13:55:22,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:55:22,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:55:22,985 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 13:55:22,986 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 13:55:23,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 13:55:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:55:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-19 13:55:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:55:24,615 INFO L353 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2022-01-19 13:55:24,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 99 [2022-01-19 13:55:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:55:24,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:55:25,501 INFO L353 Elim1Store]: treesize reduction 32, result has 82.1 percent of original size [2022-01-19 13:55:25,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 165 [2022-01-19 13:55:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:55:26,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591323358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:55:26,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:55:26,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 18] total 51 [2022-01-19 13:55:26,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656094631] [2022-01-19 13:55:26,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:55:26,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-19 13:55:26,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:55:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-19 13:55:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2254, Unknown=0, NotChecked=0, Total=2550 [2022-01-19 13:55:26,867 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2022-01-19 13:55:26,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1059 transitions, 10919 flow. Second operand has 51 states, 51 states have (on average 153.52941176470588) internal successors, (7830), 51 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:26,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:55:26,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2022-01-19 13:55:26,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:55:40,367 INFO L129 PetriNetUnfolder]: 17378/38071 cut-off events. [2022-01-19 13:55:40,367 INFO L130 PetriNetUnfolder]: For 594073/606233 co-relation queries the response was YES. [2022-01-19 13:55:41,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230265 conditions, 38071 events. 17378/38071 cut-off events. For 594073/606233 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 396618 event pairs, 2017 based on Foata normal form. 1019/36849 useless extension candidates. Maximal degree in co-relation 230159. Up to 19845 conditions per place. [2022-01-19 13:55:41,339 INFO L132 encePairwiseOnDemand]: 210/267 looper letters, 975 selfloop transitions, 679 changer transitions 7/1801 dead transitions. [2022-01-19 13:55:41,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 1801 transitions, 23614 flow [2022-01-19 13:55:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 13:55:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 13:55:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 8831 transitions. [2022-01-19 13:55:41,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5802615152112491 [2022-01-19 13:55:41,347 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 8831 transitions. [2022-01-19 13:55:41,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 8831 transitions. [2022-01-19 13:55:41,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:55:41,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 8831 transitions. [2022-01-19 13:55:41,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 154.9298245614035) internal successors, (8831), 57 states have internal predecessors, (8831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:41,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 267.0) internal successors, (15486), 58 states have internal predecessors, (15486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:41,369 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 267.0) internal successors, (15486), 58 states have internal predecessors, (15486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:41,369 INFO L186 Difference]: Start difference. First operand has 573 places, 1059 transitions, 10919 flow. Second operand 57 states and 8831 transitions. [2022-01-19 13:55:41,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 1801 transitions, 23614 flow [2022-01-19 13:55:43,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1801 transitions, 22194 flow, removed 645 selfloop flow, removed 26 redundant places. [2022-01-19 13:55:43,556 INFO L242 Difference]: Finished difference. Result has 621 places, 1557 transitions, 19656 flow [2022-01-19 13:55:43,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=10141, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=19656, PETRI_PLACES=621, PETRI_TRANSITIONS=1557} [2022-01-19 13:55:43,558 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 380 predicate places. [2022-01-19 13:55:43,558 INFO L470 AbstractCegarLoop]: Abstraction has has 621 places, 1557 transitions, 19656 flow [2022-01-19 13:55:43,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 153.52941176470588) internal successors, (7830), 51 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:43,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:55:43,560 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:55:43,586 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 13:55:43,775 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,SelfDestructingSolverStorable16 [2022-01-19 13:55:43,776 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:55:43,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:55:43,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2103761005, now seen corresponding path program 6 times [2022-01-19 13:55:43,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:55:43,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851251905] [2022-01-19 13:55:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:55:43,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:55:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:55:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:55:44,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:55:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851251905] [2022-01-19 13:55:44,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851251905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:55:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061741467] [2022-01-19 13:55:44,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 13:55:44,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:55:44,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:55:44,403 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 13:55:44,404 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 13:55:44,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 13:55:44,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:55:44,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 77 conjunts are in the unsatisfiable core [2022-01-19 13:55:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:55:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:55:50,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:55:50,911 INFO L353 Elim1Store]: treesize reduction 44, result has 75.4 percent of original size [2022-01-19 13:55:50,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 152 [2022-01-19 13:55:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:55:53,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061741467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:55:53,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:55:53,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 26] total 75 [2022-01-19 13:55:53,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052610120] [2022-01-19 13:55:53,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:55:53,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-19 13:55:53,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:55:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-19 13:55:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=4946, Unknown=1, NotChecked=0, Total=5550 [2022-01-19 13:55:53,329 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2022-01-19 13:55:53,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1557 transitions, 19656 flow. Second operand has 75 states, 75 states have (on average 152.93333333333334) internal successors, (11470), 75 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:55:53,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:55:53,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2022-01-19 13:55:53,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:56:16,064 INFO L129 PetriNetUnfolder]: 18879/41495 cut-off events. [2022-01-19 13:56:16,071 INFO L130 PetriNetUnfolder]: For 811262/827630 co-relation queries the response was YES. [2022-01-19 13:56:17,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277013 conditions, 41495 events. 18879/41495 cut-off events. For 811262/827630 co-relation queries the response was YES. Maximal size of possible extension queue 1688. Compared 440377 event pairs, 2457 based on Foata normal form. 1085/40071 useless extension candidates. Maximal degree in co-relation 276892. Up to 25887 conditions per place. [2022-01-19 13:56:17,421 INFO L132 encePairwiseOnDemand]: 210/267 looper letters, 1383 selfloop transitions, 847 changer transitions 7/2376 dead transitions. [2022-01-19 13:56:17,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 2376 transitions, 35010 flow [2022-01-19 13:56:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-19 13:56:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-01-19 13:56:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 17089 transitions. [2022-01-19 13:56:17,435 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5766103181833518 [2022-01-19 13:56:17,435 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 17089 transitions. [2022-01-19 13:56:17,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 17089 transitions. [2022-01-19 13:56:17,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:56:17,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 17089 transitions. [2022-01-19 13:56:17,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 153.95495495495496) internal successors, (17089), 111 states have internal predecessors, (17089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:56:17,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 267.0) internal successors, (29904), 112 states have internal predecessors, (29904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:56:17,486 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 267.0) internal successors, (29904), 112 states have internal predecessors, (29904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:56:17,486 INFO L186 Difference]: Start difference. First operand has 621 places, 1557 transitions, 19656 flow. Second operand 111 states and 17089 transitions. [2022-01-19 13:56:17,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 2376 transitions, 35010 flow [2022-01-19 13:56:22,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 2376 transitions, 32972 flow, removed 921 selfloop flow, removed 35 redundant places. [2022-01-19 13:56:22,586 INFO L242 Difference]: Finished difference. Result has 722 places, 2088 transitions, 29155 flow [2022-01-19 13:56:22,588 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=18437, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=958, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=29155, PETRI_PLACES=722, PETRI_TRANSITIONS=2088} [2022-01-19 13:56:22,588 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 481 predicate places. [2022-01-19 13:56:22,588 INFO L470 AbstractCegarLoop]: Abstraction has has 722 places, 2088 transitions, 29155 flow [2022-01-19 13:56:22,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 152.93333333333334) internal successors, (11470), 75 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:56:22,590 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:56:22,590 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:56:22,611 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 13:56:22,802 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,SelfDestructingSolverStorable17 [2022-01-19 13:56:22,803 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:56:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:56:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1856189313, now seen corresponding path program 7 times [2022-01-19 13:56:22,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:56:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193356283] [2022-01-19 13:56:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:56:22,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:56:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:56:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-19 13:56:23,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:56:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193356283] [2022-01-19 13:56:23,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193356283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:56:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40954320] [2022-01-19 13:56:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 13:56:23,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:56:23,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:56:23,016 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 13:56:23,051 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 13:56:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:56:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 82 conjunts are in the unsatisfiable core [2022-01-19 13:56:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:56:25,582 INFO L353 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2022-01-19 13:56:25,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 36 [2022-01-19 13:56:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:56:25,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:56:26,200 INFO L353 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-01-19 13:56:26,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-01-19 13:56:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:56:28,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40954320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:56:28,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:56:28,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 30, 18] total 51 [2022-01-19 13:56:28,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637257515] [2022-01-19 13:56:28,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:56:28,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-19 13:56:28,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:56:28,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-19 13:56:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-01-19 13:56:28,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 267 [2022-01-19 13:56:28,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 2088 transitions, 29155 flow. Second operand has 51 states, 51 states have (on average 137.62745098039215) internal successors, (7019), 51 states have internal predecessors, (7019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:56:28,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:56:28,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 267 [2022-01-19 13:56:28,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:56:57,562 INFO L129 PetriNetUnfolder]: 23714/51202 cut-off events. [2022-01-19 13:56:57,563 INFO L130 PetriNetUnfolder]: For 1224362/1253485 co-relation queries the response was YES. [2022-01-19 13:56:59,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366485 conditions, 51202 events. 23714/51202 cut-off events. For 1224362/1253485 co-relation queries the response was YES. Maximal size of possible extension queue 2040. Compared 551735 event pairs, 2466 based on Foata normal form. 2230/50593 useless extension candidates. Maximal degree in co-relation 366338. Up to 30784 conditions per place. [2022-01-19 13:57:00,212 INFO L132 encePairwiseOnDemand]: 215/267 looper letters, 2180 selfloop transitions, 936 changer transitions 3/3260 dead transitions. [2022-01-19 13:57:00,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 3260 transitions, 52222 flow [2022-01-19 13:57:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-19 13:57:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-01-19 13:57:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 10753 transitions. [2022-01-19 13:57:00,225 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5163257466628253 [2022-01-19 13:57:00,225 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 10753 transitions. [2022-01-19 13:57:00,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 10753 transitions. [2022-01-19 13:57:00,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:57:00,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 10753 transitions. [2022-01-19 13:57:00,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 137.85897435897436) internal successors, (10753), 78 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:57:00,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 267.0) internal successors, (21093), 79 states have internal predecessors, (21093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:57:00,256 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 267.0) internal successors, (21093), 79 states have internal predecessors, (21093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:57:00,256 INFO L186 Difference]: Start difference. First operand has 722 places, 2088 transitions, 29155 flow. Second operand 78 states and 10753 transitions. [2022-01-19 13:57:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 3260 transitions, 52222 flow [2022-01-19 13:57:11,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 3260 transitions, 49931 flow, removed 1030 selfloop flow, removed 73 redundant places. [2022-01-19 13:57:11,716 INFO L242 Difference]: Finished difference. Result has 746 places, 2826 transitions, 42621 flow [2022-01-19 13:57:11,717 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=27736, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=42621, PETRI_PLACES=746, PETRI_TRANSITIONS=2826} [2022-01-19 13:57:11,718 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 505 predicate places. [2022-01-19 13:57:11,718 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 2826 transitions, 42621 flow [2022-01-19 13:57:11,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 137.62745098039215) internal successors, (7019), 51 states have internal predecessors, (7019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:57:11,719 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:57:11,719 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:57:11,740 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 13:57:11,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:57:11,932 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:57:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:57:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1953031935, now seen corresponding path program 8 times [2022-01-19 13:57:11,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:57:11,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866211573] [2022-01-19 13:57:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:57:11,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:57:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:57:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:57:13,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:57:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866211573] [2022-01-19 13:57:13,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866211573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:57:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564836271] [2022-01-19 13:57:13,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 13:57:13,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:57:13,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:57:13,126 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 13:57:13,126 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 13:57:13,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:57:13,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:57:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 76 conjunts are in the unsatisfiable core [2022-01-19 13:57:13,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:57:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:57:16,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:57:16,766 INFO L353 Elim1Store]: treesize reduction 46, result has 74.9 percent of original size [2022-01-19 13:57:16,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 154 [2022-01-19 13:57:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:57:18,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564836271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:57:18,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:57:18,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 26, 18] total 77 [2022-01-19 13:57:18,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589122482] [2022-01-19 13:57:18,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:57:18,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-19 13:57:18,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:57:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-19 13:57:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=5363, Unknown=0, NotChecked=0, Total=5852 [2022-01-19 13:57:18,221 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2022-01-19 13:57:18,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 2826 transitions, 42621 flow. Second operand has 77 states, 77 states have (on average 151.83116883116884) internal successors, (11691), 77 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:57:18,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:57:18,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2022-01-19 13:57:18,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:58:02,118 INFO L129 PetriNetUnfolder]: 29029/62475 cut-off events. [2022-01-19 13:58:02,119 INFO L130 PetriNetUnfolder]: For 1795323/1848380 co-relation queries the response was YES. [2022-01-19 13:58:05,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 488582 conditions, 62475 events. 29029/62475 cut-off events. For 1795323/1848380 co-relation queries the response was YES. Maximal size of possible extension queue 2566. Compared 695198 event pairs, 2356 based on Foata normal form. 4951/64316 useless extension candidates. Maximal degree in co-relation 488416. Up to 31496 conditions per place. [2022-01-19 13:58:05,772 INFO L132 encePairwiseOnDemand]: 202/267 looper letters, 2468 selfloop transitions, 2119 changer transitions 4/4728 dead transitions. [2022-01-19 13:58:05,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 4728 transitions, 84341 flow [2022-01-19 13:58:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-19 13:58:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2022-01-19 13:58:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 23433 transitions. [2022-01-19 13:58:05,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5736212087831387 [2022-01-19 13:58:05,819 INFO L72 ComplementDD]: Start complementDD. Operand 153 states and 23433 transitions. [2022-01-19 13:58:05,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 153 states and 23433 transitions. [2022-01-19 13:58:05,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:58:05,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 153 states and 23433 transitions. [2022-01-19 13:58:06,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 154 states, 153 states have (on average 153.15686274509804) internal successors, (23433), 153 states have internal predecessors, (23433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:58:06,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 154 states, 154 states have (on average 267.0) internal successors, (41118), 154 states have internal predecessors, (41118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:58:06,195 INFO L81 ComplementDD]: Finished complementDD. Result has 154 states, 154 states have (on average 267.0) internal successors, (41118), 154 states have internal predecessors, (41118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:58:06,196 INFO L186 Difference]: Start difference. First operand has 746 places, 2826 transitions, 42621 flow. Second operand 153 states and 23433 transitions. [2022-01-19 13:58:06,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 4728 transitions, 84341 flow [2022-01-19 13:58:28,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 4728 transitions, 82171 flow, removed 1003 selfloop flow, removed 55 redundant places. [2022-01-19 13:58:28,860 INFO L242 Difference]: Finished difference. Result has 898 places, 4196 transitions, 74681 flow [2022-01-19 13:58:28,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=41161, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=153, PETRI_FLOW=74681, PETRI_PLACES=898, PETRI_TRANSITIONS=4196} [2022-01-19 13:58:28,863 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 657 predicate places. [2022-01-19 13:58:28,863 INFO L470 AbstractCegarLoop]: Abstraction has has 898 places, 4196 transitions, 74681 flow [2022-01-19 13:58:28,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 151.83116883116884) internal successors, (11691), 77 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:58:28,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:58:28,865 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:58:28,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-19 13:58:29,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:58:29,079 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 13:58:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:58:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash -784205407, now seen corresponding path program 9 times [2022-01-19 13:58:29,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:58:29,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431699992] [2022-01-19 13:58:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:58:29,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:58:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:58:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 13:58:30,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:58:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431699992] [2022-01-19 13:58:30,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431699992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:58:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249913059] [2022-01-19 13:58:30,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 13:58:30,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:58:30,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:58:30,206 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 13:58:30,208 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 13:58:30,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 13:58:30,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:58:30,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-19 13:58:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:58:31,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 13:58:31,422 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 44 treesize of output 32 [2022-01-19 13:58:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 13:58:31,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:58:32,537 INFO L353 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-01-19 13:58:32,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-01-19 13:58:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-19 13:58:33,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249913059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:58:33,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:58:33,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 23, 9] total 55 [2022-01-19 13:58:33,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044648177] [2022-01-19 13:58:33,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:58:33,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-19 13:58:33,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:58:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-19 13:58:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2780, Unknown=0, NotChecked=0, Total=2970 [2022-01-19 13:58:33,329 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2022-01-19 13:58:33,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 898 places, 4196 transitions, 74681 flow. Second operand has 55 states, 55 states have (on average 152.83636363636364) internal successors, (8406), 55 states have internal predecessors, (8406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:58:33,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:58:33,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2022-01-19 13:58:33,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand