/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 22:08:07,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 22:08:07,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 22:08:07,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 22:08:07,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 22:08:07,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 22:08:07,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 22:08:07,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 22:08:07,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 22:08:07,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 22:08:07,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 22:08:07,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 22:08:07,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 22:08:07,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 22:08:07,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 22:08:07,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 22:08:07,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 22:08:07,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 22:08:07,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 22:08:07,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 22:08:07,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 22:08:07,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 22:08:07,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 22:08:07,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 22:08:07,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 22:08:07,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 22:08:07,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 22:08:07,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 22:08:07,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 22:08:07,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 22:08:07,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 22:08:07,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 22:08:07,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 22:08:07,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 22:08:07,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 22:08:07,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 22:08:07,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 22:08:07,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 22:08:07,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 22:08:07,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 22:08:07,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 22:08:07,139 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-SemanticLbe.epf [2022-12-05 22:08:07,163 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 22:08:07,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 22:08:07,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 22:08:07,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 22:08:07,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 22:08:07,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 22:08:07,165 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 22:08:07,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 22:08:07,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 22:08:07,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 22:08:07,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 22:08:07,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 22:08:07,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 22:08:07,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 22:08:07,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 22:08:07,167 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 22:08:07,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 22:08:07,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 22:08:07,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 22:08:07,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 22:08:07,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 22:08:07,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 22:08:07,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 22:08:07,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:08:07,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 22:08:07,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 22:08:07,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 22:08:07,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 22:08:07,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 22:08:07,169 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 22:08:07,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 22:08:07,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 22:08:07,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 22:08:07,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 22:08:07,436 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 22:08:07,437 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 22:08:07,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2022-12-05 22:08:08,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 22:08:08,615 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 22:08:08,616 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2022-12-05 22:08:08,621 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c2a8db22/b068b85e4f094136839657ce32f092cc/FLAG08ddf2155 [2022-12-05 22:08:08,632 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c2a8db22/b068b85e4f094136839657ce32f092cc [2022-12-05 22:08:08,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 22:08:08,634 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 22:08:08,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 22:08:08,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 22:08:08,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 22:08:08,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a48bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08, skipping insertion in model container [2022-12-05 22:08:08,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 22:08:08,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 22:08:08,753 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:08,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:08,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:08,761 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:08,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:08,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:08,766 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-12-05 22:08:08,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:08:08,777 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 22:08:08,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:08,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:08,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:08,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:08,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:08,789 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:08,791 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-12-05 22:08:08,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:08:08,802 INFO L208 MainTranslator]: Completed translation [2022-12-05 22:08:08,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08 WrapperNode [2022-12-05 22:08:08,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 22:08:08,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 22:08:08,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 22:08:08,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 22:08:08,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,831 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2022-12-05 22:08:08,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 22:08:08,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 22:08:08,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 22:08:08,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 22:08:08,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,874 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 22:08:08,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 22:08:08,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 22:08:08,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 22:08:08,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (1/1) ... [2022-12-05 22:08:08,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:08:08,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:08,905 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) [2022-12-05 22:08:08,924 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 [2022-12-05 22:08:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 22:08:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 22:08:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 22:08:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 22:08:08,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 22:08:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 22:08:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 22:08:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 22:08:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 22:08:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 22:08:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 22:08:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 22:08:08,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 22:08:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 22:08:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 22:08:08,941 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 22:08:09,040 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 22:08:09,041 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 22:08:09,236 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 22:08:09,309 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 22:08:09,309 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-05 22:08:09,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:08:09 BoogieIcfgContainer [2022-12-05 22:08:09,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 22:08:09,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 22:08:09,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 22:08:09,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 22:08:09,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 10:08:08" (1/3) ... [2022-12-05 22:08:09,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df97b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:08:09, skipping insertion in model container [2022-12-05 22:08:09,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:08" (2/3) ... [2022-12-05 22:08:09,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df97b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:08:09, skipping insertion in model container [2022-12-05 22:08:09,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:08:09" (3/3) ... [2022-12-05 22:08:09,316 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-12-05 22:08:09,328 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 22:08:09,328 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 22:08:09,329 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 22:08:09,380 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 22:08:09,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 122 transitions, 260 flow [2022-12-05 22:08:09,470 INFO L130 PetriNetUnfolder]: 11/120 cut-off events. [2022-12-05 22:08:09,470 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:08:09,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 120 events. 11/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 77. Up to 2 conditions per place. [2022-12-05 22:08:09,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 122 transitions, 260 flow [2022-12-05 22:08:09,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 112 transitions, 236 flow [2022-12-05 22:08:09,479 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:08:09,492 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 112 transitions, 236 flow [2022-12-05 22:08:09,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 112 transitions, 236 flow [2022-12-05 22:08:09,527 INFO L130 PetriNetUnfolder]: 11/112 cut-off events. [2022-12-05 22:08:09,528 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:08:09,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 112 events. 11/112 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 77. Up to 2 conditions per place. [2022-12-05 22:08:09,531 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 112 transitions, 236 flow [2022-12-05 22:08:09,532 INFO L188 LiptonReduction]: Number of co-enabled transitions 704 [2022-12-05 22:08:13,414 INFO L203 LiptonReduction]: Total number of compositions: 96 [2022-12-05 22:08:13,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:08:13,429 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4bd76637, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:08:13,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 22:08:13,432 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2022-12-05 22:08:13,432 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:08:13,432 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:13,433 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:13,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1610035340, now seen corresponding path program 1 times [2022-12-05 22:08:13,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:13,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345835606] [2022-12-05 22:08:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:13,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:13,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:13,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345835606] [2022-12-05 22:08:13,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345835606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:08:13,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:08:13,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 22:08:13,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174114915] [2022-12-05 22:08:13,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:13,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:08:13,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:08:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:08:13,724 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 16 [2022-12-05 22:08:13,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:13,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:13,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 16 [2022-12-05 22:08:13,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:13,793 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2022-12-05 22:08:13,793 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-05 22:08:13,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 335 event pairs, 13 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2022-12-05 22:08:13,795 INFO L137 encePairwiseOnDemand]: 13/16 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2022-12-05 22:08:13,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2022-12-05 22:08:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:08:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:08:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 29 transitions. [2022-12-05 22:08:13,803 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2022-12-05 22:08:13,804 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 29 transitions. [2022-12-05 22:08:13,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2022-12-05 22:08:13,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 22:08:13,808 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2022-12-05 22:08:13,809 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2022-12-05 22:08:13,814 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-12-05 22:08:13,814 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2022-12-05 22:08:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:13,815 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:13,815 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 22:08:13,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:13,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1695124947, now seen corresponding path program 1 times [2022-12-05 22:08:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:13,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797703373] [2022-12-05 22:08:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:13,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:13,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797703373] [2022-12-05 22:08:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797703373] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:08:13,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:08:13,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 22:08:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669261912] [2022-12-05 22:08:13,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:13,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:08:13,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:08:13,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:08:13,912 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 16 [2022-12-05 22:08:13,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:13,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:13,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 16 [2022-12-05 22:08:13,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:13,943 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2022-12-05 22:08:13,943 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-05 22:08:13,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 226 event pairs, 15 based on Foata normal form. 6/83 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2022-12-05 22:08:13,944 INFO L137 encePairwiseOnDemand]: 13/16 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2022-12-05 22:08:13,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2022-12-05 22:08:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:08:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:08:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-05 22:08:13,945 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2022-12-05 22:08:13,945 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 26 transitions. [2022-12-05 22:08:13,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2022-12-05 22:08:13,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:08:13,946 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2022-12-05 22:08:13,946 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2022-12-05 22:08:13,947 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2022-12-05 22:08:13,947 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2022-12-05 22:08:13,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:13,947 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:13,947 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:13,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 22:08:13,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1003160808, now seen corresponding path program 1 times [2022-12-05 22:08:13,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:13,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898225460] [2022-12-05 22:08:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:13,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:14,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:14,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898225460] [2022-12-05 22:08:14,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898225460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:08:14,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:08:14,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:08:14,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271736900] [2022-12-05 22:08:14,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:14,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:08:14,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:08:14,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:08:14,101 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 16 [2022-12-05 22:08:14,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:14,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:14,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 16 [2022-12-05 22:08:14,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:14,163 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2022-12-05 22:08:14,163 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-05 22:08:14,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 394 event pairs, 40 based on Foata normal form. 6/130 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2022-12-05 22:08:14,164 INFO L137 encePairwiseOnDemand]: 12/16 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2022-12-05 22:08:14,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2022-12-05 22:08:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:08:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:08:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 31 transitions. [2022-12-05 22:08:14,168 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.484375 [2022-12-05 22:08:14,168 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 31 transitions. [2022-12-05 22:08:14,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2022-12-05 22:08:14,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:08:14,170 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2022-12-05 22:08:14,170 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2022-12-05 22:08:14,171 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-12-05 22:08:14,172 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2022-12-05 22:08:14,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:14,172 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:14,172 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:14,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 22:08:14,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:14,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1749645767, now seen corresponding path program 1 times [2022-12-05 22:08:14,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:14,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510955384] [2022-12-05 22:08:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:14,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:14,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:14,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510955384] [2022-12-05 22:08:14,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510955384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:14,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818572770] [2022-12-05 22:08:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:14,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:14,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:14,800 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) [2022-12-05 22:08:14,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 22:08:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 22:08:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:15,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-05 22:08:15,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:08:15,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:08:15,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-05 22:08:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:15,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:15,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:15,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-12-05 22:08:15,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:15,532 INFO L350 Elim1Store]: Elim1 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 325 treesize of output 305 [2022-12-05 22:08:15,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:15,543 INFO L350 Elim1Store]: Elim1 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 293 treesize of output 257 [2022-12-05 22:08:15,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:15,553 INFO L350 Elim1Store]: Elim1 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 245 treesize of output 233 [2022-12-05 22:08:15,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:15,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-12-05 22:08:15,721 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-05 22:08:15,722 INFO L350 Elim1Store]: Elim1 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 153 treesize of output 141 [2022-12-05 22:08:15,730 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-05 22:08:15,731 INFO L350 Elim1Store]: Elim1 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 137 treesize of output 117 [2022-12-05 22:08:15,740 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-05 22:08:15,741 INFO L350 Elim1Store]: Elim1 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 113 treesize of output 105 [2022-12-05 22:08:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:15,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818572770] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:15,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:15,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-05 22:08:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738812117] [2022-12-05 22:08:15,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:15,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 22:08:15,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:15,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 22:08:15,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=352, Unknown=2, NotChecked=0, Total=462 [2022-12-05 22:08:15,846 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:15,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:15,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:15,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:15,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:16,912 WARN L837 $PredicateComparison]: unable to prove that (and (<= 1 c_~sum~0) (or (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (< (+ c_~sum~0 (select .cse0 .cse1)) 0)) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (not (< 1 (+ c_~sum~0 (select .cse3 .cse1))))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (not (< c_~back~0 c_~n~0)) (not (<= 0 c_~back~0))) (<= c_~sum~0 1)) is different from false [2022-12-05 22:08:17,237 INFO L130 PetriNetUnfolder]: 261/507 cut-off events. [2022-12-05 22:08:17,237 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-12-05 22:08:17,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 507 events. 261/507 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2280 event pairs, 30 based on Foata normal form. 5/508 useless extension candidates. Maximal degree in co-relation 1206. Up to 114 conditions per place. [2022-12-05 22:08:17,239 INFO L137 encePairwiseOnDemand]: 5/16 looper letters, 56 selfloop transitions, 31 changer transitions 61/148 dead transitions. [2022-12-05 22:08:17,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 148 transitions, 727 flow [2022-12-05 22:08:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-05 22:08:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-05 22:08:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 151 transitions. [2022-12-05 22:08:17,241 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41032608695652173 [2022-12-05 22:08:17,241 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 23 states and 151 transitions. [2022-12-05 22:08:17,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 148 transitions, 727 flow [2022-12-05 22:08:17,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 148 transitions, 715 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-05 22:08:17,244 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 313 flow [2022-12-05 22:08:17,244 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=313, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2022-12-05 22:08:17,245 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2022-12-05 22:08:17,245 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 313 flow [2022-12-05 22:08:17,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:17,245 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:17,245 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:17,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-05 22:08:17,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:17,449 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:17,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1615934272, now seen corresponding path program 2 times [2022-12-05 22:08:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:17,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201647694] [2022-12-05 22:08:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:17,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:17,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201647694] [2022-12-05 22:08:17,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201647694] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:17,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490003125] [2022-12-05 22:08:17,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:08:17,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:17,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:17,571 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) [2022-12-05 22:08:17,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 22:08:17,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:08:17,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:17,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:08:17,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:17,692 INFO L350 Elim1Store]: Elim1 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 124 treesize of output 92 [2022-12-05 22:08:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:17,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:17,765 INFO L350 Elim1Store]: Elim1 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 136 treesize of output 104 [2022-12-05 22:08:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:17,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490003125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:17,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:17,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 11 [2022-12-05 22:08:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183803959] [2022-12-05 22:08:17,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:17,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 22:08:17,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 22:08:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-05 22:08:17,800 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 16 [2022-12-05 22:08:17,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:17,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:17,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 16 [2022-12-05 22:08:17,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:17,965 INFO L130 PetriNetUnfolder]: 331/659 cut-off events. [2022-12-05 22:08:17,965 INFO L131 PetriNetUnfolder]: For 1465/1479 co-relation queries the response was YES. [2022-12-05 22:08:17,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2550 conditions, 659 events. 331/659 cut-off events. For 1465/1479 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3272 event pairs, 76 based on Foata normal form. 24/671 useless extension candidates. Maximal degree in co-relation 2492. Up to 413 conditions per place. [2022-12-05 22:08:17,969 INFO L137 encePairwiseOnDemand]: 11/16 looper letters, 58 selfloop transitions, 23 changer transitions 5/90 dead transitions. [2022-12-05 22:08:17,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 717 flow [2022-12-05 22:08:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 22:08:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 22:08:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2022-12-05 22:08:17,972 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2022-12-05 22:08:17,972 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 313 flow. Second operand 9 states and 73 transitions. [2022-12-05 22:08:17,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 717 flow [2022-12-05 22:08:17,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 90 transitions, 671 flow, removed 22 selfloop flow, removed 3 redundant places. [2022-12-05 22:08:17,980 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 406 flow [2022-12-05 22:08:17,980 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2022-12-05 22:08:17,982 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2022-12-05 22:08:17,982 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 406 flow [2022-12-05 22:08:17,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:17,982 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:17,982 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:18,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:18,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:18,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash -443836876, now seen corresponding path program 3 times [2022-12-05 22:08:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:18,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672318710] [2022-12-05 22:08:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:18,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:18,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:18,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672318710] [2022-12-05 22:08:18,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672318710] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:18,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161809086] [2022-12-05 22:08:18,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:08:18,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:18,297 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) [2022-12-05 22:08:18,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 22:08:18,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 22:08:18,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:08:18,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:18,435 INFO L350 Elim1Store]: Elim1 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 124 treesize of output 92 [2022-12-05 22:08:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:18,533 INFO L350 Elim1Store]: Elim1 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 136 treesize of output 104 [2022-12-05 22:08:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:18,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161809086] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:18,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:18,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-05 22:08:18,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41658863] [2022-12-05 22:08:18,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:18,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 22:08:18,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:18,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 22:08:18,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-05 22:08:18,572 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 16 [2022-12-05 22:08:18,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 406 flow. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:18,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:18,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 16 [2022-12-05 22:08:18,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:18,710 INFO L130 PetriNetUnfolder]: 229/473 cut-off events. [2022-12-05 22:08:18,710 INFO L131 PetriNetUnfolder]: For 1213/1227 co-relation queries the response was YES. [2022-12-05 22:08:18,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1880 conditions, 473 events. 229/473 cut-off events. For 1213/1227 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2227 event pairs, 154 based on Foata normal form. 12/473 useless extension candidates. Maximal degree in co-relation 1841. Up to 389 conditions per place. [2022-12-05 22:08:18,713 INFO L137 encePairwiseOnDemand]: 12/16 looper letters, 31 selfloop transitions, 3 changer transitions 19/56 dead transitions. [2022-12-05 22:08:18,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 460 flow [2022-12-05 22:08:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 22:08:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 22:08:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-12-05 22:08:18,714 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4375 [2022-12-05 22:08:18,714 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 406 flow. Second operand 6 states and 42 transitions. [2022-12-05 22:08:18,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 460 flow [2022-12-05 22:08:18,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 427 flow, removed 11 selfloop flow, removed 7 redundant places. [2022-12-05 22:08:18,717 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 254 flow [2022-12-05 22:08:18,718 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2022-12-05 22:08:18,718 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2022-12-05 22:08:18,718 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 254 flow [2022-12-05 22:08:18,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:18,719 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:18,719 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:18,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:18,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:18,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1151820280, now seen corresponding path program 4 times [2022-12-05 22:08:18,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:18,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764949604] [2022-12-05 22:08:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:19,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:19,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764949604] [2022-12-05 22:08:19,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764949604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:19,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927715750] [2022-12-05 22:08:19,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:08:19,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:19,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:19,840 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) [2022-12-05 22:08:19,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 22:08:19,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:08:19,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-05 22:08:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:20,048 INFO L350 Elim1Store]: Elim1 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 [2022-12-05 22:08:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:20,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:20,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:20,129 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 50 [2022-12-05 22:08:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-05 22:08:20,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927715750] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:20,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:20,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2022-12-05 22:08:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611784561] [2022-12-05 22:08:20,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:20,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 22:08:20,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 22:08:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-12-05 22:08:20,228 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:20,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 254 flow. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:20,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:20,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:20,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:21,114 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2022-12-05 22:08:21,114 INFO L131 PetriNetUnfolder]: For 825/825 co-relation queries the response was YES. [2022-12-05 22:08:21,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 613 events. 313/613 cut-off events. For 825/825 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2864 event pairs, 36 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 2226. Up to 381 conditions per place. [2022-12-05 22:08:21,117 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 48 selfloop transitions, 26 changer transitions 44/118 dead transitions. [2022-12-05 22:08:21,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 118 transitions, 847 flow [2022-12-05 22:08:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 22:08:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 22:08:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 105 transitions. [2022-12-05 22:08:21,118 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3860294117647059 [2022-12-05 22:08:21,118 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 254 flow. Second operand 17 states and 105 transitions. [2022-12-05 22:08:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 118 transitions, 847 flow [2022-12-05 22:08:21,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 118 transitions, 819 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-05 22:08:21,121 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 388 flow [2022-12-05 22:08:21,122 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=388, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2022-12-05 22:08:21,122 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2022-12-05 22:08:21,122 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 388 flow [2022-12-05 22:08:21,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:21,122 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:21,122 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:21,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:21,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:21,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash 422637532, now seen corresponding path program 5 times [2022-12-05 22:08:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:21,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729964496] [2022-12-05 22:08:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:22,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729964496] [2022-12-05 22:08:22,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729964496] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267844218] [2022-12-05 22:08:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:08:22,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:22,122 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) [2022-12-05 22:08:22,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 22:08:22,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:08:22,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 22:08:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:22,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:22,340 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 14 [2022-12-05 22:08:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:22,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:22,526 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-05 22:08:22,526 INFO L350 Elim1Store]: Elim1 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 226 treesize of output 196 [2022-12-05 22:08:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:22,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267844218] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:22,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:22,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 21 [2022-12-05 22:08:22,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691893083] [2022-12-05 22:08:22,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:22,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 22:08:22,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 22:08:22,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-12-05 22:08:22,874 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:22,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 388 flow. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:22,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:22,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:22,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:23,341 INFO L130 PetriNetUnfolder]: 441/846 cut-off events. [2022-12-05 22:08:23,341 INFO L131 PetriNetUnfolder]: For 1272/1272 co-relation queries the response was YES. [2022-12-05 22:08:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 846 events. 441/846 cut-off events. For 1272/1272 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4230 event pairs, 20 based on Foata normal form. 2/848 useless extension candidates. Maximal degree in co-relation 1951. Up to 541 conditions per place. [2022-12-05 22:08:23,344 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 63 selfloop transitions, 35 changer transitions 63/161 dead transitions. [2022-12-05 22:08:23,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 161 transitions, 1216 flow [2022-12-05 22:08:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 22:08:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 22:08:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 144 transitions. [2022-12-05 22:08:23,345 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-12-05 22:08:23,345 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 388 flow. Second operand 21 states and 144 transitions. [2022-12-05 22:08:23,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 161 transitions, 1216 flow [2022-12-05 22:08:23,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 161 transitions, 1130 flow, removed 23 selfloop flow, removed 11 redundant places. [2022-12-05 22:08:23,351 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 515 flow [2022-12-05 22:08:23,352 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=515, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2022-12-05 22:08:23,353 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 53 predicate places. [2022-12-05 22:08:23,353 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 515 flow [2022-12-05 22:08:23,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:23,353 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:23,353 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:23,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:23,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash 949882828, now seen corresponding path program 6 times [2022-12-05 22:08:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389283787] [2022-12-05 22:08:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389283787] [2022-12-05 22:08:24,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389283787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237396558] [2022-12-05 22:08:24,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:08:24,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:24,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:24,268 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) [2022-12-05 22:08:24,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 22:08:24,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 22:08:24,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 22:08:24,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:24,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:24,487 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 14 [2022-12-05 22:08:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:24,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:24,698 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-05 22:08:24,699 INFO L350 Elim1Store]: Elim1 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 226 treesize of output 196 [2022-12-05 22:08:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:24,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237396558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:24,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:24,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 20 [2022-12-05 22:08:24,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279636888] [2022-12-05 22:08:24,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:24,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 22:08:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 22:08:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-12-05 22:08:24,945 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:24,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 515 flow. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:24,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:24,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:24,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:25,683 INFO L130 PetriNetUnfolder]: 669/1268 cut-off events. [2022-12-05 22:08:25,683 INFO L131 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-12-05 22:08:25,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4889 conditions, 1268 events. 669/1268 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6975 event pairs, 44 based on Foata normal form. 8/1275 useless extension candidates. Maximal degree in co-relation 4566. Up to 841 conditions per place. [2022-12-05 22:08:25,687 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 62 selfloop transitions, 48 changer transitions 68/178 dead transitions. [2022-12-05 22:08:25,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 178 transitions, 1451 flow [2022-12-05 22:08:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 22:08:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 22:08:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 143 transitions. [2022-12-05 22:08:25,689 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2022-12-05 22:08:25,689 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 515 flow. Second operand 21 states and 143 transitions. [2022-12-05 22:08:25,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 178 transitions, 1451 flow [2022-12-05 22:08:25,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 178 transitions, 1336 flow, removed 24 selfloop flow, removed 9 redundant places. [2022-12-05 22:08:25,695 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 734 flow [2022-12-05 22:08:25,695 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=734, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2022-12-05 22:08:25,695 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2022-12-05 22:08:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 734 flow [2022-12-05 22:08:25,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:25,696 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:25,696 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:25,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:25,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:25,901 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 150248669, now seen corresponding path program 7 times [2022-12-05 22:08:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902700484] [2022-12-05 22:08:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902700484] [2022-12-05 22:08:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902700484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423766669] [2022-12-05 22:08:26,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:08:26,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:26,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:26,054 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) [2022-12-05 22:08:26,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 22:08:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 22:08:26,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:26,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:26,192 INFO L350 Elim1Store]: Elim1 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 170 treesize of output 120 [2022-12-05 22:08:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:26,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:26,380 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-05 22:08:26,380 INFO L350 Elim1Store]: Elim1 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 193 treesize of output 145 [2022-12-05 22:08:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:26,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423766669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:26,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:26,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2022-12-05 22:08:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086957694] [2022-12-05 22:08:26,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:26,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 22:08:26,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 22:08:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-05 22:08:26,430 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:26,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 734 flow. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:26,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:26,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:26,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:26,881 INFO L130 PetriNetUnfolder]: 1385/2617 cut-off events. [2022-12-05 22:08:26,881 INFO L131 PetriNetUnfolder]: For 6813/6813 co-relation queries the response was YES. [2022-12-05 22:08:26,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10802 conditions, 2617 events. 1385/2617 cut-off events. For 6813/6813 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16649 event pairs, 214 based on Foata normal form. 40/2656 useless extension candidates. Maximal degree in co-relation 10234. Up to 1801 conditions per place. [2022-12-05 22:08:26,890 INFO L137 encePairwiseOnDemand]: 11/16 looper letters, 103 selfloop transitions, 79 changer transitions 25/207 dead transitions. [2022-12-05 22:08:26,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 207 transitions, 2149 flow [2022-12-05 22:08:26,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 22:08:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 22:08:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 126 transitions. [2022-12-05 22:08:26,891 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4632352941176471 [2022-12-05 22:08:26,891 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 734 flow. Second operand 17 states and 126 transitions. [2022-12-05 22:08:26,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 207 transitions, 2149 flow [2022-12-05 22:08:26,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 207 transitions, 1987 flow, removed 58 selfloop flow, removed 11 redundant places. [2022-12-05 22:08:26,909 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 1501 flow [2022-12-05 22:08:26,910 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1501, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2022-12-05 22:08:26,910 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2022-12-05 22:08:26,910 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 1501 flow [2022-12-05 22:08:26,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:26,911 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:26,911 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:26,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-05 22:08:27,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:27,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:27,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash -948476652, now seen corresponding path program 8 times [2022-12-05 22:08:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:27,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696735436] [2022-12-05 22:08:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:27,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:27,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:27,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696735436] [2022-12-05 22:08:27,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696735436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:27,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376602369] [2022-12-05 22:08:27,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:08:27,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:27,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:27,268 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) [2022-12-05 22:08:27,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 22:08:27,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:08:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 22:08:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:27,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:27,491 INFO L350 Elim1Store]: Elim1 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 176 treesize of output 126 [2022-12-05 22:08:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:27,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:27,640 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-05 22:08:27,640 INFO L350 Elim1Store]: Elim1 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 201 treesize of output 153 [2022-12-05 22:08:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:27,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376602369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:27,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:27,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-12-05 22:08:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631890831] [2022-12-05 22:08:27,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:27,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 22:08:27,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 22:08:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-12-05 22:08:27,708 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:27,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 1501 flow. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:27,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:27,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:27,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:28,065 INFO L130 PetriNetUnfolder]: 1079/2060 cut-off events. [2022-12-05 22:08:28,066 INFO L131 PetriNetUnfolder]: For 6051/6051 co-relation queries the response was YES. [2022-12-05 22:08:28,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9121 conditions, 2060 events. 1079/2060 cut-off events. For 6051/6051 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12600 event pairs, 742 based on Foata normal form. 30/2089 useless extension candidates. Maximal degree in co-relation 8660. Up to 1852 conditions per place. [2022-12-05 22:08:28,080 INFO L137 encePairwiseOnDemand]: 11/16 looper letters, 90 selfloop transitions, 4 changer transitions 34/128 dead transitions. [2022-12-05 22:08:28,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 128 transitions, 1550 flow [2022-12-05 22:08:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 22:08:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 22:08:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 51 transitions. [2022-12-05 22:08:28,096 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2022-12-05 22:08:28,097 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 1501 flow. Second operand 9 states and 51 transitions. [2022-12-05 22:08:28,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 128 transitions, 1550 flow [2022-12-05 22:08:28,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1435 flow, removed 34 selfloop flow, removed 11 redundant places. [2022-12-05 22:08:28,111 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 1018 flow [2022-12-05 22:08:28,112 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1018, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2022-12-05 22:08:28,119 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 74 predicate places. [2022-12-05 22:08:28,119 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 1018 flow [2022-12-05 22:08:28,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:28,119 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:28,119 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:28,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-05 22:08:28,324 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash 384919405, now seen corresponding path program 9 times [2022-12-05 22:08:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572757239] [2022-12-05 22:08:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:29,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572757239] [2022-12-05 22:08:29,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572757239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664788372] [2022-12-05 22:08:29,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:08:29,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:29,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:29,724 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) [2022-12-05 22:08:29,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 22:08:29,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 22:08:29,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-05 22:08:29,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:30,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:30,177 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 18 [2022-12-05 22:08:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:30,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:30,612 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-12-05 22:08:30,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 274 treesize of output 276 [2022-12-05 22:08:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 22:08:31,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664788372] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:31,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:31,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 30 [2022-12-05 22:08:31,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444666852] [2022-12-05 22:08:31,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:31,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-05 22:08:31,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-05 22:08:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-12-05 22:08:31,714 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:31,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 1018 flow. Second operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:31,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:31,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:31,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:34,519 INFO L130 PetriNetUnfolder]: 1594/3007 cut-off events. [2022-12-05 22:08:34,519 INFO L131 PetriNetUnfolder]: For 8996/8996 co-relation queries the response was YES. [2022-12-05 22:08:34,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12583 conditions, 3007 events. 1594/3007 cut-off events. For 8996/8996 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19355 event pairs, 171 based on Foata normal form. 78/3084 useless extension candidates. Maximal degree in co-relation 12539. Up to 2059 conditions per place. [2022-12-05 22:08:34,529 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 109 selfloop transitions, 106 changer transitions 133/348 dead transitions. [2022-12-05 22:08:34,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 348 transitions, 3257 flow [2022-12-05 22:08:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-05 22:08:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-05 22:08:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 272 transitions. [2022-12-05 22:08:34,531 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2022-12-05 22:08:34,531 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 1018 flow. Second operand 36 states and 272 transitions. [2022-12-05 22:08:34,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 348 transitions, 3257 flow [2022-12-05 22:08:34,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 348 transitions, 3220 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-12-05 22:08:34,547 INFO L231 Difference]: Finished difference. Result has 133 places, 140 transitions, 2042 flow [2022-12-05 22:08:34,547 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2042, PETRI_PLACES=133, PETRI_TRANSITIONS=140} [2022-12-05 22:08:34,548 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2022-12-05 22:08:34,548 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 140 transitions, 2042 flow [2022-12-05 22:08:34,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:34,548 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:34,548 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:34,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-05 22:08:34,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:34,752 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:34,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1490719559, now seen corresponding path program 10 times [2022-12-05 22:08:34,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:34,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705945699] [2022-12-05 22:08:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:34,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:35,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705945699] [2022-12-05 22:08:35,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705945699] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:35,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407573621] [2022-12-05 22:08:35,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:08:35,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:35,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:35,802 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) [2022-12-05 22:08:35,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 22:08:35,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:08:35,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-05 22:08:35,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:36,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:36,103 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 18 [2022-12-05 22:08:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:36,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:36,487 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-12-05 22:08:36,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 274 treesize of output 276 [2022-12-05 22:08:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 22:08:37,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407573621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:37,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:37,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 29 [2022-12-05 22:08:37,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462367873] [2022-12-05 22:08:37,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:37,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 22:08:37,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:37,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 22:08:37,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-12-05 22:08:37,264 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:37,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 140 transitions, 2042 flow. Second operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:37,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:37,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:37,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:38,746 INFO L130 PetriNetUnfolder]: 1732/3249 cut-off events. [2022-12-05 22:08:38,746 INFO L131 PetriNetUnfolder]: For 24546/24546 co-relation queries the response was YES. [2022-12-05 22:08:38,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16554 conditions, 3249 events. 1732/3249 cut-off events. For 24546/24546 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21317 event pairs, 421 based on Foata normal form. 3/3251 useless extension candidates. Maximal degree in co-relation 15871. Up to 2225 conditions per place. [2022-12-05 22:08:38,766 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 133 selfloop transitions, 70 changer transitions 95/298 dead transitions. [2022-12-05 22:08:38,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 298 transitions, 3574 flow [2022-12-05 22:08:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 22:08:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 22:08:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 189 transitions. [2022-12-05 22:08:38,768 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.421875 [2022-12-05 22:08:38,769 INFO L175 Difference]: Start difference. First operand has 133 places, 140 transitions, 2042 flow. Second operand 28 states and 189 transitions. [2022-12-05 22:08:38,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 298 transitions, 3574 flow [2022-12-05 22:08:38,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 298 transitions, 3284 flow, removed 135 selfloop flow, removed 11 redundant places. [2022-12-05 22:08:38,886 INFO L231 Difference]: Finished difference. Result has 151 places, 153 transitions, 2191 flow [2022-12-05 22:08:38,887 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2191, PETRI_PLACES=151, PETRI_TRANSITIONS=153} [2022-12-05 22:08:38,887 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2022-12-05 22:08:38,887 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 153 transitions, 2191 flow [2022-12-05 22:08:38,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:38,887 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:38,887 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:38,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:39,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-05 22:08:39,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:39,092 INFO L85 PathProgramCache]: Analyzing trace with hash 965720992, now seen corresponding path program 11 times [2022-12-05 22:08:39,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:39,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007947036] [2022-12-05 22:08:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:39,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:39,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:39,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007947036] [2022-12-05 22:08:39,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007947036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:39,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208284367] [2022-12-05 22:08:39,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:08:39,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:39,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:39,312 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) [2022-12-05 22:08:39,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 22:08:39,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 22:08:39,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-05 22:08:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 22:08:39,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 22:08:39,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208284367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:39,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:39,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-12-05 22:08:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626968041] [2022-12-05 22:08:39,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 22:08:39,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 22:08:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-12-05 22:08:39,634 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 16 [2022-12-05 22:08:39,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 153 transitions, 2191 flow. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:39,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:39,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 16 [2022-12-05 22:08:39,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:40,498 INFO L130 PetriNetUnfolder]: 2224/4235 cut-off events. [2022-12-05 22:08:40,498 INFO L131 PetriNetUnfolder]: For 27794/27798 co-relation queries the response was YES. [2022-12-05 22:08:40,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21103 conditions, 4235 events. 2224/4235 cut-off events. For 27794/27798 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30146 event pairs, 767 based on Foata normal form. 100/4330 useless extension candidates. Maximal degree in co-relation 20419. Up to 2999 conditions per place. [2022-12-05 22:08:40,515 INFO L137 encePairwiseOnDemand]: 11/16 looper letters, 128 selfloop transitions, 7 changer transitions 94/231 dead transitions. [2022-12-05 22:08:40,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 231 transitions, 3360 flow [2022-12-05 22:08:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 22:08:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 22:08:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 90 transitions. [2022-12-05 22:08:40,516 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2022-12-05 22:08:40,516 INFO L175 Difference]: Start difference. First operand has 151 places, 153 transitions, 2191 flow. Second operand 13 states and 90 transitions. [2022-12-05 22:08:40,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 231 transitions, 3360 flow [2022-12-05 22:08:40,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 231 transitions, 3159 flow, removed 21 selfloop flow, removed 18 redundant places. [2022-12-05 22:08:40,641 INFO L231 Difference]: Finished difference. Result has 148 places, 136 transitions, 1908 flow [2022-12-05 22:08:40,641 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=2001, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1908, PETRI_PLACES=148, PETRI_TRANSITIONS=136} [2022-12-05 22:08:40,642 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2022-12-05 22:08:40,642 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 136 transitions, 1908 flow [2022-12-05 22:08:40,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:40,642 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:40,642 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:40,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:40,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-05 22:08:40,849 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1790500605, now seen corresponding path program 12 times [2022-12-05 22:08:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:40,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523512729] [2022-12-05 22:08:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-05 22:08:40,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:40,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523512729] [2022-12-05 22:08:40,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523512729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:40,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795181450] [2022-12-05 22:08:40,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:08:40,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:40,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:40,992 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) [2022-12-05 22:08:41,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 22:08:41,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 22:08:41,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 22:08:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:41,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:41,324 INFO L350 Elim1Store]: Elim1 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 196 treesize of output 128 [2022-12-05 22:08:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-05 22:08:41,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:41,556 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-12-05 22:08:41,557 INFO L350 Elim1Store]: Elim1 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 225 treesize of output 159 [2022-12-05 22:08:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-05 22:08:41,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795181450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:41,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:41,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 15 [2022-12-05 22:08:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091060587] [2022-12-05 22:08:41,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:41,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 22:08:41,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 22:08:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-12-05 22:08:41,611 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:41,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 136 transitions, 1908 flow. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:41,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:41,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:41,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:42,404 INFO L130 PetriNetUnfolder]: 2787/5146 cut-off events. [2022-12-05 22:08:42,404 INFO L131 PetriNetUnfolder]: For 47154/47154 co-relation queries the response was YES. [2022-12-05 22:08:42,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28203 conditions, 5146 events. 2787/5146 cut-off events. For 47154/47154 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36909 event pairs, 364 based on Foata normal form. 20/5165 useless extension candidates. Maximal degree in co-relation 27323. Up to 3561 conditions per place. [2022-12-05 22:08:42,433 INFO L137 encePairwiseOnDemand]: 13/16 looper letters, 127 selfloop transitions, 158 changer transitions 0/285 dead transitions. [2022-12-05 22:08:42,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 285 transitions, 4614 flow [2022-12-05 22:08:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 22:08:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 22:08:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2022-12-05 22:08:42,434 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2022-12-05 22:08:42,434 INFO L175 Difference]: Start difference. First operand has 148 places, 136 transitions, 1908 flow. Second operand 11 states and 97 transitions. [2022-12-05 22:08:42,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 285 transitions, 4614 flow [2022-12-05 22:08:42,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 285 transitions, 4330 flow, removed 126 selfloop flow, removed 16 redundant places. [2022-12-05 22:08:42,540 INFO L231 Difference]: Finished difference. Result has 128 places, 222 transitions, 3605 flow [2022-12-05 22:08:42,540 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3605, PETRI_PLACES=128, PETRI_TRANSITIONS=222} [2022-12-05 22:08:42,540 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 108 predicate places. [2022-12-05 22:08:42,540 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 222 transitions, 3605 flow [2022-12-05 22:08:42,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:42,541 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:42,541 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:42,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:42,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 22:08:42,746 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash 308934916, now seen corresponding path program 13 times [2022-12-05 22:08:42,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:42,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773531829] [2022-12-05 22:08:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:42,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:44,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773531829] [2022-12-05 22:08:44,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773531829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612131655] [2022-12-05 22:08:44,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:08:44,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:44,468 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) [2022-12-05 22:08:44,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 22:08:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:44,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-05 22:08:44,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:45,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:45,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 24 [2022-12-05 22:08:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:45,812 INFO L321 Elim1Store]: treesize reduction 40, result has 84.4 percent of original size [2022-12-05 22:08:45,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 346 treesize of output 408 [2022-12-05 22:08:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:49,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612131655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:49,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:49,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2022-12-05 22:08:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015069510] [2022-12-05 22:08:49,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:49,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-05 22:08:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-05 22:08:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2022-12-05 22:08:49,059 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:08:49,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 222 transitions, 3605 flow. Second operand has 46 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 45 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:49,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:49,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:08:49,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:55,238 INFO L130 PetriNetUnfolder]: 5303/10350 cut-off events. [2022-12-05 22:08:55,239 INFO L131 PetriNetUnfolder]: For 87501/87501 co-relation queries the response was YES. [2022-12-05 22:08:55,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52266 conditions, 10350 events. 5303/10350 cut-off events. For 87501/87501 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 89582 event pairs, 1308 based on Foata normal form. 586/10935 useless extension candidates. Maximal degree in co-relation 46622. Up to 7057 conditions per place. [2022-12-05 22:08:55,296 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 324 selfloop transitions, 212 changer transitions 227/763 dead transitions. [2022-12-05 22:08:55,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 763 transitions, 10903 flow [2022-12-05 22:08:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-05 22:08:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-05 22:08:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 416 transitions. [2022-12-05 22:08:55,298 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2022-12-05 22:08:55,298 INFO L175 Difference]: Start difference. First operand has 128 places, 222 transitions, 3605 flow. Second operand 55 states and 416 transitions. [2022-12-05 22:08:55,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 763 transitions, 10903 flow [2022-12-05 22:08:55,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 763 transitions, 10081 flow, removed 409 selfloop flow, removed 1 redundant places. [2022-12-05 22:08:55,514 INFO L231 Difference]: Finished difference. Result has 214 places, 406 transitions, 7374 flow [2022-12-05 22:08:55,514 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=7374, PETRI_PLACES=214, PETRI_TRANSITIONS=406} [2022-12-05 22:08:55,515 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 194 predicate places. [2022-12-05 22:08:55,516 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 406 transitions, 7374 flow [2022-12-05 22:08:55,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 45 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:55,516 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:55,516 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:55,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:55,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-05 22:08:55,722 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:55,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1237431636, now seen corresponding path program 14 times [2022-12-05 22:08:55,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:55,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619097885] [2022-12-05 22:08:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:55,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:57,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:57,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619097885] [2022-12-05 22:08:57,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619097885] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:57,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200387822] [2022-12-05 22:08:57,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:08:57,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:57,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:57,701 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:08:57,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 22:08:57,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:08:57,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:57,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-05 22:08:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:57,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-05 22:08:57,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:08:58,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:08:58,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:58,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 24 [2022-12-05 22:08:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:58,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:59,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:59,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:08:59,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:59,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 499 treesize of output 645 [2022-12-05 22:08:59,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:59,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 537 [2022-12-05 22:08:59,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:08:59,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 483 [2022-12-05 22:09:24,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:09:24,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:09:24,913 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:09:24,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 499 treesize of output 445 [2022-12-05 22:09:24,951 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:09:24,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 337 [2022-12-05 22:09:24,988 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:09:24,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 283 [2022-12-05 22:09:25,103 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-05 22:09:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:09:25,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200387822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:09:25,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:09:25,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2022-12-05 22:09:25,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559924471] [2022-12-05 22:09:25,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:09:25,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-05 22:09:25,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:09:25,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-05 22:09:25,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1908, Unknown=5, NotChecked=0, Total=2352 [2022-12-05 22:09:25,358 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:09:25,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 406 transitions, 7374 flow. Second operand has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:09:25,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:09:25,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:09:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:09:33,152 INFO L130 PetriNetUnfolder]: 5600/10805 cut-off events. [2022-12-05 22:09:33,152 INFO L131 PetriNetUnfolder]: For 132150/132150 co-relation queries the response was YES. [2022-12-05 22:09:33,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60559 conditions, 10805 events. 5600/10805 cut-off events. For 132150/132150 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 92233 event pairs, 2312 based on Foata normal form. 45/10849 useless extension candidates. Maximal degree in co-relation 59693. Up to 7863 conditions per place. [2022-12-05 22:09:33,217 INFO L137 encePairwiseOnDemand]: 8/16 looper letters, 423 selfloop transitions, 128 changer transitions 199/750 dead transitions. [2022-12-05 22:09:33,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 750 transitions, 11647 flow [2022-12-05 22:09:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-05 22:09:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-05 22:09:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 342 transitions. [2022-12-05 22:09:33,219 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4033018867924528 [2022-12-05 22:09:33,219 INFO L175 Difference]: Start difference. First operand has 214 places, 406 transitions, 7374 flow. Second operand 53 states and 342 transitions. [2022-12-05 22:09:33,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 750 transitions, 11647 flow [2022-12-05 22:09:33,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 750 transitions, 10946 flow, removed 312 selfloop flow, removed 17 redundant places. [2022-12-05 22:09:33,980 INFO L231 Difference]: Finished difference. Result has 254 places, 458 transitions, 8101 flow [2022-12-05 22:09:33,980 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=6702, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=8101, PETRI_PLACES=254, PETRI_TRANSITIONS=458} [2022-12-05 22:09:33,981 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 234 predicate places. [2022-12-05 22:09:33,981 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 458 transitions, 8101 flow [2022-12-05 22:09:33,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:09:33,981 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:09:33,981 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:09:33,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-05 22:09:34,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:34,183 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:09:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:09:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash -74757612, now seen corresponding path program 15 times [2022-12-05 22:09:34,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:09:34,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911305137] [2022-12-05 22:09:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:09:34,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:09:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:09:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:09:36,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:09:36,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911305137] [2022-12-05 22:09:36,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911305137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:09:36,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363956279] [2022-12-05 22:09:36,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:09:36,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:09:36,047 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:09:36,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 22:09:36,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-05 22:09:36,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:09:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-05 22:09:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:09:36,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-05 22:09:36,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:09:36,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:09:37,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:09:37,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 24 [2022-12-05 22:09:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:09:37,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:09:38,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:09:38,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:09:38,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:09:38,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 499 treesize of output 645 [2022-12-05 22:09:38,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:09:38,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 537 [2022-12-05 22:09:38,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:09:38,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 483 [2022-12-05 22:10:09,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:09,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:10:09,282 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:10:09,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 499 treesize of output 445 [2022-12-05 22:10:09,323 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:10:09,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 337 [2022-12-05 22:10:09,359 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:10:09,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 283 [2022-12-05 22:10:09,479 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-05 22:10:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:10:09,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363956279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:10:09,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:10:09,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2022-12-05 22:10:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115450971] [2022-12-05 22:10:09,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:10:09,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-05 22:10:09,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:10:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-05 22:10:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1932, Unknown=6, NotChecked=0, Total=2352 [2022-12-05 22:10:09,727 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:10:09,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 458 transitions, 8101 flow. Second operand has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:10:09,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:10:09,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:10:09,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:10:22,804 INFO L130 PetriNetUnfolder]: 8780/17169 cut-off events. [2022-12-05 22:10:22,804 INFO L131 PetriNetUnfolder]: For 251067/251067 co-relation queries the response was YES. [2022-12-05 22:10:22,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95047 conditions, 17169 events. 8780/17169 cut-off events. For 251067/251067 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 150124 event pairs, 2422 based on Foata normal form. 325/17494 useless extension candidates. Maximal degree in co-relation 94337. Up to 11725 conditions per place. [2022-12-05 22:10:22,914 INFO L137 encePairwiseOnDemand]: 8/16 looper letters, 640 selfloop transitions, 399 changer transitions 269/1308 dead transitions. [2022-12-05 22:10:22,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1308 transitions, 20825 flow [2022-12-05 22:10:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-05 22:10:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-12-05 22:10:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 683 transitions. [2022-12-05 22:10:22,923 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4690934065934066 [2022-12-05 22:10:22,923 INFO L175 Difference]: Start difference. First operand has 254 places, 458 transitions, 8101 flow. Second operand 91 states and 683 transitions. [2022-12-05 22:10:22,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1308 transitions, 20825 flow [2022-12-05 22:10:24,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1308 transitions, 20265 flow, removed 255 selfloop flow, removed 26 redundant places. [2022-12-05 22:10:24,276 INFO L231 Difference]: Finished difference. Result has 349 places, 751 transitions, 15058 flow [2022-12-05 22:10:24,276 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=15058, PETRI_PLACES=349, PETRI_TRANSITIONS=751} [2022-12-05 22:10:24,276 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 329 predicate places. [2022-12-05 22:10:24,277 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 751 transitions, 15058 flow [2022-12-05 22:10:24,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:10:24,277 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:10:24,277 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:10:24,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-05 22:10:24,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-05 22:10:24,482 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:10:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:10:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2100142676, now seen corresponding path program 16 times [2022-12-05 22:10:24,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:10:24,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452427798] [2022-12-05 22:10:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:10:24,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:10:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:10:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:10:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:10:26,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452427798] [2022-12-05 22:10:26,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452427798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:10:26,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081198639] [2022-12-05 22:10:26,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:10:26,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:10:26,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:10:26,141 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:10:26,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 22:10:26,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:10:26,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:10:26,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-05 22:10:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:10:26,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-05 22:10:26,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:10:26,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:10:26,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:26,874 INFO L350 Elim1Store]: Elim1 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 94 treesize of output 24 [2022-12-05 22:10:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:10:26,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:10:28,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:28,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:10:28,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:28,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 499 treesize of output 645 [2022-12-05 22:10:28,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:28,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 537 [2022-12-05 22:10:28,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:28,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 483 [2022-12-05 22:10:44,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:44,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:10:44,739 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:10:44,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1047 treesize of output 923 [2022-12-05 22:10:44,786 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:10:44,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 907 treesize of output 815 [2022-12-05 22:10:44,831 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:10:44,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 799 treesize of output 599 [2022-12-05 22:10:44,970 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-05 22:10:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:10:45,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081198639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:10:45,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:10:45,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2022-12-05 22:10:45,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429440269] [2022-12-05 22:10:45,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:10:45,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-05 22:10:45,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:10:45,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-05 22:10:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1949, Unknown=3, NotChecked=0, Total=2352 [2022-12-05 22:10:45,215 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:10:45,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 751 transitions, 15058 flow. Second operand has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:10:45,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:10:45,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:10:45,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:10:53,387 INFO L130 PetriNetUnfolder]: 6188/11618 cut-off events. [2022-12-05 22:10:53,387 INFO L131 PetriNetUnfolder]: For 197831/197831 co-relation queries the response was YES. [2022-12-05 22:10:53,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70321 conditions, 11618 events. 6188/11618 cut-off events. For 197831/197831 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 95944 event pairs, 2212 based on Foata normal form. 56/11674 useless extension candidates. Maximal degree in co-relation 70198. Up to 8145 conditions per place. [2022-12-05 22:10:53,465 INFO L137 encePairwiseOnDemand]: 8/16 looper letters, 418 selfloop transitions, 151 changer transitions 186/755 dead transitions. [2022-12-05 22:10:53,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 755 transitions, 12481 flow [2022-12-05 22:10:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-05 22:10:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-05 22:10:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 321 transitions. [2022-12-05 22:10:53,476 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40125 [2022-12-05 22:10:53,476 INFO L175 Difference]: Start difference. First operand has 349 places, 751 transitions, 15058 flow. Second operand 50 states and 321 transitions. [2022-12-05 22:10:53,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 755 transitions, 12481 flow [2022-12-05 22:10:54,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 755 transitions, 11809 flow, removed 284 selfloop flow, removed 56 redundant places. [2022-12-05 22:10:54,683 INFO L231 Difference]: Finished difference. Result has 311 places, 493 transitions, 9167 flow [2022-12-05 22:10:54,684 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=7941, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=9167, PETRI_PLACES=311, PETRI_TRANSITIONS=493} [2022-12-05 22:10:54,684 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 291 predicate places. [2022-12-05 22:10:54,684 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 493 transitions, 9167 flow [2022-12-05 22:10:54,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:10:54,684 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:10:54,684 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:10:54,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-05 22:10:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:10:54,889 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:10:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:10:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -602002908, now seen corresponding path program 17 times [2022-12-05 22:10:54,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:10:54,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085315273] [2022-12-05 22:10:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:10:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:10:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:10:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:10:56,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:10:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085315273] [2022-12-05 22:10:56,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085315273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:10:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913805514] [2022-12-05 22:10:56,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:10:56,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:10:56,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:10:56,788 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:10:56,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 22:10:56,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 22:10:56,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:10:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-05 22:10:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:10:57,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-05 22:10:57,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:10:57,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:10:57,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:57,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 24 [2022-12-05 22:10:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:10:57,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:10:58,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:58,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:10:58,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:58,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1047 treesize of output 1123 [2022-12-05 22:10:58,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:58,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 907 treesize of output 1015 [2022-12-05 22:10:59,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:10:59,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 799 treesize of output 799 [2022-12-05 22:11:15,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:11:15,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:11:15,881 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:11:15,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 499 treesize of output 445 [2022-12-05 22:11:15,922 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:11:15,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 337 [2022-12-05 22:11:15,960 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:11:15,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 283 [2022-12-05 22:11:16,151 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-05 22:11:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:11:16,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913805514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:11:16,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:11:16,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2022-12-05 22:11:16,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486409215] [2022-12-05 22:11:16,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:11:16,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-05 22:11:16,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:11:16,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-05 22:11:16,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1958, Unknown=3, NotChecked=0, Total=2352 [2022-12-05 22:11:16,398 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:11:16,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 493 transitions, 9167 flow. Second operand has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:11:16,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:11:16,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:11:16,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:11:28,938 INFO L130 PetriNetUnfolder]: 6830/12740 cut-off events. [2022-12-05 22:11:28,938 INFO L131 PetriNetUnfolder]: For 182168/182168 co-relation queries the response was YES. [2022-12-05 22:11:29,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77772 conditions, 12740 events. 6830/12740 cut-off events. For 182168/182168 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 107279 event pairs, 2714 based on Foata normal form. 8/12748 useless extension candidates. Maximal degree in co-relation 77665. Up to 9117 conditions per place. [2022-12-05 22:11:29,037 INFO L137 encePairwiseOnDemand]: 8/16 looper letters, 442 selfloop transitions, 165 changer transitions 160/767 dead transitions. [2022-12-05 22:11:29,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 767 transitions, 13150 flow [2022-12-05 22:11:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-05 22:11:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-05 22:11:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 275 transitions. [2022-12-05 22:11:29,039 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3736413043478261 [2022-12-05 22:11:29,039 INFO L175 Difference]: Start difference. First operand has 311 places, 493 transitions, 9167 flow. Second operand 46 states and 275 transitions. [2022-12-05 22:11:29,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 767 transitions, 13150 flow [2022-12-05 22:11:30,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 767 transitions, 12747 flow, removed 146 selfloop flow, removed 38 redundant places. [2022-12-05 22:11:30,421 INFO L231 Difference]: Finished difference. Result has 303 places, 537 transitions, 10302 flow [2022-12-05 22:11:30,422 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=8798, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=10302, PETRI_PLACES=303, PETRI_TRANSITIONS=537} [2022-12-05 22:11:30,422 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 283 predicate places. [2022-12-05 22:11:30,422 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 537 transitions, 10302 flow [2022-12-05 22:11:30,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:11:30,422 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:11:30,423 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:11:30,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-05 22:11:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:11:30,627 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:11:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:11:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash -806000452, now seen corresponding path program 18 times [2022-12-05 22:11:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:11:30,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123003140] [2022-12-05 22:11:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:11:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:11:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:11:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:11:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:11:31,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123003140] [2022-12-05 22:11:31,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123003140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:11:31,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004727341] [2022-12-05 22:11:31,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:11:31,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:11:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:11:31,963 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:11:31,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 22:11:32,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 22:11:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:11:32,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-05 22:11:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:11:32,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-05 22:11:32,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:11:32,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 22:11:32,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:11:32,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 24 [2022-12-05 22:11:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:11:32,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:11:33,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:11:33,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:11:33,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:11:33,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 499 treesize of output 645 [2022-12-05 22:11:33,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:11:33,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 537 [2022-12-05 22:11:34,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:11:34,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 483 [2022-12-05 22:12:13,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:12:13,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2022-12-05 22:12:13,834 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:12:13,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 499 treesize of output 445 [2022-12-05 22:12:13,878 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:12:13,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 337 [2022-12-05 22:12:13,922 INFO L321 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2022-12-05 22:12:13,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 283 [2022-12-05 22:12:14,081 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-05 22:12:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:12:14,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004727341] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:12:14,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:12:14,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2022-12-05 22:12:14,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022094882] [2022-12-05 22:12:14,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:12:14,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-05 22:12:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:12:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-05 22:12:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1956, Unknown=4, NotChecked=0, Total=2352 [2022-12-05 22:12:14,317 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:12:14,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 537 transitions, 10302 flow. Second operand has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:12:14,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:12:14,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:12:14,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:12:21,199 INFO L130 PetriNetUnfolder]: 7212/13408 cut-off events. [2022-12-05 22:12:21,199 INFO L131 PetriNetUnfolder]: For 203828/203828 co-relation queries the response was YES. [2022-12-05 22:12:21,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84343 conditions, 13408 events. 7212/13408 cut-off events. For 203828/203828 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 113681 event pairs, 3386 based on Foata normal form. 2/13410 useless extension candidates. Maximal degree in co-relation 84237. Up to 11706 conditions per place. [2022-12-05 22:12:21,302 INFO L137 encePairwiseOnDemand]: 8/16 looper letters, 544 selfloop transitions, 85 changer transitions 110/739 dead transitions. [2022-12-05 22:12:21,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 739 transitions, 13526 flow [2022-12-05 22:12:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-05 22:12:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-05 22:12:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 234 transitions. [2022-12-05 22:12:21,303 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.375 [2022-12-05 22:12:21,303 INFO L175 Difference]: Start difference. First operand has 303 places, 537 transitions, 10302 flow. Second operand 39 states and 234 transitions. [2022-12-05 22:12:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 739 transitions, 13526 flow [2022-12-05 22:12:22,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 739 transitions, 13151 flow, removed 94 selfloop flow, removed 38 redundant places. [2022-12-05 22:12:22,881 INFO L231 Difference]: Finished difference. Result has 294 places, 566 transitions, 10974 flow [2022-12-05 22:12:22,882 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=9967, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10974, PETRI_PLACES=294, PETRI_TRANSITIONS=566} [2022-12-05 22:12:22,882 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 274 predicate places. [2022-12-05 22:12:22,882 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 566 transitions, 10974 flow [2022-12-05 22:12:22,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:12:22,882 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:12:22,882 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:12:22,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-05 22:12:23,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:12:23,088 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:12:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:12:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1419963204, now seen corresponding path program 19 times [2022-12-05 22:12:23,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:12:23,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690233425] [2022-12-05 22:12:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:12:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:12:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:12:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:12:24,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:12:24,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690233425] [2022-12-05 22:12:24,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690233425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:12:24,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837867743] [2022-12-05 22:12:24,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:12:24,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:12:24,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:12:24,456 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:12:24,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 22:12:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:12:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-05 22:12:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:12:25,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:12:25,028 INFO L350 Elim1Store]: Elim1 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 94 treesize of output 24 [2022-12-05 22:12:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:12:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:12:25,769 INFO L321 Elim1Store]: treesize reduction 40, result has 84.4 percent of original size [2022-12-05 22:12:25,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 346 treesize of output 408 [2022-12-05 22:12:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:12:29,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837867743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:12:29,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:12:29,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2022-12-05 22:12:29,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207349729] [2022-12-05 22:12:29,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:12:29,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-05 22:12:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:12:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-05 22:12:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2022-12-05 22:12:29,080 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:12:29,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 566 transitions, 10974 flow. Second operand has 46 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:12:29,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:12:29,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:12:29,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:12:35,971 INFO L130 PetriNetUnfolder]: 8144/15190 cut-off events. [2022-12-05 22:12:35,971 INFO L131 PetriNetUnfolder]: For 241559/241559 co-relation queries the response was YES. [2022-12-05 22:12:36,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94091 conditions, 15190 events. 8144/15190 cut-off events. For 241559/241559 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 129701 event pairs, 2418 based on Foata normal form. 49/15239 useless extension candidates. Maximal degree in co-relation 93984. Up to 10473 conditions per place. [2022-12-05 22:12:36,089 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 465 selfloop transitions, 259 changer transitions 178/902 dead transitions. [2022-12-05 22:12:36,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 902 transitions, 15896 flow [2022-12-05 22:12:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-05 22:12:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-05 22:12:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 298 transitions. [2022-12-05 22:12:36,091 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2022-12-05 22:12:36,091 INFO L175 Difference]: Start difference. First operand has 294 places, 566 transitions, 10974 flow. Second operand 43 states and 298 transitions. [2022-12-05 22:12:36,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 902 transitions, 15896 flow [2022-12-05 22:12:37,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 902 transitions, 15764 flow, removed 13 selfloop flow, removed 32 redundant places. [2022-12-05 22:12:38,011 INFO L231 Difference]: Finished difference. Result has 312 places, 627 transitions, 12806 flow [2022-12-05 22:12:38,012 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=10803, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=12806, PETRI_PLACES=312, PETRI_TRANSITIONS=627} [2022-12-05 22:12:38,012 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2022-12-05 22:12:38,012 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 627 transitions, 12806 flow [2022-12-05 22:12:38,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:12:38,013 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:12:38,013 INFO L213 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:12:38,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-05 22:12:38,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:12:38,217 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:12:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:12:38,218 INFO L85 PathProgramCache]: Analyzing trace with hash 717176829, now seen corresponding path program 20 times [2022-12-05 22:12:38,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:12:38,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954502920] [2022-12-05 22:12:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:12:38,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:12:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:12:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 22:12:38,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:12:38,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954502920] [2022-12-05 22:12:38,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954502920] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:12:38,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553145846] [2022-12-05 22:12:38,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:12:38,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:12:38,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:12:38,406 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:12:38,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 22:12:38,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:12:38,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:12:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 22:12:38,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:12:38,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:12:38,842 INFO L350 Elim1Store]: Elim1 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 222 treesize of output 136 [2022-12-05 22:12:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-05 22:12:38,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:12:39,326 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-05 22:12:39,327 INFO L350 Elim1Store]: Elim1 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 253 treesize of output 169 [2022-12-05 22:12:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-05 22:12:39,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553145846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:12:39,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:12:39,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 29 [2022-12-05 22:12:39,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17243872] [2022-12-05 22:12:39,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:12:39,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-05 22:12:39,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:12:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-05 22:12:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2022-12-05 22:12:39,402 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:12:39,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 627 transitions, 12806 flow. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:12:39,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:12:39,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:12:39,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:12:46,111 INFO L130 PetriNetUnfolder]: 11656/21477 cut-off events. [2022-12-05 22:12:46,111 INFO L131 PetriNetUnfolder]: For 488012/488012 co-relation queries the response was YES. [2022-12-05 22:12:46,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152530 conditions, 21477 events. 11656/21477 cut-off events. For 488012/488012 co-relation queries the response was YES. Maximal size of possible extension queue 1361. Compared 190479 event pairs, 1622 based on Foata normal form. 52/21529 useless extension candidates. Maximal degree in co-relation 152415. Up to 14841 conditions per place. [2022-12-05 22:12:46,319 INFO L137 encePairwiseOnDemand]: 11/16 looper letters, 334 selfloop transitions, 657 changer transitions 79/1070 dead transitions. [2022-12-05 22:12:46,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1070 transitions, 23497 flow [2022-12-05 22:12:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 22:12:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 22:12:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 255 transitions. [2022-12-05 22:12:46,321 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2022-12-05 22:12:46,321 INFO L175 Difference]: Start difference. First operand has 312 places, 627 transitions, 12806 flow. Second operand 35 states and 255 transitions. [2022-12-05 22:12:46,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1070 transitions, 23497 flow [2022-12-05 22:12:48,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1070 transitions, 22907 flow, removed 216 selfloop flow, removed 32 redundant places. [2022-12-05 22:12:48,662 INFO L231 Difference]: Finished difference. Result has 300 places, 870 transitions, 20832 flow [2022-12-05 22:12:48,662 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=12155, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=20832, PETRI_PLACES=300, PETRI_TRANSITIONS=870} [2022-12-05 22:12:48,662 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 280 predicate places. [2022-12-05 22:12:48,663 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 870 transitions, 20832 flow [2022-12-05 22:12:48,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:12:48,663 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:12:48,663 INFO L213 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:12:48,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-05 22:12:48,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-05 22:12:48,867 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:12:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:12:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash 732921249, now seen corresponding path program 21 times [2022-12-05 22:12:48,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:12:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792873850] [2022-12-05 22:12:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:12:48,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:12:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:12:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:12:51,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:12:51,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792873850] [2022-12-05 22:12:51,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792873850] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:12:51,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142224343] [2022-12-05 22:12:51,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:12:51,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:12:51,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:12:51,050 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:12:51,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-05 22:12:51,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-05 22:12:51,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:12:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-05 22:12:51,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:12:51,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:12:51,846 INFO L350 Elim1Store]: Elim1 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 94 treesize of output 24 [2022-12-05 22:12:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:12:51,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:12:52,612 INFO L321 Elim1Store]: treesize reduction 40, result has 84.4 percent of original size [2022-12-05 22:12:52,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 322 treesize of output 384 [2022-12-05 22:12:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-05 22:12:57,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142224343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:12:57,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:12:57,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 9] total 39 [2022-12-05 22:12:57,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337169191] [2022-12-05 22:12:57,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:12:57,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-05 22:12:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:12:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-05 22:12:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-12-05 22:12:57,715 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:12:57,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 870 transitions, 20832 flow. Second operand has 41 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:12:57,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:12:57,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:12:57,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:13:12,596 INFO L130 PetriNetUnfolder]: 16564/30349 cut-off events. [2022-12-05 22:13:12,596 INFO L131 PetriNetUnfolder]: For 763226/763226 co-relation queries the response was YES. [2022-12-05 22:13:12,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234681 conditions, 30349 events. 16564/30349 cut-off events. For 763226/763226 co-relation queries the response was YES. Maximal size of possible extension queue 1739. Compared 281937 event pairs, 3995 based on Foata normal form. 107/30456 useless extension candidates. Maximal degree in co-relation 234570. Up to 20949 conditions per place. [2022-12-05 22:13:13,002 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 685 selfloop transitions, 856 changer transitions 305/1846 dead transitions. [2022-12-05 22:13:13,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1846 transitions, 42466 flow [2022-12-05 22:13:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-05 22:13:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-12-05 22:13:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 635 transitions. [2022-12-05 22:13:13,004 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.49609375 [2022-12-05 22:13:13,004 INFO L175 Difference]: Start difference. First operand has 300 places, 870 transitions, 20832 flow. Second operand 80 states and 635 transitions. [2022-12-05 22:13:13,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1846 transitions, 42466 flow [2022-12-05 22:13:20,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1846 transitions, 38276 flow, removed 2046 selfloop flow, removed 24 redundant places. [2022-12-05 22:13:20,566 INFO L231 Difference]: Finished difference. Result has 382 places, 1269 transitions, 32657 flow [2022-12-05 22:13:20,567 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=18893, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=32657, PETRI_PLACES=382, PETRI_TRANSITIONS=1269} [2022-12-05 22:13:20,568 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 362 predicate places. [2022-12-05 22:13:20,568 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1269 transitions, 32657 flow [2022-12-05 22:13:20,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:13:20,568 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:13:20,568 INFO L213 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:13:20,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-05 22:13:20,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-05 22:13:20,772 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:13:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:13:20,773 INFO L85 PathProgramCache]: Analyzing trace with hash -942928064, now seen corresponding path program 22 times [2022-12-05 22:13:20,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:13:20,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611363560] [2022-12-05 22:13:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:13:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:13:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:13:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:13:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:13:21,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611363560] [2022-12-05 22:13:21,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611363560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:13:21,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087043889] [2022-12-05 22:13:21,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:13:21,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:13:21,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:13:21,019 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:13:21,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-05 22:13:21,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:13:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:13:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 22:13:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:13:21,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:13:21,568 INFO L350 Elim1Store]: Elim1 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 228 treesize of output 142 [2022-12-05 22:13:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:13:21,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:13:22,022 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-05 22:13:22,022 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 173 [2022-12-05 22:13:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:13:22,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087043889] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:13:22,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:13:22,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2022-12-05 22:13:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617088127] [2022-12-05 22:13:22,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:13:22,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-05 22:13:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:13:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-05 22:13:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2022-12-05 22:13:22,167 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:13:22,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1269 transitions, 32657 flow. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:13:22,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:13:22,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:13:22,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:13:35,402 INFO L130 PetriNetUnfolder]: 16350/29890 cut-off events. [2022-12-05 22:13:35,402 INFO L131 PetriNetUnfolder]: For 814618/814618 co-relation queries the response was YES. [2022-12-05 22:13:35,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225161 conditions, 29890 events. 16350/29890 cut-off events. For 814618/814618 co-relation queries the response was YES. Maximal size of possible extension queue 1786. Compared 278732 event pairs, 11463 based on Foata normal form. 6/29896 useless extension candidates. Maximal degree in co-relation 225016. Up to 29655 conditions per place. [2022-12-05 22:13:35,767 INFO L137 encePairwiseOnDemand]: 11/16 looper letters, 1237 selfloop transitions, 6 changer transitions 55/1298 dead transitions. [2022-12-05 22:13:35,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1298 transitions, 35158 flow [2022-12-05 22:13:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 22:13:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 22:13:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 77 transitions. [2022-12-05 22:13:35,768 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.34375 [2022-12-05 22:13:35,768 INFO L175 Difference]: Start difference. First operand has 382 places, 1269 transitions, 32657 flow. Second operand 14 states and 77 transitions. [2022-12-05 22:13:35,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1298 transitions, 35158 flow [2022-12-05 22:13:47,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1298 transitions, 31588 flow, removed 1659 selfloop flow, removed 21 redundant places. [2022-12-05 22:13:47,998 INFO L231 Difference]: Finished difference. Result has 369 places, 1243 transitions, 28689 flow [2022-12-05 22:13:47,999 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=28840, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=28689, PETRI_PLACES=369, PETRI_TRANSITIONS=1243} [2022-12-05 22:13:48,000 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2022-12-05 22:13:48,000 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1243 transitions, 28689 flow [2022-12-05 22:13:48,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:13:48,000 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:13:48,000 INFO L213 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:13:48,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-05 22:13:48,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:13:48,205 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:13:48,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:13:48,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1394798963, now seen corresponding path program 23 times [2022-12-05 22:13:48,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:13:48,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061572651] [2022-12-05 22:13:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:13:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:13:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:13:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:13:49,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:13:49,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061572651] [2022-12-05 22:13:49,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061572651] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:13:49,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572328453] [2022-12-05 22:13:49,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:13:49,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:13:49,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:13:49,941 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:13:49,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-05 22:13:50,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-05 22:13:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:13:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-05 22:13:50,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:13:50,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:13:50,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 28 [2022-12-05 22:13:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:13:50,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:13:52,022 INFO L321 Elim1Store]: treesize reduction 54, result has 86.3 percent of original size [2022-12-05 22:13:52,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 394 treesize of output 544 [2022-12-05 22:14:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:14:04,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572328453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:14:04,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:14:04,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 54 [2022-12-05 22:14:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455775316] [2022-12-05 22:14:04,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:14:04,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-05 22:14:04,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:14:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-05 22:14:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=2613, Unknown=0, NotChecked=0, Total=3080 [2022-12-05 22:14:04,196 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:14:04,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1243 transitions, 28689 flow. Second operand has 56 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:14:04,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:14:04,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:14:04,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:28,342 INFO L130 PetriNetUnfolder]: 36385/66687 cut-off events. [2022-12-05 22:15:28,343 INFO L131 PetriNetUnfolder]: For 3093191/3093191 co-relation queries the response was YES. [2022-12-05 22:15:29,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535050 conditions, 66687 events. 36385/66687 cut-off events. For 3093191/3093191 co-relation queries the response was YES. Maximal size of possible extension queue 3656. Compared 687378 event pairs, 7388 based on Foata normal form. 593/67280 useless extension candidates. Maximal degree in co-relation 534908. Up to 45843 conditions per place. [2022-12-05 22:15:29,817 INFO L137 encePairwiseOnDemand]: 9/16 looper letters, 2381 selfloop transitions, 1930 changer transitions 1076/5387 dead transitions. [2022-12-05 22:15:29,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 5387 transitions, 122895 flow [2022-12-05 22:15:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2022-12-05 22:15:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2022-12-05 22:15:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 3096 transitions. [2022-12-05 22:15:29,822 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.53601108033241 [2022-12-05 22:15:29,822 INFO L175 Difference]: Start difference. First operand has 369 places, 1243 transitions, 28689 flow. Second operand 361 states and 3096 transitions. [2022-12-05 22:15:29,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 5387 transitions, 122895 flow [2022-12-05 22:15:51,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 5387 transitions, 121142 flow, removed 791 selfloop flow, removed 12 redundant places. [2022-12-05 22:15:52,058 INFO L231 Difference]: Finished difference. Result has 906 places, 3146 transitions, 97436 flow [2022-12-05 22:15:52,059 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=28219, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=361, PETRI_FLOW=97436, PETRI_PLACES=906, PETRI_TRANSITIONS=3146} [2022-12-05 22:15:52,059 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 886 predicate places. [2022-12-05 22:15:52,059 INFO L495 AbstractCegarLoop]: Abstraction has has 906 places, 3146 transitions, 97436 flow [2022-12-05 22:15:52,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:52,059 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:52,059 INFO L213 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:52,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-05 22:15:52,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:15:52,265 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash -983893799, now seen corresponding path program 24 times [2022-12-05 22:15:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:52,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027840368] [2022-12-05 22:15:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:53,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:53,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027840368] [2022-12-05 22:15:53,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027840368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:15:53,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321141229] [2022-12-05 22:15:53,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:15:53,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:15:53,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:15:53,973 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:15:53,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-05 22:15:54,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-05 22:15:54,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:15:54,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-05 22:15:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:15:54,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:15:54,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 28 [2022-12-05 22:15:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:54,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:15:56,068 INFO L321 Elim1Store]: treesize reduction 54, result has 86.3 percent of original size [2022-12-05 22:15:56,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 394 treesize of output 544 [2022-12-05 22:16:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:16:06,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321141229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:16:06,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:16:06,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 54 [2022-12-05 22:16:06,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087675304] [2022-12-05 22:16:06,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:16:06,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-05 22:16:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:16:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-05 22:16:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=2609, Unknown=0, NotChecked=0, Total=3080 [2022-12-05 22:16:06,613 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 16 [2022-12-05 22:16:06,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 906 places, 3146 transitions, 97436 flow. Second operand has 56 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:16:06,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:16:06,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 16 [2022-12-05 22:16:06,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand