/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 --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:11:38,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:11:38,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:11:38,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:11:38,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:11:38,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:11:38,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:11:38,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:11:38,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:11:38,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:11:38,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:11:38,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:11:38,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:11:38,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:11:38,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:11:38,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:11:38,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:11:38,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:11:38,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:11:38,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:11:38,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:11:38,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:11:38,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:11:38,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:11:38,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:11:38,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:11:38,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:11:38,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:11:38,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:11:38,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:11:38,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:11:38,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:11:38,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:11:38,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:11:38,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:11:38,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:11:38,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:11:38,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:11:38,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:11:38,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:11:38,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:11:38,170 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 [2022-12-12 23:11:38,191 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:11:38,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:11:38,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:11:38,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:11:38,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:11:38,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:11:38,194 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:11:38,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:11:38,194 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:11:38,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:11:38,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:11:38,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:11:38,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:11:38,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:11:38,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:11:38,195 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:11:38,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:11:38,196 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:11:38,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:11:38,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:11:38,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:11:38,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:11:38,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:11:38,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:11:38,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:11:38,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:11:38,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:11:38,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:11:38,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:11:38,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:11:38,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:11:38,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:11:38,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:11:38,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:11:38,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:11:38,475 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:11:38,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-12 23:11:39,504 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:11:39,677 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:11:39,677 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-12 23:11:39,683 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f389d70e9/dad2d2a9321743e9b5810fbd0a6c4922/FLAG4749e901e [2022-12-12 23:11:39,694 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f389d70e9/dad2d2a9321743e9b5810fbd0a6c4922 [2022-12-12 23:11:39,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:11:39,697 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:11:39,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:11:39,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:11:39,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:11:39,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:39,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41054fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39, skipping insertion in model container [2022-12-12 23:11:39,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:39,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:11:39,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:11:39,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,844 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,847 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,848 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,848 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,849 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,850 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,851 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,851 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,856 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,866 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-more-array-sum-alt.wvr.c[2761,2774] [2022-12-12 23:11:39,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:11:39,884 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:11:39,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,899 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,899 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,901 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,902 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,903 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,903 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,903 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,904 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:39,913 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:39,921 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-more-array-sum-alt.wvr.c[2761,2774] [2022-12-12 23:11:39,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:11:39,934 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:11:39,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39 WrapperNode [2022-12-12 23:11:39,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:11:39,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:11:39,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:11:39,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:11:39,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:39,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:39,985 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 200 [2022-12-12 23:11:39,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:11:39,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:11:39,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:11:39,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:11:39,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:39,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:40,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:40,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:40,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:40,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:40,018 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:40,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:40,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:11:40,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:11:40,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:11:40,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:11:40,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (1/1) ... [2022-12-12 23:11:40,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:11:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:40,052 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) [2022-12-12 23:11:40,071 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 [2022-12-12 23:11:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:11:40,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:11:40,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 23:11:40,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 23:11:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:11:40,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:11:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:11:40,084 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 23:11:40,215 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:11:40,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:11:40,439 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:11:40,610 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:11:40,610 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 23:11:40,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:11:40 BoogieIcfgContainer [2022-12-12 23:11:40,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:11:40,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:11:40,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:11:40,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:11:40,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:11:39" (1/3) ... [2022-12-12 23:11:40,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2654df9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:11:40, skipping insertion in model container [2022-12-12 23:11:40,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:39" (2/3) ... [2022-12-12 23:11:40,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2654df9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:11:40, skipping insertion in model container [2022-12-12 23:11:40,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:11:40" (3/3) ... [2022-12-12 23:11:40,617 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-12-12 23:11:40,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:11:40,632 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:11:40,634 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:11:40,696 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 23:11:40,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2022-12-12 23:11:40,797 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2022-12-12 23:11:40,798 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:11:40,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 104. Up to 2 conditions per place. [2022-12-12 23:11:40,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2022-12-12 23:11:40,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2022-12-12 23:11:40,809 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:11:40,827 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2022-12-12 23:11:40,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2022-12-12 23:11:40,893 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2022-12-12 23:11:40,893 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:11:40,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 104. Up to 2 conditions per place. [2022-12-12 23:11:40,895 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2022-12-12 23:11:40,896 INFO L226 LiptonReduction]: Number of co-enabled transitions 1518 [2022-12-12 23:11:45,265 INFO L241 LiptonReduction]: Total number of compositions: 105 [2022-12-12 23:11:45,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:11:45,279 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;@409762ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:11:45,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 23:11:45,283 INFO L130 PetriNetUnfolder]: 4/25 cut-off events. [2022-12-12 23:11:45,283 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:11:45,284 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:45,284 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:45,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1674226892, now seen corresponding path program 1 times [2022-12-12 23:11:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:45,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66482875] [2022-12-12 23:11:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:45,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:45,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66482875] [2022-12-12 23:11:45,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66482875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:11:45,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:11:45,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 23:11:45,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380429204] [2022-12-12 23:11:45,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:45,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 23:11:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:45,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 23:11:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 23:11:45,720 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2022-12-12 23:11:45,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:45,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:45,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2022-12-12 23:11:45,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:45,841 INFO L130 PetriNetUnfolder]: 619/869 cut-off events. [2022-12-12 23:11:45,841 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-12-12 23:11:45,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 869 events. 619/869 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3388 event pairs, 95 based on Foata normal form. 1/582 useless extension candidates. Maximal degree in co-relation 1365. Up to 688 conditions per place. [2022-12-12 23:11:45,850 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2022-12-12 23:11:45,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2022-12-12 23:11:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 23:11:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 23:11:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2022-12-12 23:11:45,858 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2022-12-12 23:11:45,861 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-12-12 23:11:45,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 44 transitions, 203 flow [2022-12-12 23:11:45,865 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 43 transitions, 196 flow [2022-12-12 23:11:45,866 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 43 transitions, 196 flow [2022-12-12 23:11:45,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:45,867 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:45,867 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:45,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:11:45,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash 693833528, now seen corresponding path program 1 times [2022-12-12 23:11:45,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:45,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876771495] [2022-12-12 23:11:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:46,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:46,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876771495] [2022-12-12 23:11:46,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876771495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:11:46,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:11:46,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:11:46,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239284803] [2022-12-12 23:11:46,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:46,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:11:46,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:46,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:11:46,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:11:46,006 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-12 23:11:46,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 43 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:46,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:46,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-12 23:11:46,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:46,219 INFO L130 PetriNetUnfolder]: 1179/1712 cut-off events. [2022-12-12 23:11:46,219 INFO L131 PetriNetUnfolder]: For 290/305 co-relation queries the response was YES. [2022-12-12 23:11:46,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 1712 events. 1179/1712 cut-off events. For 290/305 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 8171 event pairs, 174 based on Foata normal form. 1/1270 useless extension candidates. Maximal degree in co-relation 2236. Up to 1141 conditions per place. [2022-12-12 23:11:46,229 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 93 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2022-12-12 23:11:46,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 99 transitions, 648 flow [2022-12-12 23:11:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:11:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:11:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2022-12-12 23:11:46,230 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2022-12-12 23:11:46,231 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2022-12-12 23:11:46,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 99 transitions, 648 flow [2022-12-12 23:11:46,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 99 transitions, 648 flow [2022-12-12 23:11:46,238 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 99 transitions, 648 flow [2022-12-12 23:11:46,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:46,239 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:46,239 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:46,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 23:11:46,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:46,241 INFO L85 PathProgramCache]: Analyzing trace with hash -366654376, now seen corresponding path program 1 times [2022-12-12 23:11:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:46,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074609141] [2022-12-12 23:11:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:46,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:46,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074609141] [2022-12-12 23:11:46,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074609141] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046004238] [2022-12-12 23:11:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:46,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:46,357 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) [2022-12-12 23:11:46,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 23:11:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:46,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:46,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:46,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046004238] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:46,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:46,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-12 23:11:46,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930088178] [2022-12-12 23:11:46,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:46,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:46,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:11:46,563 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:11:46,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 99 transitions, 648 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:46,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:46,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:11:46,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:46,958 INFO L130 PetriNetUnfolder]: 1568/2341 cut-off events. [2022-12-12 23:11:46,958 INFO L131 PetriNetUnfolder]: For 1018/1018 co-relation queries the response was YES. [2022-12-12 23:11:46,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8769 conditions, 2341 events. 1568/2341 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10743 event pairs, 229 based on Foata normal form. 0/1873 useless extension candidates. Maximal degree in co-relation 4068. Up to 1296 conditions per place. [2022-12-12 23:11:46,971 INFO L137 encePairwiseOnDemand]: 17/26 looper letters, 190 selfloop transitions, 33 changer transitions 0/225 dead transitions. [2022-12-12 23:11:46,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 225 transitions, 1895 flow [2022-12-12 23:11:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 23:11:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 23:11:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2022-12-12 23:11:46,975 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2022-12-12 23:11:46,976 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2022-12-12 23:11:46,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 225 transitions, 1895 flow [2022-12-12 23:11:46,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 225 transitions, 1895 flow [2022-12-12 23:11:46,986 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 225 transitions, 1895 flow [2022-12-12 23:11:46,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:46,987 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:46,987 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:46,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 23:11:47,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:47,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1173966048, now seen corresponding path program 2 times [2022-12-12 23:11:47,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:47,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489070843] [2022-12-12 23:11:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:47,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:47,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489070843] [2022-12-12 23:11:47,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489070843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153304066] [2022-12-12 23:11:47,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:11:47,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:47,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:47,282 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) [2022-12-12 23:11:47,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 23:11:47,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:11:47,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:47,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:47,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:47,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153304066] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:47,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:47,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-12 23:11:47,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131967908] [2022-12-12 23:11:47,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:47,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:47,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:47,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:11:47,463 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:11:47,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 225 transitions, 1895 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:47,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:47,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:11:47,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:47,855 INFO L130 PetriNetUnfolder]: 1818/2713 cut-off events. [2022-12-12 23:11:47,855 INFO L131 PetriNetUnfolder]: For 1476/1476 co-relation queries the response was YES. [2022-12-12 23:11:47,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12784 conditions, 2713 events. 1818/2713 cut-off events. For 1476/1476 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12543 event pairs, 188 based on Foata normal form. 0/2133 useless extension candidates. Maximal degree in co-relation 6334. Up to 1635 conditions per place. [2022-12-12 23:11:47,870 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 357 selfloop transitions, 87 changer transitions 5/451 dead transitions. [2022-12-12 23:11:47,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 451 transitions, 4710 flow [2022-12-12 23:11:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 23:11:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 23:11:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2022-12-12 23:11:47,872 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2022-12-12 23:11:47,872 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 26 predicate places. [2022-12-12 23:11:47,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 451 transitions, 4710 flow [2022-12-12 23:11:47,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 446 transitions, 4654 flow [2022-12-12 23:11:47,885 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 446 transitions, 4654 flow [2022-12-12 23:11:47,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:47,885 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:47,885 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:47,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 23:11:48,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-12 23:11:48,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:48,091 INFO L85 PathProgramCache]: Analyzing trace with hash 721629536, now seen corresponding path program 3 times [2022-12-12 23:11:48,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:48,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266979660] [2022-12-12 23:11:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:48,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:48,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:48,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266979660] [2022-12-12 23:11:48,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266979660] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:48,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852797495] [2022-12-12 23:11:48,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:11:48,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:48,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:48,208 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) [2022-12-12 23:11:48,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 23:11:48,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:11:48,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:48,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:48,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:48,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852797495] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:48,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:48,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 23:11:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276929377] [2022-12-12 23:11:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:48,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:11:48,435 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:11:48,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 446 transitions, 4654 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:48,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:48,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:11:48,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:48,896 INFO L130 PetriNetUnfolder]: 2200/3276 cut-off events. [2022-12-12 23:11:48,896 INFO L131 PetriNetUnfolder]: For 3172/3172 co-relation queries the response was YES. [2022-12-12 23:11:48,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18577 conditions, 3276 events. 2200/3276 cut-off events. For 3172/3172 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15814 event pairs, 182 based on Foata normal form. 0/2578 useless extension candidates. Maximal degree in co-relation 9312. Up to 2021 conditions per place. [2022-12-12 23:11:48,912 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 484 selfloop transitions, 104 changer transitions 0/590 dead transitions. [2022-12-12 23:11:48,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 590 transitions, 7330 flow [2022-12-12 23:11:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:11:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:11:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2022-12-12 23:11:48,915 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5174825174825175 [2022-12-12 23:11:48,917 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2022-12-12 23:11:48,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 590 transitions, 7330 flow [2022-12-12 23:11:48,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 590 transitions, 7330 flow [2022-12-12 23:11:48,932 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 590 transitions, 7330 flow [2022-12-12 23:11:48,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:48,932 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:48,932 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:48,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 23:11:49,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:49,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:49,137 INFO L85 PathProgramCache]: Analyzing trace with hash 949069406, now seen corresponding path program 4 times [2022-12-12 23:11:49,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:49,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629193729] [2022-12-12 23:11:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:49,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:49,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629193729] [2022-12-12 23:11:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629193729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370818294] [2022-12-12 23:11:49,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:11:49,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:49,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:49,212 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) [2022-12-12 23:11:49,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 23:11:49,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:11:49,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:49,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:49,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:49,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370818294] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:49,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:49,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-12-12 23:11:49,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176470256] [2022-12-12 23:11:49,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:49,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:11:49,385 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:11:49,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 590 transitions, 7330 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:49,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:49,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:11:49,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:49,888 INFO L130 PetriNetUnfolder]: 2394/3542 cut-off events. [2022-12-12 23:11:49,888 INFO L131 PetriNetUnfolder]: For 3806/3806 co-relation queries the response was YES. [2022-12-12 23:11:49,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23475 conditions, 3542 events. 2394/3542 cut-off events. For 3806/3806 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17091 event pairs, 203 based on Foata normal form. 0/2802 useless extension candidates. Maximal degree in co-relation 11525. Up to 2195 conditions per place. [2022-12-12 23:11:49,905 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 549 selfloop transitions, 94 changer transitions 0/645 dead transitions. [2022-12-12 23:11:49,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 645 transitions, 9303 flow [2022-12-12 23:11:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:11:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:11:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2022-12-12 23:11:49,907 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5034965034965035 [2022-12-12 23:11:49,907 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2022-12-12 23:11:49,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 645 transitions, 9303 flow [2022-12-12 23:11:49,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 645 transitions, 9303 flow [2022-12-12 23:11:49,924 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 645 transitions, 9303 flow [2022-12-12 23:11:49,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:49,924 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:49,924 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:49,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 23:11:50,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:50,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1767508008, now seen corresponding path program 5 times [2022-12-12 23:11:50,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:50,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53974287] [2022-12-12 23:11:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:50,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:50,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:50,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53974287] [2022-12-12 23:11:50,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53974287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:50,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082433163] [2022-12-12 23:11:50,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:11:50,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:50,200 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) [2022-12-12 23:11:50,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 23:11:50,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:11:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:11:50,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:50,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:50,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082433163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:11:50,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:11:50,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-12 23:11:50,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250434828] [2022-12-12 23:11:50,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:11:50,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:11:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:11:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:11:50,414 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 23:11:50,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 645 transitions, 9303 flow. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:50,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:50,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 23:11:50,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:51,698 INFO L130 PetriNetUnfolder]: 3031/4463 cut-off events. [2022-12-12 23:11:51,698 INFO L131 PetriNetUnfolder]: For 4844/4844 co-relation queries the response was YES. [2022-12-12 23:11:51,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33909 conditions, 4463 events. 3031/4463 cut-off events. For 4844/4844 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21890 event pairs, 40 based on Foata normal form. 0/3561 useless extension candidates. Maximal degree in co-relation 23305. Up to 3020 conditions per place. [2022-12-12 23:11:51,722 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 799 selfloop transitions, 283 changer transitions 0/1082 dead transitions. [2022-12-12 23:11:51,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 1082 transitions, 17469 flow [2022-12-12 23:11:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-12 23:11:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-12 23:11:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 345 transitions. [2022-12-12 23:11:51,725 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3317307692307692 [2022-12-12 23:11:51,725 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 85 predicate places. [2022-12-12 23:11:51,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 1082 transitions, 17469 flow [2022-12-12 23:11:51,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 1082 transitions, 17469 flow [2022-12-12 23:11:51,748 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 1082 transitions, 17469 flow [2022-12-12 23:11:51,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:51,748 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:51,749 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:51,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 23:11:51,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:51,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash 165397876, now seen corresponding path program 6 times [2022-12-12 23:11:51,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:51,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344350207] [2022-12-12 23:11:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:51,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:52,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:52,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344350207] [2022-12-12 23:11:52,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344350207] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:52,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141087286] [2022-12-12 23:11:52,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:11:52,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:52,022 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) [2022-12-12 23:11:52,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 23:11:52,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:11:52,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:52,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:52,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141087286] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:52,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:52,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 23:11:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552610476] [2022-12-12 23:11:52,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:52,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:52,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:11:52,203 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:11:52,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 1082 transitions, 17469 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:52,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:52,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:11:52,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:52,892 INFO L130 PetriNetUnfolder]: 3080/4520 cut-off events. [2022-12-12 23:11:52,892 INFO L131 PetriNetUnfolder]: For 6144/6144 co-relation queries the response was YES. [2022-12-12 23:11:52,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38583 conditions, 4520 events. 3080/4520 cut-off events. For 6144/6144 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22128 event pairs, 40 based on Foata normal form. 0/3616 useless extension candidates. Maximal degree in co-relation 26750. Up to 3077 conditions per place. [2022-12-12 23:11:52,915 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 869 selfloop transitions, 213 changer transitions 0/1101 dead transitions. [2022-12-12 23:11:52,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 1101 transitions, 19940 flow [2022-12-12 23:11:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 23:11:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 23:11:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2022-12-12 23:11:52,916 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48846153846153845 [2022-12-12 23:11:52,916 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 94 predicate places. [2022-12-12 23:11:52,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 1101 transitions, 19940 flow [2022-12-12 23:11:52,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 1101 transitions, 19940 flow [2022-12-12 23:11:52,939 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 1101 transitions, 19940 flow [2022-12-12 23:11:52,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:52,940 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:52,940 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:52,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-12 23:11:53,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:53,145 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:53,145 INFO L85 PathProgramCache]: Analyzing trace with hash 619260374, now seen corresponding path program 1 times [2022-12-12 23:11:53,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:53,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681857254] [2022-12-12 23:11:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:53,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:53,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:53,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681857254] [2022-12-12 23:11:53,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681857254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:11:53,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:11:53,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:11:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108321776] [2022-12-12 23:11:53,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:53,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:11:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:11:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:11:53,259 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-12 23:11:53,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 1101 transitions, 19940 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:53,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:53,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-12 23:11:53,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:53,781 INFO L130 PetriNetUnfolder]: 2722/4024 cut-off events. [2022-12-12 23:11:53,781 INFO L131 PetriNetUnfolder]: For 7916/7916 co-relation queries the response was YES. [2022-12-12 23:11:53,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37997 conditions, 4024 events. 2722/4024 cut-off events. For 7916/7916 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19477 event pairs, 18 based on Foata normal form. 0/3244 useless extension candidates. Maximal degree in co-relation 29592. Up to 3077 conditions per place. [2022-12-12 23:11:53,802 INFO L137 encePairwiseOnDemand]: 20/26 looper letters, 1053 selfloop transitions, 52 changer transitions 8/1141 dead transitions. [2022-12-12 23:11:53,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1141 transitions, 22957 flow [2022-12-12 23:11:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:11:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:11:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2022-12-12 23:11:53,803 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2022-12-12 23:11:53,804 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 87 predicate places. [2022-12-12 23:11:53,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 1141 transitions, 22957 flow [2022-12-12 23:11:53,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 1133 transitions, 22791 flow [2022-12-12 23:11:53,827 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 1133 transitions, 22791 flow [2022-12-12 23:11:53,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:53,827 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:53,827 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-12 23:11:53,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:53,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1171641266, now seen corresponding path program 1 times [2022-12-12 23:11:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:53,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122797074] [2022-12-12 23:11:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:53,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:53,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122797074] [2022-12-12 23:11:53,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122797074] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:11:53,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:11:53,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:11:53,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697251031] [2022-12-12 23:11:53,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:53,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:11:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:53,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:11:53,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:11:53,928 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:11:53,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 1133 transitions, 22791 flow. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:53,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:53,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:11:53,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:54,422 INFO L130 PetriNetUnfolder]: 2333/3423 cut-off events. [2022-12-12 23:11:54,423 INFO L131 PetriNetUnfolder]: For 7546/7546 co-relation queries the response was YES. [2022-12-12 23:11:54,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35627 conditions, 3423 events. 2333/3423 cut-off events. For 7546/7546 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15723 event pairs, 8 based on Foata normal form. 30/2733 useless extension candidates. Maximal degree in co-relation 32524. Up to 3083 conditions per place. [2022-12-12 23:11:54,442 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 979 selfloop transitions, 2 changer transitions 45/1040 dead transitions. [2022-12-12 23:11:54,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 1040 transitions, 22958 flow [2022-12-12 23:11:54,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:11:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:11:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2022-12-12 23:11:54,443 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2022-12-12 23:11:54,443 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 85 predicate places. [2022-12-12 23:11:54,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 1040 transitions, 22958 flow [2022-12-12 23:11:54,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 995 transitions, 21979 flow [2022-12-12 23:11:54,464 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 995 transitions, 21979 flow [2022-12-12 23:11:54,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:54,464 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:54,464 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-12 23:11:54,465 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1762213286, now seen corresponding path program 1 times [2022-12-12 23:11:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:54,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236490474] [2022-12-12 23:11:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:54,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:54,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236490474] [2022-12-12 23:11:54,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236490474] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:54,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227559204] [2022-12-12 23:11:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:54,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:54,519 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) [2022-12-12 23:11:54,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 23:11:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:54,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:11:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:54,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:54,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227559204] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:54,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:54,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-12 23:11:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111199366] [2022-12-12 23:11:54,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:11:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:11:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:11:54,644 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-12 23:11:54,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 995 transitions, 21979 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:54,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:54,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-12 23:11:54,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:55,118 INFO L130 PetriNetUnfolder]: 2260/3261 cut-off events. [2022-12-12 23:11:55,118 INFO L131 PetriNetUnfolder]: For 6533/6533 co-relation queries the response was YES. [2022-12-12 23:11:55,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37198 conditions, 3261 events. 2260/3261 cut-off events. For 6533/6533 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14243 event pairs, 40 based on Foata normal form. 0/2594 useless extension candidates. Maximal degree in co-relation 35722. Up to 3089 conditions per place. [2022-12-12 23:11:55,135 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 956 selfloop transitions, 86 changer transitions 0/1066 dead transitions. [2022-12-12 23:11:55,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 1066 transitions, 25520 flow [2022-12-12 23:11:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:11:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:11:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2022-12-12 23:11:55,136 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2022-12-12 23:11:55,136 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 82 predicate places. [2022-12-12 23:11:55,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 1066 transitions, 25520 flow [2022-12-12 23:11:55,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 1066 transitions, 25520 flow [2022-12-12 23:11:55,156 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 1066 transitions, 25520 flow [2022-12-12 23:11:55,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:55,156 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:55,156 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:55,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-12 23:11:55,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:55,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash -336301728, now seen corresponding path program 1 times [2022-12-12 23:11:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:55,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208007756] [2022-12-12 23:11:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:55,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:55,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208007756] [2022-12-12 23:11:55,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208007756] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674735738] [2022-12-12 23:11:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:55,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:55,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:55,692 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) [2022-12-12 23:11:55,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 23:11:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:55,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-12 23:11:55,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:55,833 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 [2022-12-12 23:11:55,869 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 [2022-12-12 23:11:55,897 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 [2022-12-12 23:11:55,919 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 [2022-12-12 23:11:55,956 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 15 treesize of output 7 [2022-12-12 23:11:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:55,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:56,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674735738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:11:56,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:11:56,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 5] total 15 [2022-12-12 23:11:56,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168009834] [2022-12-12 23:11:56,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:11:56,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 23:11:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:56,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 23:11:56,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-12 23:11:56,027 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:11:56,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 1066 transitions, 25520 flow. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:56,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:56,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:11:56,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:57,249 INFO L130 PetriNetUnfolder]: 3908/5672 cut-off events. [2022-12-12 23:11:57,249 INFO L131 PetriNetUnfolder]: For 7095/7095 co-relation queries the response was YES. [2022-12-12 23:11:57,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71427 conditions, 5672 events. 3908/5672 cut-off events. For 7095/7095 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27766 event pairs, 11 based on Foata normal form. 3/4429 useless extension candidates. Maximal degree in co-relation 67839. Up to 5480 conditions per place. [2022-12-12 23:11:57,285 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 1504 selfloop transitions, 271 changer transitions 9/1798 dead transitions. [2022-12-12 23:11:57,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 1798 transitions, 46906 flow [2022-12-12 23:11:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 23:11:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 23:11:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 158 transitions. [2022-12-12 23:11:57,286 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2022-12-12 23:11:57,286 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 93 predicate places. [2022-12-12 23:11:57,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 1798 transitions, 46906 flow [2022-12-12 23:11:57,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 1789 transitions, 46654 flow [2022-12-12 23:11:57,329 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 1789 transitions, 46654 flow [2022-12-12 23:11:57,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:57,329 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:57,330 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:57,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 23:11:57,534 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,SelfDestructingSolverStorable11 [2022-12-12 23:11:57,535 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1288029160, now seen corresponding path program 1 times [2022-12-12 23:11:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:57,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047305455] [2022-12-12 23:11:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:57,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:58,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047305455] [2022-12-12 23:11:58,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047305455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483692767] [2022-12-12 23:11:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:58,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:58,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:58,013 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) [2022-12-12 23:11:58,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 23:11:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-12 23:11:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:58,130 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 [2022-12-12 23:11:58,168 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 [2022-12-12 23:11:58,202 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 [2022-12-12 23:11:58,231 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 [2022-12-12 23:11:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:11:58,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:11:58,387 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 17 treesize of output 10 [2022-12-12 23:11:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:58,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:11:58,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483692767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:11:58,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:11:58,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2022-12-12 23:11:58,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036394347] [2022-12-12 23:11:58,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:11:58,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 23:11:58,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 23:11:58,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=872, Unknown=4, NotChecked=0, Total=992 [2022-12-12 23:11:58,671 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 23:11:58,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 1789 transitions, 46654 flow. Second operand has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:11:58,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:58,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 23:11:58,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:02,702 INFO L130 PetriNetUnfolder]: 5466/7930 cut-off events. [2022-12-12 23:12:02,703 INFO L131 PetriNetUnfolder]: For 8587/8587 co-relation queries the response was YES. [2022-12-12 23:12:02,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108390 conditions, 7930 events. 5466/7930 cut-off events. For 8587/8587 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 41732 event pairs, 11 based on Foata normal form. 1/6302 useless extension candidates. Maximal degree in co-relation 103789. Up to 7721 conditions per place. [2022-12-12 23:12:02,757 INFO L137 encePairwiseOnDemand]: 7/26 looper letters, 1815 selfloop transitions, 786 changer transitions 6/2607 dead transitions. [2022-12-12 23:12:02,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 2607 transitions, 73161 flow [2022-12-12 23:12:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-12 23:12:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-12 23:12:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 314 transitions. [2022-12-12 23:12:02,759 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36596736596736595 [2022-12-12 23:12:02,759 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 125 predicate places. [2022-12-12 23:12:02,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 2607 transitions, 73161 flow [2022-12-12 23:12:02,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 2601 transitions, 72984 flow [2022-12-12 23:12:02,885 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 2601 transitions, 72984 flow [2022-12-12 23:12:02,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:02,885 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:02,885 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:02,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 23:12:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 23:12:03,086 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:03,086 INFO L85 PathProgramCache]: Analyzing trace with hash 87233132, now seen corresponding path program 2 times [2022-12-12 23:12:03,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:03,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848751625] [2022-12-12 23:12:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:03,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:03,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848751625] [2022-12-12 23:12:03,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848751625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603540955] [2022-12-12 23:12:03,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:12:03,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:03,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:03,427 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) [2022-12-12 23:12:03,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 23:12:03,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:12:03,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-12 23:12:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:03,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:03,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:03,740 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 17 treesize of output 10 [2022-12-12 23:12:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:03,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:03,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:03,834 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 23 treesize of output 20 [2022-12-12 23:12:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:04,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603540955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:04,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:04,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-12-12 23:12:04,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362575044] [2022-12-12 23:12:04,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:04,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 23:12:04,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 23:12:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-12-12 23:12:04,016 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:12:04,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 2601 transitions, 72984 flow. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:04,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:04,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:12:04,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:09,759 INFO L130 PetriNetUnfolder]: 9901/14580 cut-off events. [2022-12-12 23:12:09,759 INFO L131 PetriNetUnfolder]: For 17059/17059 co-relation queries the response was YES. [2022-12-12 23:12:09,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214664 conditions, 14580 events. 9901/14580 cut-off events. For 17059/17059 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 86524 event pairs, 35 based on Foata normal form. 6/11440 useless extension candidates. Maximal degree in co-relation 172001. Up to 14283 conditions per place. [2022-12-12 23:12:09,860 INFO L137 encePairwiseOnDemand]: 13/26 looper letters, 3660 selfloop transitions, 1178 changer transitions 24/4884 dead transitions. [2022-12-12 23:12:09,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 4884 transitions, 147162 flow [2022-12-12 23:12:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 23:12:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 23:12:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 298 transitions. [2022-12-12 23:12:09,861 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2022-12-12 23:12:09,862 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 148 predicate places. [2022-12-12 23:12:09,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 4884 transitions, 147162 flow [2022-12-12 23:12:09,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 4860 transitions, 146400 flow [2022-12-12 23:12:09,988 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 4860 transitions, 146400 flow [2022-12-12 23:12:09,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:09,988 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:09,989 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:09,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 23:12:10,194 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,SelfDestructingSolverStorable13 [2022-12-12 23:12:10,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:10,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1361896634, now seen corresponding path program 2 times [2022-12-12 23:12:10,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201816749] [2022-12-12 23:12:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:10,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:10,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201816749] [2022-12-12 23:12:10,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201816749] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694563329] [2022-12-12 23:12:10,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:12:10,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:10,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:10,549 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) [2022-12-12 23:12:10,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 23:12:10,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:12:10,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 23:12:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:10,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:12:10,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:12:10,770 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 15 treesize of output 7 [2022-12-12 23:12:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:10,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:10,837 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_575 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_575) c_~A~0.base) c_~A~0.offset) c_~res2~0) c_~res1~0)) is different from false [2022-12-12 23:12:10,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:10,845 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 46 treesize of output 36 [2022-12-12 23:12:10,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-12 23:12:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-12 23:12:10,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694563329] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:10,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:10,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-12 23:12:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034913326] [2022-12-12 23:12:10,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:10,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 23:12:10,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:10,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 23:12:10,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=344, Unknown=3, NotChecked=38, Total=462 [2022-12-12 23:12:10,903 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:12:10,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 4860 transitions, 146400 flow. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 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) [2022-12-12 23:12:10,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:10,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:12:10,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:20,607 INFO L130 PetriNetUnfolder]: 11431/16846 cut-off events. [2022-12-12 23:12:20,608 INFO L131 PetriNetUnfolder]: For 23973/23973 co-relation queries the response was YES. [2022-12-12 23:12:20,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264758 conditions, 16846 events. 11431/16846 cut-off events. For 23973/23973 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 102606 event pairs, 14 based on Foata normal form. 6/13161 useless extension candidates. Maximal degree in co-relation 206780. Up to 16549 conditions per place. [2022-12-12 23:12:20,728 INFO L137 encePairwiseOnDemand]: 17/26 looper letters, 4561 selfloop transitions, 947 changer transitions 18/5587 dead transitions. [2022-12-12 23:12:20,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 5587 transitions, 179642 flow [2022-12-12 23:12:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 23:12:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 23:12:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 180 transitions. [2022-12-12 23:12:20,731 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5325443786982249 [2022-12-12 23:12:20,731 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 160 predicate places. [2022-12-12 23:12:20,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 5587 transitions, 179642 flow [2022-12-12 23:12:20,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 5569 transitions, 179030 flow [2022-12-12 23:12:20,885 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 5569 transitions, 179030 flow [2022-12-12 23:12:20,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 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) [2022-12-12 23:12:20,885 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:20,886 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:20,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 23:12:21,086 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,SelfDestructingSolverStorable14 [2022-12-12 23:12:21,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1375712556, now seen corresponding path program 3 times [2022-12-12 23:12:21,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:21,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395440719] [2022-12-12 23:12:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:21,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:21,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:21,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395440719] [2022-12-12 23:12:21,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395440719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:21,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529037445] [2022-12-12 23:12:21,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:12:21,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:21,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:21,664 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) [2022-12-12 23:12:21,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 23:12:21,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:12:21,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:21,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-12 23:12:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:21,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:12:21,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:12:22,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:22,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:22,017 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 17 treesize of output 10 [2022-12-12 23:12:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:22,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:22,081 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_620 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))) c_~res2~0) c_~res1~0)) is different from false [2022-12-12 23:12:22,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:22,139 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 54 treesize of output 42 [2022-12-12 23:12:22,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-12-12 23:12:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:22,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529037445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:22,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:22,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-12-12 23:12:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553417997] [2022-12-12 23:12:22,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:22,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 23:12:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 23:12:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=714, Unknown=1, NotChecked=54, Total=870 [2022-12-12 23:12:22,233 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 23:12:22,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 5569 transitions, 179030 flow. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:22,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:22,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 23:12:22,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:37,930 INFO L130 PetriNetUnfolder]: 13464/19917 cut-off events. [2022-12-12 23:12:37,930 INFO L131 PetriNetUnfolder]: For 27869/27869 co-relation queries the response was YES. [2022-12-12 23:12:37,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333330 conditions, 19917 events. 13464/19917 cut-off events. For 27869/27869 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 125556 event pairs, 4 based on Foata normal form. 6/15520 useless extension candidates. Maximal degree in co-relation 242913. Up to 19620 conditions per place. [2022-12-12 23:12:38,081 INFO L137 encePairwiseOnDemand]: 4/26 looper letters, 4608 selfloop transitions, 2059 changer transitions 27/6694 dead transitions. [2022-12-12 23:12:38,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 6694 transitions, 228630 flow [2022-12-12 23:12:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-12 23:12:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-12 23:12:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 491 transitions. [2022-12-12 23:12:38,083 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3702865761689291 [2022-12-12 23:12:38,083 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 210 predicate places. [2022-12-12 23:12:38,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 6694 transitions, 228630 flow [2022-12-12 23:12:38,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 6667 transitions, 227667 flow [2022-12-12 23:12:38,277 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 6667 transitions, 227667 flow [2022-12-12 23:12:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:38,278 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:38,278 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:38,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 23:12:38,478 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,SelfDestructingSolverStorable15 [2022-12-12 23:12:38,478 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2113759446, now seen corresponding path program 3 times [2022-12-12 23:12:38,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:38,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446132572] [2022-12-12 23:12:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:38,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446132572] [2022-12-12 23:12:38,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446132572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:38,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832377436] [2022-12-12 23:12:38,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:12:38,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:38,742 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) [2022-12-12 23:12:38,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 23:12:38,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:12:38,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 23:12:38,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:38,925 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 22 treesize of output 10 [2022-12-12 23:12:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:38,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:38,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:38,978 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 23 treesize of output 20 [2022-12-12 23:12:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:39,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832377436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:39,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:39,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2022-12-12 23:12:39,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976473878] [2022-12-12 23:12:39,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:39,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:12:39,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:39,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:12:39,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:12:39,016 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:12:39,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 6667 transitions, 227667 flow. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:39,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:39,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:12:39,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:56,206 INFO L130 PetriNetUnfolder]: 15094/22309 cut-off events. [2022-12-12 23:12:56,206 INFO L131 PetriNetUnfolder]: For 43155/43155 co-relation queries the response was YES. [2022-12-12 23:12:56,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395467 conditions, 22309 events. 15094/22309 cut-off events. For 43155/43155 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 142390 event pairs, 4 based on Foata normal form. 6/17446 useless extension candidates. Maximal degree in co-relation 294202. Up to 22012 conditions per place. [2022-12-12 23:12:56,407 INFO L137 encePairwiseOnDemand]: 17/26 looper letters, 6912 selfloop transitions, 524 changer transitions 18/7542 dead transitions. [2022-12-12 23:12:56,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 7542 transitions, 272455 flow [2022-12-12 23:12:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:12:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:12:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2022-12-12 23:12:56,408 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43006993006993005 [2022-12-12 23:12:56,408 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 220 predicate places. [2022-12-12 23:12:56,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 7542 transitions, 272455 flow [2022-12-12 23:12:56,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 7524 transitions, 271771 flow [2022-12-12 23:12:56,665 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 7524 transitions, 271771 flow [2022-12-12 23:12:56,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:56,665 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:56,665 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:56,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-12 23:12:56,867 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,SelfDestructingSolverStorable16 [2022-12-12 23:12:56,868 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:56,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1444381152, now seen corresponding path program 4 times [2022-12-12 23:12:56,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:56,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902661488] [2022-12-12 23:12:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:56,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:57,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902661488] [2022-12-12 23:12:57,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902661488] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:57,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222499797] [2022-12-12 23:12:57,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:12:57,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:57,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:57,133 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) [2022-12-12 23:12:57,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 23:12:57,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:12:57,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-12 23:12:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:57,265 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 [2022-12-12 23:12:57,294 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 [2022-12-12 23:12:57,321 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 [2022-12-12 23:12:57,341 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 [2022-12-12 23:12:57,394 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 22 treesize of output 10 [2022-12-12 23:12:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:57,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:57,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222499797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:57,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:57,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 5] total 16 [2022-12-12 23:12:57,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623351057] [2022-12-12 23:12:57,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:57,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 23:12:57,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:57,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 23:12:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-12 23:12:57,480 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:12:57,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 7524 transitions, 271771 flow. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:57,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:57,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:12:57,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:13:24,045 INFO L130 PetriNetUnfolder]: 16358/24169 cut-off events. [2022-12-12 23:13:24,046 INFO L131 PetriNetUnfolder]: For 54875/54875 co-relation queries the response was YES. [2022-12-12 23:13:24,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452295 conditions, 24169 events. 16358/24169 cut-off events. For 54875/54875 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 155968 event pairs, 8 based on Foata normal form. 6/18894 useless extension candidates. Maximal degree in co-relation 344589. Up to 23872 conditions per place. [2022-12-12 23:13:24,261 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 7474 selfloop transitions, 523 changer transitions 18/8103 dead transitions. [2022-12-12 23:13:24,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 8103 transitions, 308879 flow [2022-12-12 23:13:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 23:13:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 23:13:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2022-12-12 23:13:24,262 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2022-12-12 23:13:24,263 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 231 predicate places. [2022-12-12 23:13:24,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 8103 transitions, 308879 flow [2022-12-12 23:13:24,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 8085 transitions, 308159 flow [2022-12-12 23:13:24,546 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 8085 transitions, 308159 flow [2022-12-12 23:13:24,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:13:24,547 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:13:24,547 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:13:24,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 23:13:24,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:13:24,747 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:13:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:13:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash 217560576, now seen corresponding path program 5 times [2022-12-12 23:13:24,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:13:24,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687800445] [2022-12-12 23:13:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:13:24,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:13:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:13:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:13:25,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:13:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687800445] [2022-12-12 23:13:25,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687800445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:13:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590058283] [2022-12-12 23:13:25,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:13:25,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:13:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:13:25,212 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) [2022-12-12 23:13:25,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 23:13:25,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:13:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:13:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 23:13:25,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:13:25,385 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 15 treesize of output 7 [2022-12-12 23:13:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:25,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:13:25,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:13:25,436 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 23 treesize of output 20 [2022-12-12 23:13:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:25,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590058283] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:13:25,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:13:25,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 16 [2022-12-12 23:13:25,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979227205] [2022-12-12 23:13:25,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:13:25,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 23:13:25,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:13:25,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 23:13:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-12-12 23:13:25,476 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:13:25,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 8085 transitions, 308159 flow. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:13:25,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:13:25,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:13:25,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:14:00,965 INFO L130 PetriNetUnfolder]: 18614/27501 cut-off events. [2022-12-12 23:14:00,966 INFO L131 PetriNetUnfolder]: For 70017/70017 co-relation queries the response was YES. [2022-12-12 23:14:00,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542136 conditions, 27501 events. 18614/27501 cut-off events. For 70017/70017 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 181267 event pairs, 16 based on Foata normal form. 8/21411 useless extension candidates. Maximal degree in co-relation 418991. Up to 27204 conditions per place. [2022-12-12 23:14:01,319 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 8271 selfloop transitions, 682 changer transitions 24/9065 dead transitions. [2022-12-12 23:14:01,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 9065 transitions, 363872 flow [2022-12-12 23:14:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 23:14:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 23:14:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 151 transitions. [2022-12-12 23:14:01,320 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4467455621301775 [2022-12-12 23:14:01,320 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 243 predicate places. [2022-12-12 23:14:01,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 275 places, 9065 transitions, 363872 flow [2022-12-12 23:14:01,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 275 places, 9041 transitions, 362864 flow [2022-12-12 23:14:01,628 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 9041 transitions, 362864 flow [2022-12-12 23:14:01,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:14:01,628 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:14:01,628 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:14:01,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 23:14:01,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:14:01,836 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:14:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:14:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1202752100, now seen corresponding path program 6 times [2022-12-12 23:14:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:14:01,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005809814] [2022-12-12 23:14:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:14:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:14:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:14:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:02,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:14:02,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005809814] [2022-12-12 23:14:02,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005809814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:14:02,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853576701] [2022-12-12 23:14:02,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:14:02,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:14:02,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:14:02,049 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) [2022-12-12 23:14:02,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 23:14:02,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:14:02,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:14:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 23:14:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:14:02,213 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 15 treesize of output 7 [2022-12-12 23:14:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:02,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:14:02,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:14:02,256 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 23 treesize of output 20 [2022-12-12 23:14:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:02,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853576701] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:14:02,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:14:02,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2022-12-12 23:14:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905897812] [2022-12-12 23:14:02,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:14:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:14:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:14:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:14:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:14:02,292 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:14:02,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 9041 transitions, 362864 flow. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2022-12-12 23:14:02,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:14:02,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:14:02,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:14:53,754 INFO L130 PetriNetUnfolder]: 21474/31719 cut-off events. [2022-12-12 23:14:53,754 INFO L131 PetriNetUnfolder]: For 92429/92429 co-relation queries the response was YES. [2022-12-12 23:14:53,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656928 conditions, 31719 events. 21474/31719 cut-off events. For 92429/92429 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 213274 event pairs, 21 based on Foata normal form. 8/24592 useless extension candidates. Maximal degree in co-relation 499070. Up to 31422 conditions per place. [2022-12-12 23:14:54,045 INFO L137 encePairwiseOnDemand]: 17/26 looper letters, 9474 selfloop transitions, 757 changer transitions 24/10343 dead transitions. [2022-12-12 23:14:54,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 10343 transitions, 436162 flow [2022-12-12 23:14:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:14:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:14:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 149 transitions. [2022-12-12 23:14:54,046 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5209790209790209 [2022-12-12 23:14:54,046 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 253 predicate places. [2022-12-12 23:14:54,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 285 places, 10343 transitions, 436162 flow [2022-12-12 23:14:54,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 10319 transitions, 435106 flow [2022-12-12 23:14:54,412 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 10319 transitions, 435106 flow [2022-12-12 23:14:54,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2022-12-12 23:14:54,413 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:14:54,413 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:14:54,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 23:14:54,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:14:54,613 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:14:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:14:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1499740198, now seen corresponding path program 4 times [2022-12-12 23:14:54,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:14:54,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54349382] [2022-12-12 23:14:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:14:54,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:14:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:14:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:14:54,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:14:54,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54349382] [2022-12-12 23:14:54,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54349382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:14:54,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513736263] [2022-12-12 23:14:54,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:14:54,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:14:54,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:14:54,966 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) [2022-12-12 23:14:54,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 23:14:55,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:14:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:14:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-12 23:14:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:14:55,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:14:55,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:14:55,237 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 17 treesize of output 10 [2022-12-12 23:14:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:55,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:14:55,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:14:55,286 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 23 treesize of output 20 [2022-12-12 23:14:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:55,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513736263] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:14:55,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:14:55,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2022-12-12 23:14:55,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506681923] [2022-12-12 23:14:55,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:14:55,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 23:14:55,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:14:55,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 23:14:55,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-12-12 23:14:55,404 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 23:14:55,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 10319 transitions, 435106 flow. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:14:55,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:14:55,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 23:14:55,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:15:55,134 INFO L130 PetriNetUnfolder]: 21969/32458 cut-off events. [2022-12-12 23:15:55,134 INFO L131 PetriNetUnfolder]: For 100116/100116 co-relation queries the response was YES. [2022-12-12 23:15:55,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704645 conditions, 32458 events. 21969/32458 cut-off events. For 100116/100116 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 219367 event pairs, 22 based on Foata normal form. 1/25212 useless extension candidates. Maximal degree in co-relation 545782. Up to 32161 conditions per place. [2022-12-12 23:15:55,433 INFO L137 encePairwiseOnDemand]: 13/26 looper letters, 8009 selfloop transitions, 2667 changer transitions 6/10682 dead transitions. [2022-12-12 23:15:55,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 10682 transitions, 471547 flow [2022-12-12 23:15:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 23:15:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 23:15:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 173 transitions. [2022-12-12 23:15:55,434 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3326923076923077 [2022-12-12 23:15:55,434 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 272 predicate places. [2022-12-12 23:15:55,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 10682 transitions, 471547 flow [2022-12-12 23:15:55,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 10676 transitions, 471274 flow [2022-12-12 23:15:55,830 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 10676 transitions, 471274 flow [2022-12-12 23:15:55,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:15:55,830 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:15:55,830 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:15:55,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 23:15:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:15:56,031 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:15:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:15:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1883032, now seen corresponding path program 5 times [2022-12-12 23:15:56,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:15:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815663991] [2022-12-12 23:15:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:15:56,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:15:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:15:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:15:56,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:15:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815663991] [2022-12-12 23:15:56,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815663991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:15:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269852966] [2022-12-12 23:15:56,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:15:56,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:15:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:15:56,382 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) [2022-12-12 23:15:56,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 23:15:56,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:15:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:15:56,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-12 23:15:56,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:15:56,715 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 22 treesize of output 10 [2022-12-12 23:15:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:15:56,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:15:56,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:15:56,769 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 23 treesize of output 20 [2022-12-12 23:15:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:15:56,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269852966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:15:56,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:15:56,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-12-12 23:15:56,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40974370] [2022-12-12 23:15:56,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:15:56,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 23:15:56,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:15:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 23:15:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-12-12 23:15:56,961 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:15:56,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 10676 transitions, 471274 flow. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:15:56,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:15:56,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:15:56,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:17:01,502 INFO L130 PetriNetUnfolder]: 24343/35941 cut-off events. [2022-12-12 23:17:01,503 INFO L131 PetriNetUnfolder]: For 110533/110533 co-relation queries the response was YES. [2022-12-12 23:17:01,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816631 conditions, 35941 events. 24343/35941 cut-off events. For 110533/110533 co-relation queries the response was YES. Maximal size of possible extension queue 1733. Compared 246695 event pairs, 28 based on Foata normal form. 8/28070 useless extension candidates. Maximal degree in co-relation 643462. Up to 35644 conditions per place. [2022-12-12 23:17:01,996 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 10202 selfloop transitions, 1831 changer transitions 36/12114 dead transitions. [2022-12-12 23:17:01,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 12114 transitions, 558960 flow [2022-12-12 23:17:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-12 23:17:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-12 23:17:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 246 transitions. [2022-12-12 23:17:01,998 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33791208791208793 [2022-12-12 23:17:01,998 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 299 predicate places. [2022-12-12 23:17:01,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 12114 transitions, 558960 flow [2022-12-12 23:17:02,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 12078 transitions, 557244 flow [2022-12-12 23:17:02,466 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 12078 transitions, 557244 flow [2022-12-12 23:17:02,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:17:02,466 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:17:02,466 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:17:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 23:17:02,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:17:02,667 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:17:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:17:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1736761042, now seen corresponding path program 6 times [2022-12-12 23:17:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:17:02,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666605079] [2022-12-12 23:17:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:17:02,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:17:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:17:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:17:03,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:17:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666605079] [2022-12-12 23:17:03,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666605079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:17:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739475953] [2022-12-12 23:17:03,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:17:03,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:17:03,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:17:03,073 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) [2022-12-12 23:17:03,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 23:17:03,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:17:03,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:17:03,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-12 23:17:03,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:17:03,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:17:03,330 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 17 treesize of output 17 [2022-12-12 23:17:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:17:03,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:17:03,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:17:03,481 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 23 treesize of output 20 [2022-12-12 23:17:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:17:03,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739475953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:17:03,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:17:03,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2022-12-12 23:17:03,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367827744] [2022-12-12 23:17:03,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:17:03,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 23:17:03,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:17:03,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 23:17:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-12-12 23:17:03,592 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 23:17:03,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 12078 transitions, 557244 flow. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:17:03,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:17:03,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 23:17:03,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:27,357 INFO L130 PetriNetUnfolder]: 33676/49657 cut-off events. [2022-12-12 23:19:27,357 INFO L131 PetriNetUnfolder]: For 146235/146235 co-relation queries the response was YES. [2022-12-12 23:19:27,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181141 conditions, 49657 events. 33676/49657 cut-off events. For 146235/146235 co-relation queries the response was YES. Maximal size of possible extension queue 2489. Compared 355475 event pairs, 29 based on Foata normal form. 12/38791 useless extension candidates. Maximal degree in co-relation 931866. Up to 49314 conditions per place. [2022-12-12 23:19:27,883 INFO L137 encePairwiseOnDemand]: 10/26 looper letters, 11188 selfloop transitions, 5663 changer transitions 54/16905 dead transitions. [2022-12-12 23:19:27,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 16905 transitions, 814459 flow [2022-12-12 23:19:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-12 23:19:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-12-12 23:19:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 906 transitions. [2022-12-12 23:19:27,893 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28798474253019707 [2022-12-12 23:19:27,893 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 419 predicate places. [2022-12-12 23:19:27,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 451 places, 16905 transitions, 814459 flow [2022-12-12 23:19:28,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 451 places, 16851 transitions, 811777 flow [2022-12-12 23:19:28,683 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 16851 transitions, 811777 flow [2022-12-12 23:19:28,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:19:28,683 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:28,683 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:28,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-12 23:19:28,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:19:28,884 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:19:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1971380432, now seen corresponding path program 7 times [2022-12-12 23:19:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:28,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771182901] [2022-12-12 23:19:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:29,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771182901] [2022-12-12 23:19:29,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771182901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:19:29,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131170059] [2022-12-12 23:19:29,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:19:29,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:19:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:19:29,290 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) [2022-12-12 23:19:29,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 23:19:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:29,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-12 23:19:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:19:29,420 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 [2022-12-12 23:19:29,450 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 [2022-12-12 23:19:29,473 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 [2022-12-12 23:19:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:19:29,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:19:29,591 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 15 treesize of output 7 [2022-12-12 23:19:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:19:29,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:19:29,625 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_982 (Array Int Int))) (= (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_982) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) c_~res2~0)) is different from false [2022-12-12 23:19:29,630 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_982 (Array Int Int))) (= (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_982) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) |c_thread2Thread1of1ForFork2_~tmp~1#1|)) is different from false [2022-12-12 23:19:29,653 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_982 (Array Int Int))) (= (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_982) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2022-12-12 23:19:29,656 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_982 (Array Int Int))) (= (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_982) c_~A~0.base) c_~A~0.offset)) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2022-12-12 23:19:29,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:29,713 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 54 treesize of output 43 [2022-12-12 23:19:29,716 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 634 treesize of output 594 [2022-12-12 23:19:29,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 594 treesize of output 562 [2022-12-12 23:19:29,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 562 treesize of output 542 [2022-12-12 23:19:29,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 542 treesize of output 510 [2022-12-12 23:19:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-12 23:19:30,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131170059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:19:30,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:19:30,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2022-12-12 23:19:30,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133728425] [2022-12-12 23:19:30,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:19:30,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 23:19:30,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 23:19:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=403, Unknown=18, NotChecked=180, Total=702 [2022-12-12 23:19:30,502 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:19:30,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 16851 transitions, 811777 flow. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:19:30,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:30,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:19:30,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:22:53,419 INFO L130 PetriNetUnfolder]: 35094/51714 cut-off events. [2022-12-12 23:22:53,419 INFO L131 PetriNetUnfolder]: For 189684/189684 co-relation queries the response was YES. [2022-12-12 23:22:53,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280223 conditions, 51714 events. 35094/51714 cut-off events. For 189684/189684 co-relation queries the response was YES. Maximal size of possible extension queue 2601. Compared 371901 event pairs, 32 based on Foata normal form. 2/40451 useless extension candidates. Maximal degree in co-relation 1014614. Up to 51371 conditions per place. [2022-12-12 23:22:54,051 INFO L137 encePairwiseOnDemand]: 11/26 looper letters, 16028 selfloop transitions, 1572 changer transitions 6/17717 dead transitions. [2022-12-12 23:22:54,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 17717 transitions, 888701 flow [2022-12-12 23:22:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 23:22:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 23:22:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 172 transitions. [2022-12-12 23:22:54,053 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41346153846153844 [2022-12-12 23:22:54,053 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 434 predicate places. [2022-12-12 23:22:54,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 466 places, 17717 transitions, 888701 flow [2022-12-12 23:22:54,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 466 places, 17711 transitions, 888389 flow [2022-12-12 23:22:54,872 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 17711 transitions, 888389 flow [2022-12-12 23:22:54,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:22:54,872 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:22:54,872 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:22:54,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 23:22:55,072 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,SelfDestructingSolverStorable23 [2022-12-12 23:22:55,073 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:22:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:22:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1492548584, now seen corresponding path program 8 times [2022-12-12 23:22:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:22:55,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568198448] [2022-12-12 23:22:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:22:55,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:22:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:22:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:22:55,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:22:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568198448] [2022-12-12 23:22:55,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568198448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:22:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068071253] [2022-12-12 23:22:55,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:22:55,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:22:55,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:22:55,381 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) [2022-12-12 23:22:55,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 23:22:55,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:22:55,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:22:55,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 23:22:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:22:55,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:22:55,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:22:55,604 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 15 treesize of output 7 [2022-12-12 23:22:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:22:55,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:22:55,646 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1027 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1027) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))))) is different from false [2022-12-12 23:22:55,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:22:55,653 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 54 treesize of output 42 [2022-12-12 23:22:55,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-12-12 23:22:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:22:55,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068071253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:22:55,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:22:55,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-12 23:22:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049418832] [2022-12-12 23:22:55,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:22:55,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 23:22:55,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:22:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 23:22:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=335, Unknown=1, NotChecked=38, Total=462 [2022-12-12 23:22:55,725 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 23:22:55,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 17711 transitions, 888389 flow. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:22:55,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:22:55,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 23:22:55,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 23:25:43,128 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:25:43,140 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:25:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 23:25:43,174 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 23:25:43,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 23:25:43,379 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,SelfDestructingSolverStorable24 [2022-12-12 23:25:43,380 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 1/26 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 912149 conditions, 35624 events (25031/35623 cut-off events. For 211988/211988 co-relation queries the response was YES. Maximal size of possible extension queue 2701. Compared 249456 event pairs, 15 based on Foata normal form. 0/29254 useless extension candidates. Maximal degree in co-relation 691539. Up to 35296 conditions per place.). [2022-12-12 23:25:43,381 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 23:25:43,381 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 23:25:43,381 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 23:25:43,382 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 1, 1, 1, 1, 1] [2022-12-12 23:25:43,384 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:25:43,384 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:25:43,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:25:43 BasicIcfg [2022-12-12 23:25:43,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:25:43,386 INFO L158 Benchmark]: Toolchain (without parser) took 843688.64ms. Allocated memory was 204.5MB in the beginning and 2.3GB in the end (delta: 2.1GB). Free memory was 181.3MB in the beginning and 285.0MB in the end (delta: -103.7MB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. [2022-12-12 23:25:43,386 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 204.5MB. Free memory is still 180.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:25:43,386 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.11ms. Allocated memory is still 204.5MB. Free memory was 181.3MB in the beginning and 167.8MB in the end (delta: 13.5MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-12 23:25:43,386 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.22ms. Allocated memory is still 204.5MB. Free memory was 167.8MB in the beginning and 165.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:25:43,386 INFO L158 Benchmark]: Boogie Preprocessor took 42.28ms. Allocated memory is still 204.5MB. Free memory was 165.7MB in the beginning and 164.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 23:25:43,387 INFO L158 Benchmark]: RCFGBuilder took 583.66ms. Allocated memory is still 204.5MB. Free memory was 164.1MB in the beginning and 132.1MB in the end (delta: 32.0MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. [2022-12-12 23:25:43,387 INFO L158 Benchmark]: TraceAbstraction took 842771.87ms. Allocated memory was 204.5MB in the beginning and 2.3GB in the end (delta: 2.1GB). Free memory was 131.1MB in the beginning and 285.0MB in the end (delta: -153.9MB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. [2022-12-12 23:25:43,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 204.5MB. Free memory is still 180.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 236.11ms. Allocated memory is still 204.5MB. Free memory was 181.3MB in the beginning and 167.8MB in the end (delta: 13.5MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 49.22ms. Allocated memory is still 204.5MB. Free memory was 167.8MB in the beginning and 165.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.28ms. Allocated memory is still 204.5MB. Free memory was 165.7MB in the beginning and 164.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 583.66ms. Allocated memory is still 204.5MB. Free memory was 164.1MB in the beginning and 132.1MB in the end (delta: 32.0MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. * TraceAbstraction took 842771.87ms. Allocated memory was 204.5MB in the beginning and 2.3GB in the end (delta: 2.1GB). Free memory was 131.1MB in the beginning and 285.0MB in the end (delta: -153.9MB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.4s, 129 PlacesBefore, 32 PlacesAfterwards, 131 TransitionsBefore, 26 TransitionsAfterwards, 1518 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 66 TrivialYvCompositions, 31 ConcurrentYvCompositions, 8 ChoiceCompositions, 105 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 833, independent: 815, independent conditional: 815, independent unconditional: 0, dependent: 18, dependent conditional: 18, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 833, independent: 815, independent conditional: 0, independent unconditional: 815, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 833, independent: 815, independent conditional: 0, independent unconditional: 815, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 833, independent: 815, independent conditional: 0, independent unconditional: 815, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 785, independent: 775, independent conditional: 0, independent unconditional: 775, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 785, independent: 775, independent conditional: 0, independent unconditional: 775, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 26, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 833, independent: 40, independent conditional: 0, independent unconditional: 40, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 785, unknown conditional: 0, unknown unconditional: 785] , Statistics on independence cache: Total cache size (in pairs): 1250, Positive cache size: 1240, Positive conditional cache size: 0, Positive unconditional cache size: 1240, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 1/26 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 912149 conditions, 35624 events (25031/35623 cut-off events. For 211988/211988 co-relation queries the response was YES. Maximal size of possible extension queue 2701. Compared 249456 event pairs, 15 based on Foata normal form. 0/29254 useless extension candidates. Maximal degree in co-relation 691539. Up to 35296 conditions per place.). - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 1/26 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 912149 conditions, 35624 events (25031/35623 cut-off events. For 211988/211988 co-relation queries the response was YES. Maximal size of possible extension queue 2701. Compared 249456 event pairs, 15 based on Foata normal form. 0/29254 useless extension candidates. Maximal degree in co-relation 691539. Up to 35296 conditions per place.). - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 1/26 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 912149 conditions, 35624 events (25031/35623 cut-off events. For 211988/211988 co-relation queries the response was YES. Maximal size of possible extension queue 2701. Compared 249456 event pairs, 15 based on Foata normal form. 0/29254 useless extension candidates. Maximal degree in co-relation 691539. Up to 35296 conditions per place.). - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 1/26 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 912149 conditions, 35624 events (25031/35623 cut-off events. For 211988/211988 co-relation queries the response was YES. Maximal size of possible extension queue 2701. Compared 249456 event pairs, 15 based on Foata normal form. 0/29254 useless extension candidates. Maximal degree in co-relation 691539. Up to 35296 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 166 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 4.5s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 842.7s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 814.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 58 mSolverCounterUnknown, 4234 SdHoareTripleChecker+Valid, 9.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4234 mSDsluCounter, 816 SdHoareTripleChecker+Invalid, 8.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 666 IncrementalHoareTripleChecker+Unchecked, 696 mSDsCounter, 289 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19927 IncrementalHoareTripleChecker+Invalid, 20940 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 289 mSolverCounterUnsat, 120 mSDtfsCounter, 19927 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1477 GetRequests, 716 SyntacticMatches, 34 SemanticMatches, 727 ConstructedPredicates, 7 IntricatePredicates, 6 DeprecatedPredicates, 11864 ImplicationChecksByTransitivity, 12.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=888389occurred in iteration=24, InterpolantAutomatonStates: 483, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.5s AutomataMinimizationTime, 24 MinimizatonAttempts, 12425 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 1067 NumberOfCodeBlocks, 1067 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1491 ConstructedInterpolants, 29 QuantifiedInterpolants, 12876 SizeOfPredicates, 412 NumberOfNonLiveVariables, 5215 ConjunctsInSsa, 843 ConjunctsInUnsatCore, 67 InterpolantComputations, 10 PerfectInterpolantSequences, 56/171 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown