/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-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:39:00,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:39:00,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:39:00,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:39:00,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:39:00,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:39:00,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:39:00,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:39:00,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:39:00,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:39:00,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:39:00,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:39:00,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:39:00,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:39:00,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:39:00,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:39:00,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:39:00,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:39:00,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:39:00,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:39:00,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:39:00,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:39:00,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:39:00,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:39:00,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:39:00,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:39:00,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:39:00,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:39:00,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:39:00,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:39:00,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:39:00,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:39:00,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:39:00,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:39:00,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:39:00,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:39:00,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:39:00,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:39:00,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:39:00,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:39:00,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:39:00,147 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 23:39:00,173 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:39:00,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:39:00,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:39:00,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:39:00,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:39:00,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:39:00,176 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:39:00,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:39:00,176 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:39:00,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:39:00,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:39:00,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:39:00,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:39:00,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:39:00,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:39:00,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:39:00,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:39:00,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:39:00,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:39:00,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:39:00,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:39:00,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:39:00,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:39:00,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:39:00,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:39:00,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:39:00,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:39:00,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:39:00,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:39:00,180 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:39:00,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:39:00,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:39:00,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:39:00,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:39:00,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:39:00,526 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:39:00,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2022-12-12 23:39:01,566 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:39:01,783 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:39:01,783 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2022-12-12 23:39:01,791 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4c38d26/1383860514dd454a82417f43b039c6ae/FLAG7f276b4d1 [2022-12-12 23:39:01,816 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4c38d26/1383860514dd454a82417f43b039c6ae [2022-12-12 23:39:01,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:39:01,820 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:39:01,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:39:01,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:39:01,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:39:01,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:39:01" (1/1) ... [2022-12-12 23:39:01,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420ea5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:01, skipping insertion in model container [2022-12-12 23:39:01,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:39:01" (1/1) ... [2022-12-12 23:39:01,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:39:01,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:39:02,007 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:39:02,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:39:02,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:39:02,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:39:02,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:39:02,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:39:02,032 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-queue-add-2.wvr.c[2696,2709] [2022-12-12 23:39:02,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:39:02,051 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:39:02,068 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:39:02,069 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:39:02,069 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:39:02,070 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:39:02,070 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:39:02,071 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:39:02,074 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-queue-add-2.wvr.c[2696,2709] [2022-12-12 23:39:02,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:39:02,089 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:39:02,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02 WrapperNode [2022-12-12 23:39:02,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:39:02,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:39:02,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:39:02,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:39:02,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,135 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-12-12 23:39:02,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:39:02,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:39:02,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:39:02,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:39:02,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:39:02,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:39:02,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:39:02,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:39:02,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (1/1) ... [2022-12-12 23:39:02,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:39:02,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:02,205 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 23:39:02,215 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 23:39:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:39:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:39:02,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:39:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:39:02,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:39:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:39:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:39:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:39:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 23:39:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 23:39:02,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 23:39:02,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:39:02,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:39:02,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:39:02,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:39:02,249 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 23:39:02,361 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:39:02,363 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:39:02,712 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:39:02,808 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:39:02,808 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 23:39:02,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:39:02 BoogieIcfgContainer [2022-12-12 23:39:02,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:39:02,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:39:02,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:39:02,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:39:02,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:39:01" (1/3) ... [2022-12-12 23:39:02,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c133dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:39:02, skipping insertion in model container [2022-12-12 23:39:02,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:39:02" (2/3) ... [2022-12-12 23:39:02,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c133dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:39:02, skipping insertion in model container [2022-12-12 23:39:02,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:39:02" (3/3) ... [2022-12-12 23:39:02,817 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-12-12 23:39:02,839 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:39:02,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:39:02,839 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:39:02,912 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 23:39:02,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 124 transitions, 264 flow [2022-12-12 23:39:03,045 INFO L130 PetriNetUnfolder]: 11/122 cut-off events. [2022-12-12 23:39:03,045 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:39:03,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 122 events. 11/122 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 89. Up to 3 conditions per place. [2022-12-12 23:39:03,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 124 transitions, 264 flow [2022-12-12 23:39:03,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 114 transitions, 240 flow [2022-12-12 23:39:03,058 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:39:03,077 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 114 transitions, 240 flow [2022-12-12 23:39:03,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 114 transitions, 240 flow [2022-12-12 23:39:03,125 INFO L130 PetriNetUnfolder]: 11/114 cut-off events. [2022-12-12 23:39:03,126 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:39:03,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 11/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 89. Up to 3 conditions per place. [2022-12-12 23:39:03,129 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 114 transitions, 240 flow [2022-12-12 23:39:03,129 INFO L226 LiptonReduction]: Number of co-enabled transitions 538 [2022-12-12 23:39:07,598 INFO L241 LiptonReduction]: Total number of compositions: 96 [2022-12-12 23:39:07,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:39:07,626 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;@83c2e54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:39:07,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 23:39:07,643 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-12 23:39:07,643 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:39:07,643 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:07,644 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:07,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:07,648 INFO L85 PathProgramCache]: Analyzing trace with hash 82611840, now seen corresponding path program 1 times [2022-12-12 23:39:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103772903] [2022-12-12 23:39:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:07,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:08,121 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 23:39:08,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:08,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103772903] [2022-12-12 23:39:08,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103772903] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:39:08,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:39:08,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 23:39:08,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063986351] [2022-12-12 23:39:08,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:39:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:39:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:08,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:39:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:39:08,154 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:08,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 23:39:08,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:08,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:08,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:08,237 INFO L130 PetriNetUnfolder]: 45/87 cut-off events. [2022-12-12 23:39:08,237 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 23:39:08,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 87 events. 45/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 18 based on Foata normal form. 6/65 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-12-12 23:39:08,239 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 14 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2022-12-12 23:39:08,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2022-12-12 23:39:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:39:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:39:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2022-12-12 23:39:08,249 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2022-12-12 23:39:08,251 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2022-12-12 23:39:08,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 23 transitions, 106 flow [2022-12-12 23:39:08,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 80 flow [2022-12-12 23:39:08,253 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 80 flow [2022-12-12 23:39:08,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 23:39:08,254 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:08,254 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:08,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:39:08,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:08,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1320804175, now seen corresponding path program 1 times [2022-12-12 23:39:08,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:08,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150582764] [2022-12-12 23:39:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:39:08,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:08,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150582764] [2022-12-12 23:39:08,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150582764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:39:08,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:39:08,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:39:08,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276396544] [2022-12-12 23:39:08,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:39:08,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:39:08,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:39:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-12 23:39:08,689 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:39:08,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 23:39:08,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:08,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:39:08,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:08,819 INFO L130 PetriNetUnfolder]: 72/136 cut-off events. [2022-12-12 23:39:08,819 INFO L131 PetriNetUnfolder]: For 28/37 co-relation queries the response was YES. [2022-12-12 23:39:08,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 136 events. 72/136 cut-off events. For 28/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 409 event pairs, 15 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 302. Up to 124 conditions per place. [2022-12-12 23:39:08,823 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 32 selfloop transitions, 8 changer transitions 2/43 dead transitions. [2022-12-12 23:39:08,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 280 flow [2022-12-12 23:39:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:39:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:39:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 48 transitions. [2022-12-12 23:39:08,826 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2022-12-12 23:39:08,827 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2022-12-12 23:39:08,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 43 transitions, 280 flow [2022-12-12 23:39:08,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 41 transitions, 265 flow [2022-12-12 23:39:08,829 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 41 transitions, 265 flow [2022-12-12 23:39:08,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 23:39:08,829 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:08,830 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:08,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 23:39:08,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2102829141, now seen corresponding path program 1 times [2022-12-12 23:39:08,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:08,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898426247] [2022-12-12 23:39:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:08,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:08,964 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 23:39:08,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898426247] [2022-12-12 23:39:08,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898426247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:39:08,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:39:08,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:39:08,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911356379] [2022-12-12 23:39:08,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:39:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:39:08,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:39:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:39:08,970 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:08,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 41 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 23:39:08,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:08,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:08,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:09,055 INFO L130 PetriNetUnfolder]: 87/179 cut-off events. [2022-12-12 23:39:09,055 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-12 23:39:09,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 179 events. 87/179 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 604 event pairs, 3 based on Foata normal form. 10/138 useless extension candidates. Maximal degree in co-relation 555. Up to 174 conditions per place. [2022-12-12 23:39:09,058 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 47 selfloop transitions, 14 changer transitions 7/70 dead transitions. [2022-12-12 23:39:09,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 70 transitions, 601 flow [2022-12-12 23:39:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:39:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:39:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2022-12-12 23:39:09,060 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2022-12-12 23:39:09,061 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-12-12 23:39:09,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 70 transitions, 601 flow [2022-12-12 23:39:09,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 63 transitions, 539 flow [2022-12-12 23:39:09,064 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 63 transitions, 539 flow [2022-12-12 23:39:09,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 23:39:09,065 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:09,065 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:09,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 23:39:09,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash 613735374, now seen corresponding path program 1 times [2022-12-12 23:39:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:09,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898718173] [2022-12-12 23:39:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:09,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898718173] [2022-12-12 23:39:09,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898718173] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029056311] [2022-12-12 23:39:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:09,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:09,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:09,235 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 23:39:09,262 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 23:39:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:39:09,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:09,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:09,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029056311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:09,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:09,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-12 23:39:09,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953905970] [2022-12-12 23:39:09,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:09,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:39:09,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:39:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:39:09,577 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:09,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 63 transitions, 539 flow. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:39:09,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:09,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:09,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:09,749 INFO L130 PetriNetUnfolder]: 88/193 cut-off events. [2022-12-12 23:39:09,749 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-12-12 23:39:09,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 193 events. 88/193 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 657 event pairs, 3 based on Foata normal form. 8/151 useless extension candidates. Maximal degree in co-relation 644. Up to 183 conditions per place. [2022-12-12 23:39:09,751 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 59 selfloop transitions, 3 changer transitions 16/80 dead transitions. [2022-12-12 23:39:09,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 80 transitions, 843 flow [2022-12-12 23:39:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:39:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:39:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-12-12 23:39:09,753 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 23:39:09,753 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2022-12-12 23:39:09,753 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 80 transitions, 843 flow [2022-12-12 23:39:09,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 64 transitions, 671 flow [2022-12-12 23:39:09,755 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 64 transitions, 671 flow [2022-12-12 23:39:09,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:39:09,756 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:09,756 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:09,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 23:39:09,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:09,966 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:09,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1653226545, now seen corresponding path program 2 times [2022-12-12 23:39:09,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:09,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48509533] [2022-12-12 23:39:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:10,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:10,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48509533] [2022-12-12 23:39:10,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48509533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220231497] [2022-12-12 23:39:10,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:39:10,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:10,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:10,551 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 23:39:10,556 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 23:39:10,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:39:10,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:10,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-12 23:39:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:10,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:11,026 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-12 23:39:11,027 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 25 treesize of output 16 [2022-12-12 23:39:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:11,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220231497] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:11,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:11,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 23:39:11,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378514170] [2022-12-12 23:39:11,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:11,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 23:39:11,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:11,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 23:39:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-12-12 23:39:11,210 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:11,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 64 transitions, 671 flow. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 23:39:11,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:11,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:11,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:11,929 INFO L130 PetriNetUnfolder]: 274/545 cut-off events. [2022-12-12 23:39:11,930 INFO L131 PetriNetUnfolder]: For 241/241 co-relation queries the response was YES. [2022-12-12 23:39:11,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 545 events. 274/545 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2559 event pairs, 4 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 1848. Up to 530 conditions per place. [2022-12-12 23:39:11,937 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 167 selfloop transitions, 66 changer transitions 1/236 dead transitions. [2022-12-12 23:39:11,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 236 transitions, 2964 flow [2022-12-12 23:39:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 23:39:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 23:39:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 135 transitions. [2022-12-12 23:39:11,939 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4671280276816609 [2022-12-12 23:39:11,940 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2022-12-12 23:39:11,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 236 transitions, 2964 flow [2022-12-12 23:39:11,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 235 transitions, 2952 flow [2022-12-12 23:39:11,946 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 235 transitions, 2952 flow [2022-12-12 23:39:11,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 23:39:11,947 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:11,947 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:11,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 23:39:12,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:12,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash 56286041, now seen corresponding path program 3 times [2022-12-12 23:39:12,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:12,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725831938] [2022-12-12 23:39:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:12,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:12,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725831938] [2022-12-12 23:39:12,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725831938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420982074] [2022-12-12 23:39:12,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:39:12,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:12,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:12,712 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 23:39:12,721 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 23:39:12,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:39:12,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:12,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-12 23:39:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:12,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:39:12,981 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 18 treesize of output 20 [2022-12-12 23:39:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:13,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:13,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:13,165 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 45 treesize of output 41 [2022-12-12 23:39:13,170 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 24 treesize of output 18 [2022-12-12 23:39:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:13,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420982074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:13,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:13,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-12-12 23:39:13,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212518194] [2022-12-12 23:39:13,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:13,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 23:39:13,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:13,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 23:39:13,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-12-12 23:39:13,371 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:13,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 235 transitions, 2952 flow. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 23:39:13,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:13,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:13,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:14,500 INFO L130 PetriNetUnfolder]: 432/866 cut-off events. [2022-12-12 23:39:14,500 INFO L131 PetriNetUnfolder]: For 510/510 co-relation queries the response was YES. [2022-12-12 23:39:14,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6077 conditions, 866 events. 432/866 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4532 event pairs, 10 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 2597. Up to 842 conditions per place. [2022-12-12 23:39:14,508 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 298 selfloop transitions, 69 changer transitions 0/369 dead transitions. [2022-12-12 23:39:14,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 369 transitions, 5381 flow [2022-12-12 23:39:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 23:39:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 23:39:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2022-12-12 23:39:14,510 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.44982698961937717 [2022-12-12 23:39:14,511 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 44 predicate places. [2022-12-12 23:39:14,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 369 transitions, 5381 flow [2022-12-12 23:39:14,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 369 transitions, 5381 flow [2022-12-12 23:39:14,521 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 369 transitions, 5381 flow [2022-12-12 23:39:14,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 23:39:14,521 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:14,521 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:14,534 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 23:39:14,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:14,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:14,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1128544143, now seen corresponding path program 1 times [2022-12-12 23:39:14,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:14,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095032243] [2022-12-12 23:39:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:14,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:15,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095032243] [2022-12-12 23:39:15,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095032243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:15,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572008574] [2022-12-12 23:39:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:15,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:15,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:15,437 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 23:39:15,440 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 23:39:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 23:39:15,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:15,825 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 25 treesize of output 7 [2022-12-12 23:39:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:15,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:16,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:16,008 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 53 treesize of output 33 [2022-12-12 23:39:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:16,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572008574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:16,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:16,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2022-12-12 23:39:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471992439] [2022-12-12 23:39:16,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:16,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 23:39:16,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 23:39:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-12-12 23:39:16,297 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:39:16,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 369 transitions, 5381 flow. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 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 23:39:16,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:16,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:39:16,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:17,438 INFO L130 PetriNetUnfolder]: 568/1161 cut-off events. [2022-12-12 23:39:17,438 INFO L131 PetriNetUnfolder]: For 641/641 co-relation queries the response was YES. [2022-12-12 23:39:17,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9354 conditions, 1161 events. 568/1161 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6827 event pairs, 8 based on Foata normal form. 5/890 useless extension candidates. Maximal degree in co-relation 4198. Up to 1137 conditions per place. [2022-12-12 23:39:17,449 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 414 selfloop transitions, 83 changer transitions 11/509 dead transitions. [2022-12-12 23:39:17,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 509 transitions, 8467 flow [2022-12-12 23:39:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 23:39:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 23:39:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 139 transitions. [2022-12-12 23:39:17,452 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4088235294117647 [2022-12-12 23:39:17,453 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2022-12-12 23:39:17,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 509 transitions, 8467 flow [2022-12-12 23:39:17,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 498 transitions, 8276 flow [2022-12-12 23:39:17,470 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 498 transitions, 8276 flow [2022-12-12 23:39:17,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 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 23:39:17,471 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:17,471 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:17,482 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 23:39:17,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:17,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash 388332427, now seen corresponding path program 2 times [2022-12-12 23:39:17,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:17,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475353561] [2022-12-12 23:39:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:17,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475353561] [2022-12-12 23:39:18,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475353561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298868805] [2022-12-12 23:39:18,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:39:18,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:18,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:18,222 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 23:39:18,246 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 23:39:18,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:39:18,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 23:39:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:18,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 23:39:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:18,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:18,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:18,676 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 42 treesize of output 30 [2022-12-12 23:39:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:18,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298868805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:18,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:18,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-12-12 23:39:18,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379281800] [2022-12-12 23:39:18,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:18,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 23:39:18,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 23:39:18,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-12-12 23:39:18,894 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:39:18,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 498 transitions, 8276 flow. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 23:39:18,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:18,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:39:18,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:20,227 INFO L130 PetriNetUnfolder]: 694/1418 cut-off events. [2022-12-12 23:39:20,228 INFO L131 PetriNetUnfolder]: For 785/785 co-relation queries the response was YES. [2022-12-12 23:39:20,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 1418 events. 694/1418 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8810 event pairs, 8 based on Foata normal form. 9/1097 useless extension candidates. Maximal degree in co-relation 6091. Up to 1393 conditions per place. [2022-12-12 23:39:20,241 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 482 selfloop transitions, 112 changer transitions 58/653 dead transitions. [2022-12-12 23:39:20,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 653 transitions, 12174 flow [2022-12-12 23:39:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 23:39:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 23:39:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 170 transitions. [2022-12-12 23:39:20,243 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2022-12-12 23:39:20,244 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2022-12-12 23:39:20,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 653 transitions, 12174 flow [2022-12-12 23:39:20,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 595 transitions, 11070 flow [2022-12-12 23:39:20,258 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 595 transitions, 11070 flow [2022-12-12 23:39:20,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 23:39:20,259 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:20,259 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:20,267 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 23:39:20,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:20,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:20,465 INFO L85 PathProgramCache]: Analyzing trace with hash -180100353, now seen corresponding path program 3 times [2022-12-12 23:39:20,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:20,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773213872] [2022-12-12 23:39:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:20,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:21,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773213872] [2022-12-12 23:39:21,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773213872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174074917] [2022-12-12 23:39:21,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:39:21,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:21,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:21,078 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 23:39:21,103 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 23:39:21,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:39:21,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:21,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 23:39:21,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:39:21,355 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 18 treesize of output 20 [2022-12-12 23:39:21,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 23:39:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:39:21,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:21,529 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_245 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_245) c_~q~0.base) .cse0)))) (forall ((v_ArrVal_245 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_245) c_~q~0.base) .cse0)) (+ c_~N~0 1))))) is different from false [2022-12-12 23:39:21,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:21,603 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 86 treesize of output 74 [2022-12-12 23:39:21,611 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 57 treesize of output 51 [2022-12-12 23:39:21,615 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 51 treesize of output 45 [2022-12-12 23:39:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:39:21,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174074917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:21,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:21,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2022-12-12 23:39:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103271352] [2022-12-12 23:39:21,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:21,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 23:39:21,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 23:39:21,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=530, Unknown=1, NotChecked=46, Total=650 [2022-12-12 23:39:21,763 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:39:21,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 595 transitions, 11070 flow. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 23:39:21,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:21,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:39:21,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:22,718 INFO L130 PetriNetUnfolder]: 660/1330 cut-off events. [2022-12-12 23:39:22,719 INFO L131 PetriNetUnfolder]: For 891/891 co-relation queries the response was YES. [2022-12-12 23:39:22,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13348 conditions, 1330 events. 660/1330 cut-off events. For 891/891 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8038 event pairs, 8 based on Foata normal form. 3/1045 useless extension candidates. Maximal degree in co-relation 6663. Up to 1304 conditions per place. [2022-12-12 23:39:22,731 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 549 selfloop transitions, 41 changer transitions 9/600 dead transitions. [2022-12-12 23:39:22,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 600 transitions, 12382 flow [2022-12-12 23:39:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 23:39:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 23:39:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 91 transitions. [2022-12-12 23:39:22,732 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3568627450980392 [2022-12-12 23:39:22,733 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2022-12-12 23:39:22,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 600 transitions, 12382 flow [2022-12-12 23:39:22,747 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 591 transitions, 12190 flow [2022-12-12 23:39:22,747 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 591 transitions, 12190 flow [2022-12-12 23:39:22,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 23:39:22,748 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:22,748 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:22,757 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 23:39:22,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:22,954 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash -388726549, now seen corresponding path program 4 times [2022-12-12 23:39:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714978279] [2022-12-12 23:39:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:23,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:23,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714978279] [2022-12-12 23:39:23,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714978279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534853621] [2022-12-12 23:39:23,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:39:23,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:23,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:23,610 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 23:39:23,613 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 23:39:23,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:39:23,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 23:39:23,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:23,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:39:23,931 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 19 treesize of output 21 [2022-12-12 23:39:24,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 23:39:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:24,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:24,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:24,328 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 86 treesize of output 74 [2022-12-12 23:39:24,334 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 57 treesize of output 51 [2022-12-12 23:39:24,338 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 51 treesize of output 45 [2022-12-12 23:39:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:24,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534853621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:24,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:24,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-12-12 23:39:24,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658781780] [2022-12-12 23:39:24,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 23:39:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 23:39:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=691, Unknown=2, NotChecked=0, Total=812 [2022-12-12 23:39:24,593 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:39:24,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 591 transitions, 12190 flow. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 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 23:39:24,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:24,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:39:24,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:29,330 INFO L130 PetriNetUnfolder]: 905/1839 cut-off events. [2022-12-12 23:39:29,330 INFO L131 PetriNetUnfolder]: For 1317/1317 co-relation queries the response was YES. [2022-12-12 23:39:29,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20282 conditions, 1839 events. 905/1839 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 12127 event pairs, 8 based on Foata normal form. 7/1432 useless extension candidates. Maximal degree in co-relation 10571. Up to 1808 conditions per place. [2022-12-12 23:39:29,349 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 610 selfloop transitions, 181 changer transitions 32/824 dead transitions. [2022-12-12 23:39:29,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 824 transitions, 18648 flow [2022-12-12 23:39:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 23:39:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 23:39:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 191 transitions. [2022-12-12 23:39:29,351 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37450980392156863 [2022-12-12 23:39:29,351 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2022-12-12 23:39:29,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 824 transitions, 18648 flow [2022-12-12 23:39:29,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 792 transitions, 17908 flow [2022-12-12 23:39:29,374 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 792 transitions, 17908 flow [2022-12-12 23:39:29,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 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 23:39:29,374 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:29,375 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:29,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 23:39:29,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:29,581 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:29,581 INFO L85 PathProgramCache]: Analyzing trace with hash 623417457, now seen corresponding path program 5 times [2022-12-12 23:39:29,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:29,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173420117] [2022-12-12 23:39:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:29,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:39:29,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173420117] [2022-12-12 23:39:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173420117] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113491478] [2022-12-12 23:39:29,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:39:29,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:29,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:29,707 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 23:39:29,710 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 23:39:29,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:39:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:29,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-12 23:39:29,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:29,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:30,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113491478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:30,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:30,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2022-12-12 23:39:30,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826181857] [2022-12-12 23:39:30,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:30,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 23:39:30,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 23:39:30,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-12-12 23:39:30,100 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:30,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 792 transitions, 17908 flow. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 23:39:30,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:30,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:30,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:30,849 INFO L130 PetriNetUnfolder]: 632/1372 cut-off events. [2022-12-12 23:39:30,849 INFO L131 PetriNetUnfolder]: For 1403/1403 co-relation queries the response was YES. [2022-12-12 23:39:30,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 1372 events. 632/1372 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9116 event pairs, 6 based on Foata normal form. 134/1233 useless extension candidates. Maximal degree in co-relation 6699. Up to 1343 conditions per place. [2022-12-12 23:39:30,858 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 285 selfloop transitions, 76 changer transitions 297/662 dead transitions. [2022-12-12 23:39:30,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 662 transitions, 16292 flow [2022-12-12 23:39:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 23:39:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 23:39:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 117 transitions. [2022-12-12 23:39:30,859 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.49159663865546216 [2022-12-12 23:39:30,860 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2022-12-12 23:39:30,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 662 transitions, 16292 flow [2022-12-12 23:39:30,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 365 transitions, 8990 flow [2022-12-12 23:39:30,870 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 365 transitions, 8990 flow [2022-12-12 23:39:30,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 23:39:30,870 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:30,871 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:30,878 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 23:39:31,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-12 23:39:31,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1560943506, now seen corresponding path program 6 times [2022-12-12 23:39:31,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:31,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284902230] [2022-12-12 23:39:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:31,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:39:31,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284902230] [2022-12-12 23:39:31,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284902230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:31,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178573419] [2022-12-12 23:39:31,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:39:31,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:31,196 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 23:39:31,216 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 23:39:31,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:39:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 23:39:31,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:39:31,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:39:31,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178573419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:31,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:31,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-12 23:39:31,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425391894] [2022-12-12 23:39:31,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:31,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 23:39:31,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 23:39:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-12-12 23:39:31,436 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:31,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 365 transitions, 8990 flow. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 23:39:31,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:31,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:31,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:31,657 INFO L130 PetriNetUnfolder]: 244/514 cut-off events. [2022-12-12 23:39:31,658 INFO L131 PetriNetUnfolder]: For 922/922 co-relation queries the response was YES. [2022-12-12 23:39:31,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6592 conditions, 514 events. 244/514 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2350 event pairs, 6 based on Foata normal form. 10/407 useless extension candidates. Maximal degree in co-relation 3227. Up to 492 conditions per place. [2022-12-12 23:39:31,662 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 186 selfloop transitions, 4 changer transitions 24/217 dead transitions. [2022-12-12 23:39:31,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 217 transitions, 5732 flow [2022-12-12 23:39:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:39:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:39:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 49 transitions. [2022-12-12 23:39:31,663 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3602941176470588 [2022-12-12 23:39:31,664 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2022-12-12 23:39:31,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 217 transitions, 5732 flow [2022-12-12 23:39:31,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 193 transitions, 5098 flow [2022-12-12 23:39:31,670 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 193 transitions, 5098 flow [2022-12-12 23:39:31,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 23:39:31,670 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:31,670 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:31,678 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 23:39:31,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:31,877 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash -814729141, now seen corresponding path program 4 times [2022-12-12 23:39:31,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:31,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306483252] [2022-12-12 23:39:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:32,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:32,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306483252] [2022-12-12 23:39:32,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306483252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:32,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783186585] [2022-12-12 23:39:32,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:39:32,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:32,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:32,465 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 23:39:32,484 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 23:39:32,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:39:32,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 23:39:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:39:32,804 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 18 treesize of output 20 [2022-12-12 23:39:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:32,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:33,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:33,017 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 45 treesize of output 41 [2022-12-12 23:39:33,020 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 24 treesize of output 18 [2022-12-12 23:39:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:33,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783186585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:33,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:33,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 27 [2022-12-12 23:39:33,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988016886] [2022-12-12 23:39:33,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:33,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 23:39:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 23:39:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-12-12 23:39:33,265 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:33,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 193 transitions, 5098 flow. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 23:39:33,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:33,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:33,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:35,104 INFO L130 PetriNetUnfolder]: 473/961 cut-off events. [2022-12-12 23:39:35,105 INFO L131 PetriNetUnfolder]: For 1983/1983 co-relation queries the response was YES. [2022-12-12 23:39:35,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13304 conditions, 961 events. 473/961 cut-off events. For 1983/1983 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5316 event pairs, 2 based on Foata normal form. 32/761 useless extension candidates. Maximal degree in co-relation 4252. Up to 929 conditions per place. [2022-12-12 23:39:35,112 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 308 selfloop transitions, 92 changer transitions 9/412 dead transitions. [2022-12-12 23:39:35,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 412 transitions, 11757 flow [2022-12-12 23:39:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 23:39:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 23:39:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 194 transitions. [2022-12-12 23:39:35,115 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43891402714932126 [2022-12-12 23:39:35,115 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 99 predicate places. [2022-12-12 23:39:35,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 412 transitions, 11757 flow [2022-12-12 23:39:35,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 403 transitions, 11505 flow [2022-12-12 23:39:35,126 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 403 transitions, 11505 flow [2022-12-12 23:39:35,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 23:39:35,126 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:35,126 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:35,137 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 23:39:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 23:39:35,333 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash -478913345, now seen corresponding path program 7 times [2022-12-12 23:39:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:35,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237259927] [2022-12-12 23:39:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:35,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:35,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:35,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237259927] [2022-12-12 23:39:35,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237259927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:35,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780570994] [2022-12-12 23:39:35,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:39:35,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:35,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:35,875 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 23:39:35,878 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 23:39:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:35,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 23:39:35,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:36,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:36,334 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-12 23:39:36,335 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 26 treesize of output 18 [2022-12-12 23:39:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:36,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780570994] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:36,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:36,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-12-12 23:39:36,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589776366] [2022-12-12 23:39:36,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:36,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 23:39:36,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:36,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 23:39:36,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-12-12 23:39:36,584 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:39:36,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 403 transitions, 11505 flow. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 23:39:36,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:36,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:39:36,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:39,359 INFO L130 PetriNetUnfolder]: 929/1837 cut-off events. [2022-12-12 23:39:39,359 INFO L131 PetriNetUnfolder]: For 2469/2469 co-relation queries the response was YES. [2022-12-12 23:39:39,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27451 conditions, 1837 events. 929/1837 cut-off events. For 2469/2469 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11396 event pairs, 0 based on Foata normal form. 4/1373 useless extension candidates. Maximal degree in co-relation 11349. Up to 1803 conditions per place. [2022-12-12 23:39:39,376 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 548 selfloop transitions, 306 changer transitions 17/872 dead transitions. [2022-12-12 23:39:39,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 872 transitions, 26596 flow [2022-12-12 23:39:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-12 23:39:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-12 23:39:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 371 transitions. [2022-12-12 23:39:39,378 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3897058823529412 [2022-12-12 23:39:39,379 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2022-12-12 23:39:39,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 872 transitions, 26596 flow [2022-12-12 23:39:39,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 855 transitions, 26086 flow [2022-12-12 23:39:39,402 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 855 transitions, 26086 flow [2022-12-12 23:39:39,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 23:39:39,403 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:39,403 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:39,411 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 23:39:39,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 23:39:39,609 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash 842075953, now seen corresponding path program 8 times [2022-12-12 23:39:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:39,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027730375] [2022-12-12 23:39:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:39,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:40,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027730375] [2022-12-12 23:39:40,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027730375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36959057] [2022-12-12 23:39:40,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:39:40,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:40,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:40,140 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 23:39:40,142 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 23:39:40,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:39:40,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:40,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-12 23:39:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:39:40,524 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 18 treesize of output 20 [2022-12-12 23:39:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:40,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:40,701 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_464 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_464) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2022-12-12 23:39:40,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:40,756 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 47 treesize of output 44 [2022-12-12 23:39:40,759 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 25 treesize of output 18 [2022-12-12 23:39:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:41,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36959057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:41,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:41,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-12 23:39:41,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677758398] [2022-12-12 23:39:41,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:41,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 23:39:41,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 23:39:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=798, Unknown=1, NotChecked=58, Total=992 [2022-12-12 23:39:41,126 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:41,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 855 transitions, 26086 flow. Second operand has 32 states, 32 states have (on average 3.5625) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 23:39:41,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:41,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:41,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:44,193 INFO L130 PetriNetUnfolder]: 1630/3179 cut-off events. [2022-12-12 23:39:44,193 INFO L131 PetriNetUnfolder]: For 3086/3086 co-relation queries the response was YES. [2022-12-12 23:39:44,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50870 conditions, 3179 events. 1630/3179 cut-off events. For 3086/3086 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21258 event pairs, 0 based on Foata normal form. 0/2376 useless extension candidates. Maximal degree in co-relation 27878. Up to 3145 conditions per place. [2022-12-12 23:39:44,217 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 980 selfloop transitions, 466 changer transitions 1/1452 dead transitions. [2022-12-12 23:39:44,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 1452 transitions, 47190 flow [2022-12-12 23:39:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-12 23:39:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-12 23:39:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 224 transitions. [2022-12-12 23:39:44,219 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2022-12-12 23:39:44,219 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2022-12-12 23:39:44,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 1452 transitions, 47190 flow [2022-12-12 23:39:44,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 1451 transitions, 47158 flow [2022-12-12 23:39:44,259 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 1451 transitions, 47158 flow [2022-12-12 23:39:44,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5625) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 23:39:44,260 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:44,260 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:44,266 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 23:39:44,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 23:39:44,466 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash 764568597, now seen corresponding path program 9 times [2022-12-12 23:39:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:44,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208530123] [2022-12-12 23:39:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:44,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:45,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208530123] [2022-12-12 23:39:45,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208530123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48721769] [2022-12-12 23:39:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:39:45,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:45,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:45,077 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 23:39:45,080 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 23:39:45,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 23:39:45,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:45,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 23:39:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:45,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:39:45,397 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 18 treesize of output 20 [2022-12-12 23:39:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:39:45,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:45,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:45,639 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 45 treesize of output 41 [2022-12-12 23:39:45,644 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 24 treesize of output 18 [2022-12-12 23:39:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:39:45,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48721769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:45,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:45,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2022-12-12 23:39:45,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087540564] [2022-12-12 23:39:45,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:45,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 23:39:45,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:45,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 23:39:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-12-12 23:39:45,823 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:39:45,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 1451 transitions, 47158 flow. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 23:39:45,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:45,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:39:45,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:50,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:39:52,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:39:53,734 INFO L130 PetriNetUnfolder]: 1243/2298 cut-off events. [2022-12-12 23:39:53,734 INFO L131 PetriNetUnfolder]: For 3809/3809 co-relation queries the response was YES. [2022-12-12 23:39:53,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38901 conditions, 2298 events. 1243/2298 cut-off events. For 3809/3809 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13635 event pairs, 1 based on Foata normal form. 18/1832 useless extension candidates. Maximal degree in co-relation 20367. Up to 2261 conditions per place. [2022-12-12 23:39:53,750 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 921 selfloop transitions, 316 changer transitions 25/1267 dead transitions. [2022-12-12 23:39:53,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1267 transitions, 43626 flow [2022-12-12 23:39:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 23:39:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 23:39:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 158 transitions. [2022-12-12 23:39:53,751 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42245989304812837 [2022-12-12 23:39:53,752 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 198 predicate places. [2022-12-12 23:39:53,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 1267 transitions, 43626 flow [2022-12-12 23:39:53,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 1242 transitions, 42776 flow [2022-12-12 23:39:53,777 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 1242 transitions, 42776 flow [2022-12-12 23:39:53,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 23:39:53,777 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:53,777 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:53,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 23:39:53,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 23:39:53,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2041416076, now seen corresponding path program 5 times [2022-12-12 23:39:53,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:53,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31648365] [2022-12-12 23:39:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:54,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31648365] [2022-12-12 23:39:54,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31648365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961298114] [2022-12-12 23:39:54,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:39:54,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:54,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:54,839 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 23:39:54,842 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 23:39:54,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:39:54,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:54,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 23:39:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:55,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:39:55,124 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 18 treesize of output 20 [2022-12-12 23:39:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:39:55,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:55,186 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_546 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_546) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2022-12-12 23:39:55,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:39:55,205 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 45 treesize of output 41 [2022-12-12 23:39:55,208 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 24 treesize of output 18 [2022-12-12 23:39:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 2 not checked. [2022-12-12 23:39:55,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961298114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:55,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:55,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 5] total 24 [2022-12-12 23:39:55,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068415769] [2022-12-12 23:39:55,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:55,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 23:39:55,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 23:39:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=470, Unknown=1, NotChecked=44, Total=600 [2022-12-12 23:39:55,289 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:39:55,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 1242 transitions, 42776 flow. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 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 23:39:55,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:55,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:39:55,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:39:56,794 INFO L130 PetriNetUnfolder]: 1328/2413 cut-off events. [2022-12-12 23:39:56,795 INFO L131 PetriNetUnfolder]: For 5108/5108 co-relation queries the response was YES. [2022-12-12 23:39:56,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43144 conditions, 2413 events. 1328/2413 cut-off events. For 5108/5108 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14006 event pairs, 0 based on Foata normal form. 0/1937 useless extension candidates. Maximal degree in co-relation 21255. Up to 2366 conditions per place. [2022-12-12 23:39:56,813 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 1196 selfloop transitions, 138 changer transitions 0/1335 dead transitions. [2022-12-12 23:39:56,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 1335 transitions, 48646 flow [2022-12-12 23:39:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 23:39:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 23:39:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 92 transitions. [2022-12-12 23:39:56,815 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31833910034602075 [2022-12-12 23:39:56,815 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2022-12-12 23:39:56,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 1335 transitions, 48646 flow [2022-12-12 23:39:56,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 1335 transitions, 48646 flow [2022-12-12 23:39:56,846 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 1335 transitions, 48646 flow [2022-12-12 23:39:56,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 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 23:39:56,846 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:39:56,846 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:39:56,852 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 23:39:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:57,052 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:39:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:39:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1963124415, now seen corresponding path program 10 times [2022-12-12 23:39:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:39:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703342780] [2022-12-12 23:39:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:39:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:39:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:39:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:57,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:39:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703342780] [2022-12-12 23:39:57,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703342780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:39:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657638372] [2022-12-12 23:39:57,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:39:57,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:39:57,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:39:57,804 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 23:39:57,827 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 23:39:57,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:39:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:39:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 23:39:57,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:39:58,412 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-12-12 23:39:58,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 15 [2022-12-12 23:39:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:58,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:39:58,720 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-12 23:39:58,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 78 [2022-12-12 23:39:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:39:59,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657638372] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:39:59,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:39:59,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2022-12-12 23:39:59,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395230625] [2022-12-12 23:39:59,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:39:59,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-12 23:39:59,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:39:59,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-12 23:39:59,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-12-12 23:39:59,380 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:39:59,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 1335 transitions, 48646 flow. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 23:39:59,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:39:59,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:39:59,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:40:02,298 INFO L130 PetriNetUnfolder]: 1370/2508 cut-off events. [2022-12-12 23:40:02,299 INFO L131 PetriNetUnfolder]: For 5518/5518 co-relation queries the response was YES. [2022-12-12 23:40:02,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47352 conditions, 2508 events. 1370/2508 cut-off events. For 5518/5518 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14884 event pairs, 0 based on Foata normal form. 4/2018 useless extension candidates. Maximal degree in co-relation 22968. Up to 2461 conditions per place. [2022-12-12 23:40:02,324 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 1077 selfloop transitions, 294 changer transitions 17/1389 dead transitions. [2022-12-12 23:40:02,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1389 transitions, 53411 flow [2022-12-12 23:40:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 23:40:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 23:40:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 133 transitions. [2022-12-12 23:40:02,326 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35561497326203206 [2022-12-12 23:40:02,326 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2022-12-12 23:40:02,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 1389 transitions, 53411 flow [2022-12-12 23:40:02,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 1372 transitions, 52744 flow [2022-12-12 23:40:02,361 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 1372 transitions, 52744 flow [2022-12-12 23:40:02,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 23:40:02,361 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:40:02,361 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:40:02,366 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 23:40:02,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 23:40:02,562 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:40:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:40:02,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1071008363, now seen corresponding path program 11 times [2022-12-12 23:40:02,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:40:02,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883361951] [2022-12-12 23:40:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:40:02,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:40:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:40:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:40:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883361951] [2022-12-12 23:40:03,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883361951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:40:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726805661] [2022-12-12 23:40:03,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:40:03,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:40:03,711 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 23:40:03,735 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 23:40:03,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:40:03,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:40:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-12 23:40:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:40:04,215 INFO L321 Elim1Store]: treesize reduction 26, result has 62.3 percent of original size [2022-12-12 23:40:04,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 54 [2022-12-12 23:40:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:04,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:40:04,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:04,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 105 treesize of output 232 [2022-12-12 23:40:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:07,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726805661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:40:07,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:40:07,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2022-12-12 23:40:07,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759492400] [2022-12-12 23:40:07,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:40:07,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-12 23:40:07,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:40:07,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-12 23:40:07,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-12-12 23:40:07,685 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:40:07,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 1372 transitions, 52744 flow. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 23:40:07,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:40:07,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:40:07,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:40:14,750 INFO L130 PetriNetUnfolder]: 1624/3161 cut-off events. [2022-12-12 23:40:14,750 INFO L131 PetriNetUnfolder]: For 5924/5924 co-relation queries the response was YES. [2022-12-12 23:40:14,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62995 conditions, 3161 events. 1624/3161 cut-off events. For 5924/5924 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20822 event pairs, 0 based on Foata normal form. 18/2620 useless extension candidates. Maximal degree in co-relation 29403. Up to 3115 conditions per place. [2022-12-12 23:40:14,774 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 1299 selfloop transitions, 437 changer transitions 84/1821 dead transitions. [2022-12-12 23:40:14,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1821 transitions, 73725 flow [2022-12-12 23:40:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-12 23:40:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-12 23:40:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 249 transitions. [2022-12-12 23:40:14,776 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35724533715925394 [2022-12-12 23:40:14,777 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2022-12-12 23:40:14,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 1821 transitions, 73725 flow [2022-12-12 23:40:14,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 1737 transitions, 70278 flow [2022-12-12 23:40:14,871 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 1737 transitions, 70278 flow [2022-12-12 23:40:14,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 23:40:14,871 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:40:14,871 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:40:14,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-12 23:40:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:15,072 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:40:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:40:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash -397375939, now seen corresponding path program 12 times [2022-12-12 23:40:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:40:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239413737] [2022-12-12 23:40:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:40:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:40:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:40:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:15,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:40:15,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239413737] [2022-12-12 23:40:15,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239413737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:40:15,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213706985] [2022-12-12 23:40:15,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:40:15,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:15,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:40:15,788 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:40:15,813 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 23:40:15,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:40:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:40:15,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 23:40:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:40:16,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:16,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-12-12 23:40:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:40:16,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:40:16,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:16,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 78 [2022-12-12 23:40:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:40:16,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213706985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:40:16,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:40:16,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2022-12-12 23:40:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643875809] [2022-12-12 23:40:16,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:40:16,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 23:40:16,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:40:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 23:40:16,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-12-12 23:40:16,494 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:40:16,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1737 transitions, 70278 flow. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 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 23:40:16,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:40:16,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:40:16,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:40:19,188 INFO L130 PetriNetUnfolder]: 1664/3240 cut-off events. [2022-12-12 23:40:19,188 INFO L131 PetriNetUnfolder]: For 6327/6327 co-relation queries the response was YES. [2022-12-12 23:40:19,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67798 conditions, 3240 events. 1664/3240 cut-off events. For 6327/6327 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 21609 event pairs, 0 based on Foata normal form. 6/2715 useless extension candidates. Maximal degree in co-relation 29890. Up to 3194 conditions per place. [2022-12-12 23:40:19,213 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 1707 selfloop transitions, 84 changer transitions 72/1864 dead transitions. [2022-12-12 23:40:19,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1864 transitions, 79180 flow [2022-12-12 23:40:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 23:40:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 23:40:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 166 transitions. [2022-12-12 23:40:19,214 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3367139959432049 [2022-12-12 23:40:19,215 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 296 predicate places. [2022-12-12 23:40:19,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 317 places, 1864 transitions, 79180 flow [2022-12-12 23:40:19,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 311 places, 1792 transitions, 76090 flow [2022-12-12 23:40:19,258 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 1792 transitions, 76090 flow [2022-12-12 23:40:19,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 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 23:40:19,259 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:40:19,259 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:40:19,264 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 23:40:19,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:19,459 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:40:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:40:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash 447305967, now seen corresponding path program 13 times [2022-12-12 23:40:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:40:19,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080280009] [2022-12-12 23:40:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:40:19,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:40:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:40:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:40:20,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080280009] [2022-12-12 23:40:20,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080280009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:40:20,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787971220] [2022-12-12 23:40:20,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:40:20,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:20,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:40:20,438 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 23:40:20,440 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 23:40:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:40:20,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-12 23:40:20,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:40:20,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:20,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-12-12 23:40:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:20,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:40:21,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:21,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 78 [2022-12-12 23:40:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:21,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787971220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:40:21,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:40:21,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2022-12-12 23:40:21,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819023152] [2022-12-12 23:40:21,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:40:21,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-12 23:40:21,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:40:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-12 23:40:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2022-12-12 23:40:21,578 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:40:21,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 1792 transitions, 76090 flow. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 23:40:21,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:40:21,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:40:21,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:40:26,214 INFO L130 PetriNetUnfolder]: 2450/4781 cut-off events. [2022-12-12 23:40:26,214 INFO L131 PetriNetUnfolder]: For 7049/7049 co-relation queries the response was YES. [2022-12-12 23:40:26,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105067 conditions, 4781 events. 2450/4781 cut-off events. For 7049/7049 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34578 event pairs, 0 based on Foata normal form. 21/3993 useless extension candidates. Maximal degree in co-relation 55140. Up to 4735 conditions per place. [2022-12-12 23:40:26,253 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 2211 selfloop transitions, 458 changer transitions 139/2809 dead transitions. [2022-12-12 23:40:26,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 2809 transitions, 124948 flow [2022-12-12 23:40:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 23:40:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 23:40:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 178 transitions. [2022-12-12 23:40:26,254 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34901960784313724 [2022-12-12 23:40:26,255 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 319 predicate places. [2022-12-12 23:40:26,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 2809 transitions, 124948 flow [2022-12-12 23:40:26,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 2670 transitions, 118688 flow [2022-12-12 23:40:26,323 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 2670 transitions, 118688 flow [2022-12-12 23:40:26,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 23:40:26,323 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:40:26,323 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:40:26,329 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 23:40:26,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:26,524 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:40:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:40:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash 332838159, now seen corresponding path program 14 times [2022-12-12 23:40:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:40:26,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9013309] [2022-12-12 23:40:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:40:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:40:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:40:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:27,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:40:27,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9013309] [2022-12-12 23:40:27,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9013309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:40:27,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871084213] [2022-12-12 23:40:27,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:40:27,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:27,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:40:27,384 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 23:40:27,412 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 23:40:27,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:40:27,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:40:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 23:40:27,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:40:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:40:27,781 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 30 treesize of output 30 [2022-12-12 23:40:27,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:27,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-12-12 23:40:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:40:27,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:40:28,059 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset)) (.cse2 (+ .cse4 c_~q~0.offset 4))) (and (forall ((v_ArrVal_737 (Array Int Int))) (<= c_~N~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_737) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))))) (forall ((v_ArrVal_737 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_737) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse1) (select .cse3 .cse2))) (+ c_~N~0 1)))))) is different from false [2022-12-12 23:40:28,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:28,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 140 [2022-12-12 23:40:28,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:28,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-12-12 23:40:28,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:28,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-12 23:40:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:40:28,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871084213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:40:28,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:40:28,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 32 [2022-12-12 23:40:28,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720805053] [2022-12-12 23:40:28,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:40:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-12 23:40:28,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:40:28,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-12 23:40:28,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=959, Unknown=1, NotChecked=62, Total=1122 [2022-12-12 23:40:28,428 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:40:28,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 2670 transitions, 118688 flow. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 23:40:28,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:40:28,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:40:28,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:40:34,002 INFO L130 PetriNetUnfolder]: 2482/4863 cut-off events. [2022-12-12 23:40:34,002 INFO L131 PetriNetUnfolder]: For 11415/11415 co-relation queries the response was YES. [2022-12-12 23:40:34,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111358 conditions, 4863 events. 2482/4863 cut-off events. For 11415/11415 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35353 event pairs, 0 based on Foata normal form. 5/4129 useless extension candidates. Maximal degree in co-relation 56178. Up to 4800 conditions per place. [2022-12-12 23:40:34,044 INFO L137 encePairwiseOnDemand]: 4/17 looper letters, 2611 selfloop transitions, 217 changer transitions 16/2845 dead transitions. [2022-12-12 23:40:34,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 2845 transitions, 132250 flow [2022-12-12 23:40:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-12 23:40:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-12 23:40:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 159 transitions. [2022-12-12 23:40:34,046 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33403361344537813 [2022-12-12 23:40:34,046 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 343 predicate places. [2022-12-12 23:40:34,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 364 places, 2845 transitions, 132250 flow [2022-12-12 23:40:34,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 2829 transitions, 131493 flow [2022-12-12 23:40:34,196 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 2829 transitions, 131493 flow [2022-12-12 23:40:34,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 23:40:34,196 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:40:34,196 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:40:34,201 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 23:40:34,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:34,397 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:40:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:40:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash 500807189, now seen corresponding path program 15 times [2022-12-12 23:40:34,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:40:34,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890048051] [2022-12-12 23:40:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:40:34,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:40:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:40:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:40:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890048051] [2022-12-12 23:40:35,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890048051] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:40:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68627979] [2022-12-12 23:40:35,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:40:35,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:35,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:40:35,325 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 23:40:35,343 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 23:40:35,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:40:35,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:40:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 23:40:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:40:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:40:35,705 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 19 treesize of output 21 [2022-12-12 23:40:35,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:35,904 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 12 [2022-12-12 23:40:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:40:35,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:40:36,142 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse1 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse2 (+ .cse5 c_~q~0.offset 4)) (.cse3 (+ .cse5 c_~q~0.offset))) (and (forall ((v_ArrVal_776 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_776) c_~q~0.base))) (or (not (= (select .cse0 .cse1) 1)) (< (+ c_~s~0 (select .cse0 .cse2) (select .cse0 .cse3)) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|))))) (forall ((v_ArrVal_776 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_776) c_~q~0.base))) (or (not (= (select .cse4 .cse1) 1)) (< |c_thread1Thread1of1ForFork0_~i~0#1| (+ c_~s~0 (select .cse4 .cse2) (select .cse4 .cse3))))))))) is different from false [2022-12-12 23:40:36,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:36,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 186 [2022-12-12 23:40:36,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:36,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 136 [2022-12-12 23:40:36,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:36,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 116 [2022-12-12 23:40:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:40:36,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68627979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:40:36,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:40:36,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 30 [2022-12-12 23:40:36,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529017791] [2022-12-12 23:40:36,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:40:36,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 23:40:36,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:40:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 23:40:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=845, Unknown=1, NotChecked=58, Total=992 [2022-12-12 23:40:36,560 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:40:36,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 2829 transitions, 131493 flow. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 23:40:36,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:40:36,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:40:36,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:40:42,772 INFO L130 PetriNetUnfolder]: 2515/4943 cut-off events. [2022-12-12 23:40:42,772 INFO L131 PetriNetUnfolder]: For 12273/12273 co-relation queries the response was YES. [2022-12-12 23:40:42,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118109 conditions, 4943 events. 2515/4943 cut-off events. For 12273/12273 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36297 event pairs, 0 based on Foata normal form. 6/4218 useless extension candidates. Maximal degree in co-relation 58981. Up to 4880 conditions per place. [2022-12-12 23:40:42,827 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 2675 selfloop transitions, 156 changer transitions 74/2906 dead transitions. [2022-12-12 23:40:42,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 2906 transitions, 140902 flow [2022-12-12 23:40:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 23:40:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 23:40:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 172 transitions. [2022-12-12 23:40:42,828 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33725490196078434 [2022-12-12 23:40:42,829 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 372 predicate places. [2022-12-12 23:40:42,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 393 places, 2906 transitions, 140902 flow [2022-12-12 23:40:42,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 387 places, 2832 transitions, 137284 flow [2022-12-12 23:40:42,912 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 2832 transitions, 137284 flow [2022-12-12 23:40:42,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 23:40:42,912 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:40:42,913 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:40:42,918 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 23:40:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-12 23:40:43,113 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:40:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:40:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1969191491, now seen corresponding path program 16 times [2022-12-12 23:40:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:40:43,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634047649] [2022-12-12 23:40:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:40:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:40:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:40:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:40:44,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634047649] [2022-12-12 23:40:44,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634047649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:40:44,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598568183] [2022-12-12 23:40:44,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:40:44,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:40:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:40:44,077 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 23:40:44,078 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 23:40:44,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:40:44,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:40:44,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-12 23:40:44,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:40:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:40:44,390 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 18 treesize of output 20 [2022-12-12 23:40:44,599 INFO L321 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-12-12 23:40:44,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 26 [2022-12-12 23:40:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:44,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:40:45,052 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-12 23:40:45,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 184 [2022-12-12 23:40:45,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:45,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 135 [2022-12-12 23:40:45,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:40:45,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 116 [2022-12-12 23:40:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:40:46,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598568183] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:40:46,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:40:46,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2022-12-12 23:40:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401021298] [2022-12-12 23:40:46,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:40:46,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 23:40:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:40:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 23:40:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1211, Unknown=2, NotChecked=0, Total=1406 [2022-12-12 23:40:46,013 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:40:46,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 2832 transitions, 137284 flow. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:40:46,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:40:46,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:40:46,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:40:55,591 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 88 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:41:04,454 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 97 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:41:27,391 WARN L233 SmtUtils]: Spent 22.58s on a formula simplification. DAG size of input: 110 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:41:36,076 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 110 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:41:44,886 WARN L233 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 106 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:41:54,647 WARN L233 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 111 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:42:03,459 WARN L233 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 92 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:42:11,806 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 98 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:42:20,528 WARN L233 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 107 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:42:25,152 INFO L130 PetriNetUnfolder]: 2634/5195 cut-off events. [2022-12-12 23:42:25,152 INFO L131 PetriNetUnfolder]: For 13176/13176 co-relation queries the response was YES. [2022-12-12 23:42:25,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129327 conditions, 5195 events. 2634/5195 cut-off events. For 13176/13176 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 38523 event pairs, 0 based on Foata normal form. 10/4442 useless extension candidates. Maximal degree in co-relation 66964. Up to 5132 conditions per place. [2022-12-12 23:42:25,197 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 2302 selfloop transitions, 741 changer transitions 34/3078 dead transitions. [2022-12-12 23:42:25,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 3078 transitions, 155378 flow [2022-12-12 23:42:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-12 23:42:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-12 23:42:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 242 transitions. [2022-12-12 23:42:25,199 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3558823529411765 [2022-12-12 23:42:25,199 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 404 predicate places. [2022-12-12 23:42:25,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 425 places, 3078 transitions, 155378 flow [2022-12-12 23:42:25,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 421 places, 3044 transitions, 153645 flow [2022-12-12 23:42:25,287 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 3044 transitions, 153645 flow [2022-12-12 23:42:25,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:42:25,287 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:42:25,288 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:42:25,294 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 23:42:25,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-12 23:42:25,494 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:42:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:42:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash -371222319, now seen corresponding path program 17 times [2022-12-12 23:42:25,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:42:25,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113289518] [2022-12-12 23:42:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:42:25,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:42:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:42:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:42:26,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:42:26,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113289518] [2022-12-12 23:42:26,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113289518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:42:26,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109483781] [2022-12-12 23:42:26,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:42:26,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:42:26,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:42:26,652 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:42:26,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 23:42:26,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:42:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:42:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-12 23:42:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:42:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:42:27,106 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 30 treesize of output 30 [2022-12-12 23:42:27,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:42:27,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-12-12 23:42:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:42:27,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:42:27,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:42:27,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 140 [2022-12-12 23:42:27,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:42:27,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-12-12 23:42:27,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:42:27,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-12 23:42:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:42:28,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109483781] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:42:28,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:42:28,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2022-12-12 23:42:28,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122628298] [2022-12-12 23:42:28,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:42:28,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 23:42:28,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:42:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 23:42:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1176, Unknown=4, NotChecked=0, Total=1406 [2022-12-12 23:42:28,098 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:42:28,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 3044 transitions, 153645 flow. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:42:28,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:42:28,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:42:28,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:42:33,556 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse0 (select |c_#memory_int| c_~q~0.base)) (.cse1 (+ .cse5 c_~q~0.offset))) (and (= c_~s~0 c_~N~0) (or (not (<= 0 c_~q_back~0)) (= (+ c_~s~0 (select .cse0 .cse1)) c_~N~0) (not (< c_~q_back~0 c_~n~0)) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) (or (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< c_~n~0 (+ 2 c_~q_back~0)) (let ((.cse3 (+ .cse5 c_~q~0.offset 4))) (and (forall ((v_ArrVal_854 (Array Int Int))) (< (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~q~0.base))) (+ c_~s~0 (select .cse2 .cse1) (select .cse2 .cse3))) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|))) (forall ((v_ArrVal_854 (Array Int Int))) (< |c_thread1Thread1of1ForFork0_~i~0#1| (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~q~0.base))) (+ c_~s~0 (select .cse4 .cse1) (select .cse4 .cse3))))))) (< c_~n~0 (+ c_~q_front~0 2)) (< c_~q_front~0 0))))) is different from false [2022-12-12 23:42:34,983 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (<= c_~s~0 c_~N~0)) (.cse1 (* 4 c_~q_back~0))) (and (<= c_~N~0 c_~s~0) .cse0 (or (and .cse0 (<= |c_thread1Thread1of1ForFork0_~i~0#1| c_~s~0)) (<= (* c_~n~0 4) (+ c_~q~0.offset 3 .cse1))) (= c_~q~0.offset 0) (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset .cse1)) 1)) (< c_~n~0 (+ 2 c_~q_back~0)) (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse6 c_~q~0.offset)) (.cse4 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_854 (Array Int Int))) (< (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~q~0.base))) (+ c_~s~0 (select .cse2 .cse3) (select .cse2 .cse4))) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|))) (forall ((v_ArrVal_854 (Array Int Int))) (< |c_thread1Thread1of1ForFork0_~i~0#1| (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~q~0.base))) (+ c_~s~0 (select .cse5 .cse3) (select .cse5 .cse4)))))))) (< c_~n~0 (+ c_~q_front~0 2)) (< c_~q_front~0 0)))) is different from false [2022-12-12 23:42:40,326 INFO L130 PetriNetUnfolder]: 3791/7303 cut-off events. [2022-12-12 23:42:40,326 INFO L131 PetriNetUnfolder]: For 14350/14350 co-relation queries the response was YES. [2022-12-12 23:42:40,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189418 conditions, 7303 events. 3791/7303 cut-off events. For 14350/14350 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 56016 event pairs, 4 based on Foata normal form. 6/6223 useless extension candidates. Maximal degree in co-relation 111711. Up to 7240 conditions per place. [2022-12-12 23:42:40,394 INFO L137 encePairwiseOnDemand]: 5/17 looper letters, 3444 selfloop transitions, 871 changer transitions 18/4334 dead transitions. [2022-12-12 23:42:40,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 4334 transitions, 227225 flow [2022-12-12 23:42:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-12 23:42:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-12 23:42:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 274 transitions. [2022-12-12 23:42:40,395 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32235294117647056 [2022-12-12 23:42:40,396 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 443 predicate places. [2022-12-12 23:42:40,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 464 places, 4334 transitions, 227225 flow [2022-12-12 23:42:40,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 463 places, 4316 transitions, 226271 flow [2022-12-12 23:42:40,554 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 4316 transitions, 226271 flow [2022-12-12 23:42:40,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:42:40,555 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:42:40,555 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:42:40,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 23:42:40,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:42:40,756 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:42:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:42:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1345489095, now seen corresponding path program 18 times [2022-12-12 23:42:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:42:40,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628594007] [2022-12-12 23:42:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:42:40,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:42:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:42:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:42:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:42:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628594007] [2022-12-12 23:42:41,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628594007] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:42:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593255771] [2022-12-12 23:42:41,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:42:41,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:42:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:42:41,891 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:42:41,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 23:42:41,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:42:41,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:42:41,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-12 23:42:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:42:42,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-12 23:42:42,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-12 23:42:42,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-12 23:42:42,144 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 23:42:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:42:42,244 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 18 treesize of output 20 [2022-12-12 23:42:42,400 INFO L321 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2022-12-12 23:42:42,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 24 [2022-12-12 23:42:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:42:42,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:42:50,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:42:50,231 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 107 [2022-12-12 23:42:50,279 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-12 23:42:50,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 233 [2022-12-12 23:42:50,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:42:50,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:42:50,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 133 [2022-12-12 23:42:50,344 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-12 23:42:50,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 143 [2022-12-12 23:42:51,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:42:51,419 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 3 case distinctions, treesize of input 181 treesize of output 107 [2022-12-12 23:42:51,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:42:51,443 INFO L321 Elim1Store]: treesize reduction 56, result has 13.8 percent of original size [2022-12-12 23:42:51,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 91 [2022-12-12 23:42:51,465 INFO L321 Elim1Store]: treesize reduction 56, result has 13.8 percent of original size [2022-12-12 23:42:51,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 55 [2022-12-12 23:42:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:42:51,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593255771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:42:51,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:42:51,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2022-12-12 23:42:51,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380614975] [2022-12-12 23:42:51,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:42:51,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 23:42:51,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:42:51,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 23:42:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1265, Unknown=4, NotChecked=0, Total=1406 [2022-12-12 23:42:51,607 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:42:51,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 4316 transitions, 226271 flow. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:42:51,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:42:51,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:42:51,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:43:03,355 WARN L233 SmtUtils]: Spent 9.34s on a formula simplification. DAG size of input: 172 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:43:24,223 WARN L233 SmtUtils]: Spent 20.79s on a formula simplification. DAG size of input: 166 DAG size of output: 117 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:43:33,456 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 158 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:43:38,728 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 152 DAG size of output: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:43:40,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:43:59,600 WARN L233 SmtUtils]: Spent 15.33s on a formula simplification. DAG size of input: 152 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:44:01,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:44:09,065 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 178 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:44:11,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:44:15,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:44:19,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:44:21,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:44:36,118 INFO L130 PetriNetUnfolder]: 4185/8098 cut-off events. [2022-12-12 23:44:36,118 INFO L131 PetriNetUnfolder]: For 15396/15396 co-relation queries the response was YES. [2022-12-12 23:44:36,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218182 conditions, 8098 events. 4185/8098 cut-off events. For 15396/15396 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 62413 event pairs, 6 based on Foata normal form. 21/7018 useless extension candidates. Maximal degree in co-relation 134152. Up to 8035 conditions per place. [2022-12-12 23:44:36,202 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 3265 selfloop transitions, 1410 changer transitions 132/4808 dead transitions. [2022-12-12 23:44:36,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 4808 transitions, 261595 flow [2022-12-12 23:44:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-12 23:44:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-12 23:44:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 198 transitions. [2022-12-12 23:44:36,204 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2022-12-12 23:44:36,204 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 467 predicate places. [2022-12-12 23:44:36,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 488 places, 4808 transitions, 261595 flow [2022-12-12 23:44:36,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 486 places, 4676 transitions, 254326 flow [2022-12-12 23:44:36,347 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 4676 transitions, 254326 flow [2022-12-12 23:44:36,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:44:36,347 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:44:36,348 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:44:36,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-12 23:44:36,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:44:36,548 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:44:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:44:36,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1839606621, now seen corresponding path program 19 times [2022-12-12 23:44:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:44:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894208196] [2022-12-12 23:44:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:44:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:44:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:44:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:44:37,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:44:37,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894208196] [2022-12-12 23:44:37,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894208196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:44:37,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145934684] [2022-12-12 23:44:37,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:44:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:44:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:44:37,846 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:44:37,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 23:44:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:44:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-12 23:44:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:44:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:44:38,286 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 31 treesize of output 31 [2022-12-12 23:44:38,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:44:38,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-12-12 23:44:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:44:38,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:44:38,821 WARN L837 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset 4)) (.cse2 (+ .cse4 c_~q~0.offset))) (and (forall ((v_ArrVal_939 (Array Int Int))) (<= c_~N~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_939) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))))) (forall ((v_ArrVal_939 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_939) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse1) (select .cse3 .cse2))) (+ c_~N~0 1)))))) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) is different from false [2022-12-12 23:44:38,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:44:38,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 140 [2022-12-12 23:44:38,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:44:38,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-12-12 23:44:38,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:44:38,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-12 23:44:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:44:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145934684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:44:39,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:44:39,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2022-12-12 23:44:39,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830898162] [2022-12-12 23:44:39,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:44:39,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 23:44:39,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:44:39,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 23:44:39,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1143, Unknown=8, NotChecked=70, Total=1406 [2022-12-12 23:44:39,428 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:44:39,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 4676 transitions, 254326 flow. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:44:39,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:44:39,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:44:39,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:45:02,772 INFO L130 PetriNetUnfolder]: 4568/8812 cut-off events. [2022-12-12 23:45:02,772 INFO L131 PetriNetUnfolder]: For 17575/17575 co-relation queries the response was YES. [2022-12-12 23:45:02,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246207 conditions, 8812 events. 4568/8812 cut-off events. For 17575/17575 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68074 event pairs, 6 based on Foata normal form. 39/7678 useless extension candidates. Maximal degree in co-relation 152421. Up to 8746 conditions per place. [2022-12-12 23:45:02,856 INFO L137 encePairwiseOnDemand]: 5/17 looper letters, 3301 selfloop transitions, 1599 changer transitions 312/5213 dead transitions. [2022-12-12 23:45:02,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 5213 transitions, 294063 flow [2022-12-12 23:45:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-12 23:45:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-12 23:45:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 209 transitions. [2022-12-12 23:45:02,858 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3322734499205087 [2022-12-12 23:45:02,858 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 501 predicate places. [2022-12-12 23:45:02,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 522 places, 5213 transitions, 294063 flow [2022-12-12 23:45:03,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 4901 transitions, 276276 flow [2022-12-12 23:45:03,019 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 4901 transitions, 276276 flow [2022-12-12 23:45:03,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:45:03,019 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:45:03,019 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:45:03,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 23:45:03,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 23:45:03,220 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:45:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:45:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash -882857409, now seen corresponding path program 20 times [2022-12-12 23:45:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:45:03,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186807179] [2022-12-12 23:45:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:45:03,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:45:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:45:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:45:03,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:45:03,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186807179] [2022-12-12 23:45:03,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186807179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:45:03,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541749124] [2022-12-12 23:45:03,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:45:03,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:45:03,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:45:03,336 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:45:03,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 23:45:03,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:45:03,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:45:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 23:45:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:45:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:45:03,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:45:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:45:03,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541749124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:45:03,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:45:03,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2022-12-12 23:45:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808704234] [2022-12-12 23:45:03,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:45:03,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:45:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:45:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:45:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:45:03,650 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:45:03,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 4901 transitions, 276276 flow. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 23:45:03,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:45:03,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:45:03,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:45:31,753 INFO L130 PetriNetUnfolder]: 5843/11247 cut-off events. [2022-12-12 23:45:31,753 INFO L131 PetriNetUnfolder]: For 19286/19286 co-relation queries the response was YES. [2022-12-12 23:45:31,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325690 conditions, 11247 events. 5843/11247 cut-off events. For 19286/19286 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 90469 event pairs, 6 based on Foata normal form. 316/10191 useless extension candidates. Maximal degree in co-relation 211859. Up to 11181 conditions per place. [2022-12-12 23:45:31,966 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 4548 selfloop transitions, 1364 changer transitions 773/6691 dead transitions. [2022-12-12 23:45:31,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 6691 transitions, 390555 flow [2022-12-12 23:45:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:45:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:45:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2022-12-12 23:45:31,967 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2022-12-12 23:45:31,968 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 496 predicate places. [2022-12-12 23:45:31,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 517 places, 6691 transitions, 390555 flow [2022-12-12 23:45:32,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 480 places, 5918 transitions, 345166 flow [2022-12-12 23:45:32,157 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 5918 transitions, 345166 flow [2022-12-12 23:45:32,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 23:45:32,158 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:45:32,158 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:45:32,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-12 23:45:32,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 23:45:32,358 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:45:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:45:32,359 INFO L85 PathProgramCache]: Analyzing trace with hash -315838488, now seen corresponding path program 21 times [2022-12-12 23:45:32,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:45:32,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272776120] [2022-12-12 23:45:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:45:32,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:45:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:45:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:45:33,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:45:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272776120] [2022-12-12 23:45:33,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272776120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:45:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710996867] [2022-12-12 23:45:33,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:45:33,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:45:33,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:45:33,667 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:45:33,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 23:45:33,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 23:45:33,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:45:33,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 23:45:33,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:45:34,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:45:34,158 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 12 [2022-12-12 23:45:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:45:34,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:45:34,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:45:34,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 81 [2022-12-12 23:45:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 23:45:34,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710996867] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:45:34,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:45:34,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 28 [2022-12-12 23:45:34,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290835609] [2022-12-12 23:45:34,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:45:34,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 23:45:34,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:45:34,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 23:45:34,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-12-12 23:45:34,691 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:45:34,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 5918 transitions, 345166 flow. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 23:45:34,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:45:34,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:45:34,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:46:10,035 INFO L130 PetriNetUnfolder]: 5219/9986 cut-off events. [2022-12-12 23:46:10,035 INFO L131 PetriNetUnfolder]: For 12801/12801 co-relation queries the response was YES. [2022-12-12 23:46:10,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299391 conditions, 9986 events. 5219/9986 cut-off events. For 12801/12801 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 78043 event pairs, 6 based on Foata normal form. 3/8942 useless extension candidates. Maximal degree in co-relation 202773. Up to 9938 conditions per place. [2022-12-12 23:46:10,147 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 5846 selfloop transitions, 89 changer transitions 27/5963 dead transitions. [2022-12-12 23:46:10,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 5963 transitions, 359736 flow [2022-12-12 23:46:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 23:46:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 23:46:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 155 transitions. [2022-12-12 23:46:10,148 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2022-12-12 23:46:10,149 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 489 predicate places. [2022-12-12 23:46:10,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 510 places, 5963 transitions, 359736 flow [2022-12-12 23:46:10,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 507 places, 5936 transitions, 358089 flow [2022-12-12 23:46:10,353 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 5936 transitions, 358089 flow [2022-12-12 23:46:10,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 23:46:10,353 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:46:10,353 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:46:10,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 23:46:10,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 23:46:10,560 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:46:10,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:46:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -62933297, now seen corresponding path program 22 times [2022-12-12 23:46:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:46:10,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055197025] [2022-12-12 23:46:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:46:10,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:46:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:46:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:46:11,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:46:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055197025] [2022-12-12 23:46:11,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055197025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:46:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137727312] [2022-12-12 23:46:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:46:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:46:11,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:46:11,109 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:46:11,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 23:46:11,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:46:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:46:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 23:46:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:46:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:46:11,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:46:11,759 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-12 23:46:11,759 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 26 treesize of output 18 [2022-12-12 23:46:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:46:12,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137727312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:46:12,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:46:12,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-12-12 23:46:12,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652571148] [2022-12-12 23:46:12,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:46:12,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-12 23:46:12,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:46:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-12 23:46:12,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-12-12 23:46:12,154 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:46:12,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 5936 transitions, 358089 flow. Second operand has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 23:46:12,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:46:12,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:46:12,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:46:57,940 INFO L130 PetriNetUnfolder]: 6270/11889 cut-off events. [2022-12-12 23:46:57,940 INFO L131 PetriNetUnfolder]: For 14100/14100 co-relation queries the response was YES. [2022-12-12 23:46:57,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368475 conditions, 11889 events. 6270/11889 cut-off events. For 14100/14100 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 95099 event pairs, 6 based on Foata normal form. 0/10505 useless extension candidates. Maximal degree in co-relation 221836. Up to 11841 conditions per place. [2022-12-12 23:46:58,072 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 4703 selfloop transitions, 2325 changer transitions 0/7034 dead transitions. [2022-12-12 23:46:58,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 7034 transitions, 438433 flow [2022-12-12 23:46:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-12 23:46:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-12 23:46:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 285 transitions. [2022-12-12 23:46:58,074 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2022-12-12 23:46:58,075 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 520 predicate places. [2022-12-12 23:46:58,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 7034 transitions, 438433 flow [2022-12-12 23:46:58,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 541 places, 7034 transitions, 438433 flow [2022-12-12 23:46:58,347 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 7034 transitions, 438433 flow [2022-12-12 23:46:58,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 23:46:58,348 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:46:58,348 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:46:58,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-12 23:46:58,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:46:58,548 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:46:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:46:58,549 INFO L85 PathProgramCache]: Analyzing trace with hash 281879289, now seen corresponding path program 23 times [2022-12-12 23:46:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:46:58,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371103327] [2022-12-12 23:46:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:46:58,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:46:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:46:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:46:59,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:46:59,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371103327] [2022-12-12 23:46:59,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371103327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:46:59,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853109512] [2022-12-12 23:46:59,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:46:59,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:46:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:46:59,124 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:46:59,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 23:46:59,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:46:59,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:46:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-12 23:46:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:46:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:46:59,534 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 19 treesize of output 21 [2022-12-12 23:46:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:46:59,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:46:59,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:46:59,870 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 47 treesize of output 44 [2022-12-12 23:46:59,874 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 25 treesize of output 18 [2022-12-12 23:47:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:47:00,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853109512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:47:00,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:47:00,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-12-12 23:47:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372606155] [2022-12-12 23:47:00,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:47:00,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 23:47:00,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:47:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 23:47:00,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1173, Unknown=4, NotChecked=0, Total=1406 [2022-12-12 23:47:00,222 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 23:47:00,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 7034 transitions, 438433 flow. Second operand has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 23:47:00,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:47:00,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 23:47:00,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:48:06,109 INFO L130 PetriNetUnfolder]: 8103/15378 cut-off events. [2022-12-12 23:48:06,109 INFO L131 PetriNetUnfolder]: For 18612/18612 co-relation queries the response was YES. [2022-12-12 23:48:06,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492052 conditions, 15378 events. 8103/15378 cut-off events. For 18612/18612 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 129260 event pairs, 2 based on Foata normal form. 0/13416 useless extension candidates. Maximal degree in co-relation 263485. Up to 15320 conditions per place. [2022-12-12 23:48:06,282 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 6528 selfloop transitions, 2477 changer transitions 0/9011 dead transitions. [2022-12-12 23:48:06,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 9011 transitions, 579830 flow [2022-12-12 23:48:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-12 23:48:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-12 23:48:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 318 transitions. [2022-12-12 23:48:06,288 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.505564387917329 [2022-12-12 23:48:06,289 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 554 predicate places. [2022-12-12 23:48:06,289 INFO L82 GeneralOperation]: Start removeDead. Operand has 575 places, 9011 transitions, 579830 flow [2022-12-12 23:48:06,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 575 places, 9011 transitions, 579830 flow [2022-12-12 23:48:06,638 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 9011 transitions, 579830 flow [2022-12-12 23:48:06,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 23:48:06,639 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:48:06,639 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:48:06,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-12 23:48:06,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:48:06,840 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:48:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:48:06,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2092649106, now seen corresponding path program 24 times [2022-12-12 23:48:06,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:48:06,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447488757] [2022-12-12 23:48:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:48:06,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:48:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:48:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:48:08,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:48:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447488757] [2022-12-12 23:48:08,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447488757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:48:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901906675] [2022-12-12 23:48:08,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:48:08,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:48:08,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:48:08,359 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:48:08,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 23:48:08,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:48:08,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:48:08,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 23:48:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:48:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:48:08,658 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 18 treesize of output 20 [2022-12-12 23:48:08,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:48:08,795 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 12 [2022-12-12 23:48:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 23:48:08,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:48:09,088 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse5 c_~q~0.offset)) (.cse3 (+ .cse5 c_~q~0.offset 4)) (.cse1 (+ c_~q~0.offset (* 4 c_~q_back~0)))) (and (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1147) c_~q~0.base))) (or (not (= (select .cse0 .cse1) 1)) (< |c_thread1Thread1of1ForFork0_~i~0#1| (+ c_~s~0 (select .cse0 .cse2) (select .cse0 .cse3)))))) (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1147) c_~q~0.base))) (or (< (+ c_~s~0 (select .cse4 .cse2) (select .cse4 .cse3)) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|)) (not (= (select .cse4 .cse1) 1)))))))) is different from false [2022-12-12 23:48:09,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:48:09,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 186 [2022-12-12 23:48:09,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:48:09,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 136 [2022-12-12 23:48:09,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:48:09,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 116 [2022-12-12 23:48:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 23:48:09,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901906675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:48:09,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:48:09,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 31 [2022-12-12 23:48:09,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131841051] [2022-12-12 23:48:09,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:48:09,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 23:48:09,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:48:09,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 23:48:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=904, Unknown=1, NotChecked=60, Total=1056 [2022-12-12 23:48:09,607 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:48:09,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 9011 transitions, 579830 flow. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 23:48:09,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:48:09,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:48:09,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:49:41,754 INFO L130 PetriNetUnfolder]: 8137/15503 cut-off events. [2022-12-12 23:49:41,754 INFO L131 PetriNetUnfolder]: For 19529/19529 co-relation queries the response was YES. [2022-12-12 23:49:41,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511549 conditions, 15503 events. 8137/15503 cut-off events. For 19529/19529 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 131119 event pairs, 2 based on Foata normal form. 7/13536 useless extension candidates. Maximal degree in co-relation 271720. Up to 15445 conditions per place. [2022-12-12 23:49:42,039 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 8828 selfloop transitions, 197 changer transitions 73/9099 dead transitions. [2022-12-12 23:49:42,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 9099 transitions, 603739 flow [2022-12-12 23:49:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-12 23:49:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-12 23:49:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 182 transitions. [2022-12-12 23:49:42,040 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2893481717011129 [2022-12-12 23:49:42,041 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 590 predicate places. [2022-12-12 23:49:42,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 611 places, 9099 transitions, 603739 flow [2022-12-12 23:49:42,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 605 places, 9026 transitions, 598852 flow [2022-12-12 23:49:42,403 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 9026 transitions, 598852 flow [2022-12-12 23:49:42,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 23:49:42,403 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:49:42,403 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:49:42,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-12 23:49:42,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:49:42,604 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:49:42,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:49:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1400276401, now seen corresponding path program 25 times [2022-12-12 23:49:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:49:42,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752899358] [2022-12-12 23:49:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:49:42,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:49:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:49:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:49:43,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:49:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752899358] [2022-12-12 23:49:43,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752899358] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:49:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336210389] [2022-12-12 23:49:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:49:43,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:49:43,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:49:43,077 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:49:43,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-12 23:49:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:49:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-12 23:49:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:49:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:49:43,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:49:43,754 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-12 23:49:43,754 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 26 treesize of output 18 [2022-12-12 23:49:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:49:44,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336210389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:49:44,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:49:44,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2022-12-12 23:49:44,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212398341] [2022-12-12 23:49:44,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:49:44,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-12 23:49:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:49:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-12 23:49:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2022-12-12 23:49:44,163 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 23:49:44,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 9026 transitions, 598852 flow. Second operand has 40 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 23:49:44,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:49:44,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 23:49:44,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 23:52:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-12-12 23:52:29,183 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 23:52:29,185 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 23:52:29,187 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:52:29,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-12 23:52:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-12 23:52:29,383 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (40states, 1/17 universal loopers) in iteration 33,while PetriNetUnfolder was constructing finite prefix that currently has 872551 conditions, 25662 events (14106/25661 cut-off events. For 22716/22716 co-relation queries the response was YES. Maximal size of possible extension queue 1996. Compared 244699 event pairs, 0 based on Foata normal form. 0/23588 useless extension candidates. Maximal degree in co-relation 428603. Up to 25600 conditions per place.). [2022-12-12 23:52:29,385 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 23:52:29,385 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 23:52:29,385 INFO L445 BasicCegarLoop]: Path program histogram: [25, 5, 1, 1, 1] [2022-12-12 23:52:29,388 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:52:29,388 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:52:29,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:52:29 BasicIcfg [2022-12-12 23:52:29,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:52:29,391 INFO L158 Benchmark]: Toolchain (without parser) took 807571.12ms. Allocated memory was 179.3MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 156.5MB in the beginning and 414.0MB in the end (delta: -257.5MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-12-12 23:52:29,391 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory was 155.7MB in the beginning and 155.5MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:52:29,391 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.57ms. Allocated memory is still 179.3MB. Free memory was 156.5MB in the beginning and 144.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 23:52:29,391 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.50ms. Allocated memory is still 179.3MB. Free memory was 144.4MB in the beginning and 142.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:52:29,392 INFO L158 Benchmark]: Boogie Preprocessor took 30.77ms. Allocated memory is still 179.3MB. Free memory was 142.3MB in the beginning and 140.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:52:29,392 INFO L158 Benchmark]: RCFGBuilder took 634.43ms. Allocated memory is still 179.3MB. Free memory was 140.7MB in the beginning and 116.6MB in the end (delta: 24.1MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2022-12-12 23:52:29,392 INFO L158 Benchmark]: TraceAbstraction took 806578.59ms. Allocated memory was 179.3MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 115.6MB in the beginning and 414.0MB in the end (delta: -298.4MB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. [2022-12-12 23:52:29,393 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory was 155.7MB in the beginning and 155.5MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 266.57ms. Allocated memory is still 179.3MB. Free memory was 156.5MB in the beginning and 144.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 44.50ms. Allocated memory is still 179.3MB. Free memory was 144.4MB in the beginning and 142.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.77ms. Allocated memory is still 179.3MB. Free memory was 142.3MB in the beginning and 140.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 634.43ms. Allocated memory is still 179.3MB. Free memory was 140.7MB in the beginning and 116.6MB in the end (delta: 24.1MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. * TraceAbstraction took 806578.59ms. Allocated memory was 179.3MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 115.6MB in the beginning and 414.0MB in the end (delta: -298.4MB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 110 PlacesBefore, 21 PlacesAfterwards, 114 TransitionsBefore, 17 TransitionsAfterwards, 538 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 70 TrivialYvCompositions, 19 ConcurrentYvCompositions, 7 ChoiceCompositions, 96 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 321, independent: 317, independent conditional: 317, independent unconditional: 0, dependent: 4, dependent conditional: 4, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 321, independent: 317, independent conditional: 0, independent unconditional: 317, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 321, independent: 317, independent conditional: 0, independent unconditional: 317, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 321, independent: 317, independent conditional: 0, independent unconditional: 317, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 292, independent: 288, independent conditional: 0, independent unconditional: 288, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 292, independent: 278, independent conditional: 0, independent unconditional: 278, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 14, independent: 10, independent conditional: 0, independent unconditional: 10, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 75, independent: 32, independent conditional: 0, independent unconditional: 32, dependent: 43, dependent conditional: 0, dependent unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 321, independent: 29, independent conditional: 0, independent unconditional: 29, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 292, unknown conditional: 0, unknown unconditional: 292] , Statistics on independence cache: Total cache size (in pairs): 463, Positive cache size: 459, Positive conditional cache size: 0, Positive unconditional cache size: 459, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (40states, 1/17 universal loopers) in iteration 33,while PetriNetUnfolder was constructing finite prefix that currently has 872551 conditions, 25662 events (14106/25661 cut-off events. For 22716/22716 co-relation queries the response was YES. Maximal size of possible extension queue 1996. Compared 244699 event pairs, 0 based on Foata normal form. 0/23588 useless extension candidates. Maximal degree in co-relation 428603. Up to 25600 conditions per place.). - TimeoutResultAtElement [Line: 93]: 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 (40states, 1/17 universal loopers) in iteration 33,while PetriNetUnfolder was constructing finite prefix that currently has 872551 conditions, 25662 events (14106/25661 cut-off events. For 22716/22716 co-relation queries the response was YES. Maximal size of possible extension queue 1996. Compared 244699 event pairs, 0 based on Foata normal form. 0/23588 useless extension candidates. Maximal degree in co-relation 428603. Up to 25600 conditions per place.). - TimeoutResultAtElement [Line: 92]: 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 (40states, 1/17 universal loopers) in iteration 33,while PetriNetUnfolder was constructing finite prefix that currently has 872551 conditions, 25662 events (14106/25661 cut-off events. For 22716/22716 co-relation queries the response was YES. Maximal size of possible extension queue 1996. Compared 244699 event pairs, 0 based on Foata normal form. 0/23588 useless extension candidates. Maximal degree in co-relation 428603. Up to 25600 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 134 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 2.6s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 806.4s, OverallIterations: 33, TraceHistogramMax: 4, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 730.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 118 mSolverCounterUnknown, 5804 SdHoareTripleChecker+Valid, 38.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5804 mSDsluCounter, 223 SdHoareTripleChecker+Invalid, 35.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 631 IncrementalHoareTripleChecker+Unchecked, 203 mSDsCounter, 2618 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26581 IncrementalHoareTripleChecker+Invalid, 29948 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2618 mSolverCounterUnsat, 20 mSDtfsCounter, 26581 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2218 GetRequests, 638 SyntacticMatches, 35 SemanticMatches, 1545 ConstructedPredicates, 9 IntricatePredicates, 3 DeprecatedPredicates, 24663 ImplicationChecksByTransitivity, 234.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=598852occurred in iteration=32, InterpolantAutomatonStates: 802, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 32 MinimizatonAttempts, 109599 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 57.1s InterpolantComputationTime, 1249 NumberOfCodeBlocks, 1248 NumberOfCodeBlocksAsserted, 96 NumberOfCheckSat, 1758 ConstructedInterpolants, 73 QuantifiedInterpolants, 38749 SizeOfPredicates, 527 NumberOfNonLiveVariables, 7082 ConjunctsInSsa, 1278 ConjunctsInUnsatCore, 93 InterpolantComputations, 3 PerfectInterpolantSequences, 155/951 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