/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:27:31,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:27:31,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:27:32,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:27:32,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:27:32,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:27:32,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:27:32,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:27:32,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:27:32,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:27:32,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:27:32,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:27:32,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:27:32,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:27:32,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:27:32,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:27:32,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:27:32,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:27:32,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:27:32,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:27:32,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:27:32,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:27:32,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:27:32,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:27:32,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:27:32,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:27:32,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:27:32,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:27:32,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:27:32,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:27:32,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:27:32,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:27:32,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:27:32,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:27:32,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:27:32,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:27:32,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:27:32,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:27:32,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:27:32,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:27:32,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:27:32,065 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 23:27:32,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:27:32,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:27:32,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:27:32,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:27:32,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:27:32,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:27:32,101 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:27:32,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:27:32,101 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:27:32,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:27:32,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:27:32,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:27:32,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:27:32,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:27:32,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:27:32,103 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:27:32,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:27:32,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:27:32,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:27:32,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:27:32,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:27:32,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:27:32,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:27:32,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:27:32,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:27:32,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:27:32,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:27:32,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:27:32,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:27:32,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:27:32,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:27:32,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:27:32,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:27:32,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:27:32,445 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:27:32,446 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:27:32,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-12-12 23:27:33,543 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:27:33,698 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:27:33,699 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-12-12 23:27:33,710 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc21e87f/16149d837c074589a56b2bab00ef3bfb/FLAGd7a3b70df [2022-12-12 23:27:33,728 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc21e87f/16149d837c074589a56b2bab00ef3bfb [2022-12-12 23:27:33,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:27:33,731 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:27:33,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:27:33,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:27:33,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:27:33,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:27:33" (1/1) ... [2022-12-12 23:27:33,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fc894d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:33, skipping insertion in model container [2022-12-12 23:27:33,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:27:33" (1/1) ... [2022-12-12 23:27:33,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:27:33,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:27:33,929 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:33,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:33,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:33,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:33,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:33,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:33,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:33,945 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:33,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:33,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:33,968 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-12-12 23:27:33,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:27:33,986 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:27:34,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:34,005 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:34,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:34,007 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:34,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:34,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:34,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:34,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:34,022 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:27:34,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:27:34,031 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-12-12 23:27:34,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:27:34,052 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:27:34,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34 WrapperNode [2022-12-12 23:27:34,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:27:34,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:27:34,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:27:34,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:27:34,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,119 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 257 [2022-12-12 23:27:34,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:27:34,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:27:34,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:27:34,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:27:34,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,151 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:27:34,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:27:34,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:27:34,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:27:34,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (1/1) ... [2022-12-12 23:27:34,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:27:34,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:34,194 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 23:27:34,206 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 23:27:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:27:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:27:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:27:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:27:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:27:34,239 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:27:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:27:34,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:27:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 23:27:34,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 23:27:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:27:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 23:27:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 23:27:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 23:27:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:27:34,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:27:34,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:27:34,242 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 23:27:34,332 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:27:34,334 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:27:34,747 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:27:34,872 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:27:34,872 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-12 23:27:34,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:27:34 BoogieIcfgContainer [2022-12-12 23:27:34,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:27:34,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:27:34,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:27:34,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:27:34,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:27:33" (1/3) ... [2022-12-12 23:27:34,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ac6843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:27:34, skipping insertion in model container [2022-12-12 23:27:34,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:27:34" (2/3) ... [2022-12-12 23:27:34,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ac6843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:27:34, skipping insertion in model container [2022-12-12 23:27:34,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:27:34" (3/3) ... [2022-12-12 23:27:34,882 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2022-12-12 23:27:34,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:27:34,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:27:34,897 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:27:34,965 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 23:27:35,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 206 transitions, 436 flow [2022-12-12 23:27:35,111 INFO L130 PetriNetUnfolder]: 18/203 cut-off events. [2022-12-12 23:27:35,111 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:27:35,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 203 events. 18/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 122 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2022-12-12 23:27:35,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 206 transitions, 436 flow [2022-12-12 23:27:35,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 193 transitions, 404 flow [2022-12-12 23:27:35,130 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:27:35,146 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 193 transitions, 404 flow [2022-12-12 23:27:35,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 193 transitions, 404 flow [2022-12-12 23:27:35,215 INFO L130 PetriNetUnfolder]: 18/193 cut-off events. [2022-12-12 23:27:35,216 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:27:35,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 193 events. 18/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 121 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2022-12-12 23:27:35,225 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 193 transitions, 404 flow [2022-12-12 23:27:35,225 INFO L226 LiptonReduction]: Number of co-enabled transitions 1880 [2022-12-12 23:27:43,223 INFO L241 LiptonReduction]: Total number of compositions: 164 [2022-12-12 23:27:43,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:27:43,240 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;@47d4c881, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:27:43,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 23:27:43,250 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2022-12-12 23:27:43,250 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:27:43,250 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:43,251 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:43,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1670425582, now seen corresponding path program 1 times [2022-12-12 23:27:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:43,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704992483] [2022-12-12 23:27:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:43,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:43,492 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 23:27:43,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:43,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704992483] [2022-12-12 23:27:43,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704992483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:43,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:43,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 23:27:43,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187261628] [2022-12-12 23:27:43,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-12 23:27:43,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-12 23:27:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-12 23:27:43,525 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:43,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 23:27:43,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:43,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:43,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:43,650 INFO L130 PetriNetUnfolder]: 323/460 cut-off events. [2022-12-12 23:27:43,650 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-12 23:27:43,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 460 events. 323/460 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1315 event pairs, 190 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 765. Up to 460 conditions per place. [2022-12-12 23:27:43,658 INFO L137 encePairwiseOnDemand]: 27/28 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2022-12-12 23:27:43,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 124 flow [2022-12-12 23:27:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-12 23:27:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-12 23:27:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 29 transitions. [2022-12-12 23:27:43,669 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2022-12-12 23:27:43,671 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2022-12-12 23:27:43,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 27 transitions, 124 flow [2022-12-12 23:27:43,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 124 flow [2022-12-12 23:27:43,675 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 124 flow [2022-12-12 23:27:43,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 23:27:43,675 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:43,676 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:43,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:27:43,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:43,684 INFO L85 PathProgramCache]: Analyzing trace with hash 70114748, now seen corresponding path program 1 times [2022-12-12 23:27:43,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:43,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737130796] [2022-12-12 23:27:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:43,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:43,944 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 23:27:43,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:43,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737130796] [2022-12-12 23:27:43,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737130796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:43,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:43,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 23:27:43,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255014967] [2022-12-12 23:27:43,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:43,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:27:43,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:43,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:27:43,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:27:43,948 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:43,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 23:27:43,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:43,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:43,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:44,082 INFO L130 PetriNetUnfolder]: 339/498 cut-off events. [2022-12-12 23:27:44,082 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-12-12 23:27:44,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 498 events. 339/498 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1507 event pairs, 201 based on Foata normal form. 26/385 useless extension candidates. Maximal degree in co-relation 1132. Up to 497 conditions per place. [2022-12-12 23:27:44,087 INFO L137 encePairwiseOnDemand]: 22/28 looper letters, 25 selfloop transitions, 2 changer transitions 13/41 dead transitions. [2022-12-12 23:27:44,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 269 flow [2022-12-12 23:27:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:27:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:27:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2022-12-12 23:27:44,089 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2022-12-12 23:27:44,089 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2022-12-12 23:27:44,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 41 transitions, 269 flow [2022-12-12 23:27:44,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 28 transitions, 182 flow [2022-12-12 23:27:44,092 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 182 flow [2022-12-12 23:27:44,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 23:27:44,092 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:44,092 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:44,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 23:27:44,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -954563074, now seen corresponding path program 1 times [2022-12-12 23:27:44,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:44,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327005947] [2022-12-12 23:27:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:44,323 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 23:27:44,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327005947] [2022-12-12 23:27:44,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327005947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:44,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:44,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:27:44,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641895170] [2022-12-12 23:27:44,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:44,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:27:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:44,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:27:44,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:27:44,325 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:44,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:44,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:44,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:44,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:44,484 INFO L130 PetriNetUnfolder]: 452/664 cut-off events. [2022-12-12 23:27:44,485 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-12-12 23:27:44,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 664 events. 452/664 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2344 event pairs, 280 based on Foata normal form. 46/537 useless extension candidates. Maximal degree in co-relation 1499. Up to 663 conditions per place. [2022-12-12 23:27:44,490 INFO L137 encePairwiseOnDemand]: 21/28 looper letters, 26 selfloop transitions, 2 changer transitions 14/43 dead transitions. [2022-12-12 23:27:44,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 368 flow [2022-12-12 23:27:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:27:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:27:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2022-12-12 23:27:44,492 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4375 [2022-12-12 23:27:44,493 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2022-12-12 23:27:44,494 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 43 transitions, 368 flow [2022-12-12 23:27:44,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 29 transitions, 244 flow [2022-12-12 23:27:44,497 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 244 flow [2022-12-12 23:27:44,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:44,497 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:44,497 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:44,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 23:27:44,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:44,498 INFO L85 PathProgramCache]: Analyzing trace with hash -891552058, now seen corresponding path program 1 times [2022-12-12 23:27:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221244545] [2022-12-12 23:27:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:27:45,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221244545] [2022-12-12 23:27:45,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221244545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:45,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:45,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 23:27:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670275560] [2022-12-12 23:27:45,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:45,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 23:27:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 23:27:45,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:27:45,447 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-12 23:27:45,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 244 flow. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 23:27:45,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:45,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-12 23:27:45,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:45,849 INFO L130 PetriNetUnfolder]: 565/811 cut-off events. [2022-12-12 23:27:45,849 INFO L131 PetriNetUnfolder]: For 425/425 co-relation queries the response was YES. [2022-12-12 23:27:45,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4005 conditions, 811 events. 565/811 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2621 event pairs, 13 based on Foata normal form. 1/608 useless extension candidates. Maximal degree in co-relation 3729. Up to 764 conditions per place. [2022-12-12 23:27:45,856 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 67 selfloop transitions, 28 changer transitions 3/98 dead transitions. [2022-12-12 23:27:45,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 98 transitions, 1025 flow [2022-12-12 23:27:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 23:27:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 23:27:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2022-12-12 23:27:45,860 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2022-12-12 23:27:45,861 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2022-12-12 23:27:45,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 98 transitions, 1025 flow [2022-12-12 23:27:45,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 95 transitions, 989 flow [2022-12-12 23:27:45,867 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 95 transitions, 989 flow [2022-12-12 23:27:45,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 23:27:45,867 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:45,868 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:45,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 23:27:45,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash 823190190, now seen corresponding path program 2 times [2022-12-12 23:27:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:45,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117639295] [2022-12-12 23:27:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:27:45,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117639295] [2022-12-12 23:27:45,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117639295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:45,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:45,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 23:27:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971810283] [2022-12-12 23:27:45,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:45,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 23:27:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:45,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 23:27:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 23:27:45,991 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:45,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 95 transitions, 989 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:45,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:45,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:45,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:46,103 INFO L130 PetriNetUnfolder]: 474/695 cut-off events. [2022-12-12 23:27:46,103 INFO L131 PetriNetUnfolder]: For 484/484 co-relation queries the response was YES. [2022-12-12 23:27:46,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4165 conditions, 695 events. 474/695 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2194 event pairs, 25 based on Foata normal form. 20/533 useless extension candidates. Maximal degree in co-relation 3859. Up to 674 conditions per place. [2022-12-12 23:27:46,109 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 88 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-12 23:27:46,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 95 transitions, 1175 flow [2022-12-12 23:27:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 23:27:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 23:27:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2022-12-12 23:27:46,111 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2022-12-12 23:27:46,111 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2022-12-12 23:27:46,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 95 transitions, 1175 flow [2022-12-12 23:27:46,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 95 transitions, 1175 flow [2022-12-12 23:27:46,117 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 95 transitions, 1175 flow [2022-12-12 23:27:46,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:46,117 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:46,117 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 23:27:46,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash 63408514, now seen corresponding path program 3 times [2022-12-12 23:27:46,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:46,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633542866] [2022-12-12 23:27:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:27:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633542866] [2022-12-12 23:27:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633542866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:46,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:46,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 23:27:46,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088419350] [2022-12-12 23:27:46,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 23:27:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 23:27:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 23:27:46,269 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:46,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 95 transitions, 1175 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:46,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:46,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:46,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:46,408 INFO L130 PetriNetUnfolder]: 426/657 cut-off events. [2022-12-12 23:27:46,409 INFO L131 PetriNetUnfolder]: For 618/618 co-relation queries the response was YES. [2022-12-12 23:27:46,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4624 conditions, 657 events. 426/657 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2236 event pairs, 29 based on Foata normal form. 50/553 useless extension candidates. Maximal degree in co-relation 4271. Up to 644 conditions per place. [2022-12-12 23:27:46,415 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 83 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2022-12-12 23:27:46,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 91 transitions, 1321 flow [2022-12-12 23:27:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 23:27:46,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 23:27:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2022-12-12 23:27:46,417 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-12 23:27:46,419 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2022-12-12 23:27:46,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 91 transitions, 1321 flow [2022-12-12 23:27:46,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 91 transitions, 1321 flow [2022-12-12 23:27:46,430 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 91 transitions, 1321 flow [2022-12-12 23:27:46,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:46,430 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:46,430 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:46,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 23:27:46,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:46,431 INFO L85 PathProgramCache]: Analyzing trace with hash -249635502, now seen corresponding path program 4 times [2022-12-12 23:27:46,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:46,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747057671] [2022-12-12 23:27:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:27:47,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:47,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747057671] [2022-12-12 23:27:47,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747057671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:47,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:47,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 23:27:47,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460477311] [2022-12-12 23:27:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 23:27:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 23:27:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:27:47,232 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-12 23:27:47,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 91 transitions, 1321 flow. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 23:27:47,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:47,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-12 23:27:47,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:47,553 INFO L130 PetriNetUnfolder]: 493/769 cut-off events. [2022-12-12 23:27:47,554 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2022-12-12 23:27:47,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6190 conditions, 769 events. 493/769 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2722 event pairs, 47 based on Foata normal form. 1/586 useless extension candidates. Maximal degree in co-relation 5713. Up to 756 conditions per place. [2022-12-12 23:27:47,561 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 106 selfloop transitions, 19 changer transitions 3/128 dead transitions. [2022-12-12 23:27:47,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 128 transitions, 2103 flow [2022-12-12 23:27:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 23:27:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 23:27:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2022-12-12 23:27:47,563 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2022-12-12 23:27:47,564 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2022-12-12 23:27:47,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 128 transitions, 2103 flow [2022-12-12 23:27:47,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 125 transitions, 2049 flow [2022-12-12 23:27:47,574 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 125 transitions, 2049 flow [2022-12-12 23:27:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 23:27:47,574 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:47,574 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 23:27:47,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1578734690, now seen corresponding path program 5 times [2022-12-12 23:27:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:47,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345807595] [2022-12-12 23:27:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:27:48,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:48,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345807595] [2022-12-12 23:27:48,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345807595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:48,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:48,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 23:27:48,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277212814] [2022-12-12 23:27:48,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:48,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 23:27:48,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 23:27:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:27:48,322 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-12 23:27:48,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 125 transitions, 2049 flow. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 23:27:48,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:48,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-12 23:27:48,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:48,721 INFO L130 PetriNetUnfolder]: 603/941 cut-off events. [2022-12-12 23:27:48,721 INFO L131 PetriNetUnfolder]: For 633/633 co-relation queries the response was YES. [2022-12-12 23:27:48,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8529 conditions, 941 events. 603/941 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3609 event pairs, 35 based on Foata normal form. 1/712 useless extension candidates. Maximal degree in co-relation 7847. Up to 928 conditions per place. [2022-12-12 23:27:48,733 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 119 selfloop transitions, 35 changer transitions 3/157 dead transitions. [2022-12-12 23:27:48,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 157 transitions, 2899 flow [2022-12-12 23:27:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 23:27:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 23:27:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2022-12-12 23:27:48,736 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2022-12-12 23:27:48,737 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2022-12-12 23:27:48,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 157 transitions, 2899 flow [2022-12-12 23:27:48,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 154 transitions, 2839 flow [2022-12-12 23:27:48,744 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 154 transitions, 2839 flow [2022-12-12 23:27:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 23:27:48,744 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:48,744 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:48,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-12 23:27:48,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1785576210, now seen corresponding path program 6 times [2022-12-12 23:27:48,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:48,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824687979] [2022-12-12 23:27:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:27:49,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:49,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824687979] [2022-12-12 23:27:49,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824687979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:49,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:27:49,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 23:27:49,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964404565] [2022-12-12 23:27:49,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:49,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 23:27:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 23:27:49,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:27:49,439 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-12 23:27:49,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 154 transitions, 2839 flow. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 23:27:49,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:49,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-12 23:27:49,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:49,783 INFO L130 PetriNetUnfolder]: 610/962 cut-off events. [2022-12-12 23:27:49,784 INFO L131 PetriNetUnfolder]: For 642/642 co-relation queries the response was YES. [2022-12-12 23:27:49,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9684 conditions, 962 events. 610/962 cut-off events. For 642/642 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3742 event pairs, 41 based on Foata normal form. 1/729 useless extension candidates. Maximal degree in co-relation 8928. Up to 949 conditions per place. [2022-12-12 23:27:49,792 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 156 selfloop transitions, 19 changer transitions 3/178 dead transitions. [2022-12-12 23:27:49,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 178 transitions, 3645 flow [2022-12-12 23:27:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 23:27:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 23:27:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2022-12-12 23:27:49,794 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29365079365079366 [2022-12-12 23:27:49,795 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2022-12-12 23:27:49,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 178 transitions, 3645 flow [2022-12-12 23:27:49,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 175 transitions, 3579 flow [2022-12-12 23:27:49,803 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 175 transitions, 3579 flow [2022-12-12 23:27:49,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 23:27:49,803 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:49,803 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:49,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-12 23:27:49,804 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash 345344036, now seen corresponding path program 1 times [2022-12-12 23:27:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:49,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349221416] [2022-12-12 23:27:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:27:49,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:49,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349221416] [2022-12-12 23:27:49,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349221416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:27:49,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143757310] [2022-12-12 23:27:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:49,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:49,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:49,956 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 23:27:49,957 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 23:27:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:27:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:27:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:27:50,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:27:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:27:50,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143757310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:27:50,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:27:50,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-12 23:27:50,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144603560] [2022-12-12 23:27:50,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:27:50,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:27:50,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:27:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:27:50,330 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:50,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 175 transitions, 3579 flow. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 23:27:50,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:50,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:50,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:50,700 INFO L130 PetriNetUnfolder]: 1081/1750 cut-off events. [2022-12-12 23:27:50,700 INFO L131 PetriNetUnfolder]: For 1648/1648 co-relation queries the response was YES. [2022-12-12 23:27:50,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19320 conditions, 1750 events. 1081/1750 cut-off events. For 1648/1648 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8204 event pairs, 58 based on Foata normal form. 44/1380 useless extension candidates. Maximal degree in co-relation 9805. Up to 1723 conditions per place. [2022-12-12 23:27:50,716 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 318 selfloop transitions, 7 changer transitions 13/340 dead transitions. [2022-12-12 23:27:50,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 340 transitions, 7651 flow [2022-12-12 23:27:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:27:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:27:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2022-12-12 23:27:50,718 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2022-12-12 23:27:50,719 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2022-12-12 23:27:50,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 340 transitions, 7651 flow [2022-12-12 23:27:50,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 327 transitions, 7359 flow [2022-12-12 23:27:50,737 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 327 transitions, 7359 flow [2022-12-12 23:27:50,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 23:27:50,737 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:50,738 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:50,745 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 23:27:50,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-12 23:27:50,944 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash 827992635, now seen corresponding path program 1 times [2022-12-12 23:27:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:50,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855214402] [2022-12-12 23:27:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:27:51,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855214402] [2022-12-12 23:27:51,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855214402] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:27:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752198933] [2022-12-12 23:27:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:51,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:51,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:51,182 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 23:27:51,185 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 23:27:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:51,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:27:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:27:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:27:51,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:27:51,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752198933] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:27:51,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:27:51,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-12-12 23:27:51,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835934729] [2022-12-12 23:27:51,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:27:51,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:27:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:27:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:27:51,370 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:51,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 327 transitions, 7359 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:51,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:51,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:51,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:51,775 INFO L130 PetriNetUnfolder]: 1274/2075 cut-off events. [2022-12-12 23:27:51,776 INFO L131 PetriNetUnfolder]: For 2202/2202 co-relation queries the response was YES. [2022-12-12 23:27:51,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24981 conditions, 2075 events. 1274/2075 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10047 event pairs, 62 based on Foata normal form. 34/1613 useless extension candidates. Maximal degree in co-relation 14309. Up to 2048 conditions per place. [2022-12-12 23:27:51,794 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 273 selfloop transitions, 75 changer transitions 28/378 dead transitions. [2022-12-12 23:27:51,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 378 transitions, 9272 flow [2022-12-12 23:27:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:27:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:27:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2022-12-12 23:27:51,795 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2022-12-12 23:27:51,796 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 49 predicate places. [2022-12-12 23:27:51,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 378 transitions, 9272 flow [2022-12-12 23:27:51,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 350 transitions, 8570 flow [2022-12-12 23:27:51,815 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 350 transitions, 8570 flow [2022-12-12 23:27:51,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:51,815 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:51,816 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:51,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 23:27:52,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-12 23:27:52,022 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:52,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1680822814, now seen corresponding path program 2 times [2022-12-12 23:27:52,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:52,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036298623] [2022-12-12 23:27:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:52,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:52,703 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 23:27:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:52,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036298623] [2022-12-12 23:27:52,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036298623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:27:52,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416680411] [2022-12-12 23:27:52,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:27:52,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:52,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:52,706 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 23:27:52,708 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 23:27:52,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:27:52,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:27:52,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-12 23:27:52,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:27:53,144 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 23:27:53,165 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 23:27:53,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:27:53,238 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-12 23:27:53,239 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 23:27:53,436 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 23:27:53,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416680411] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:27:53,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:27:53,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-12-12 23:27:53,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597823312] [2022-12-12 23:27:53,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:27:53,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:27:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:27:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-12-12 23:27:53,439 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:53,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 350 transitions, 8570 flow. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:53,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:53,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:53,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:55,402 INFO L130 PetriNetUnfolder]: 3300/5032 cut-off events. [2022-12-12 23:27:55,403 INFO L131 PetriNetUnfolder]: For 4205/4205 co-relation queries the response was YES. [2022-12-12 23:27:55,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65676 conditions, 5032 events. 3300/5032 cut-off events. For 4205/4205 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 26019 event pairs, 65 based on Foata normal form. 0/3856 useless extension candidates. Maximal degree in co-relation 38844. Up to 4991 conditions per place. [2022-12-12 23:27:55,450 INFO L137 encePairwiseOnDemand]: 18/28 looper letters, 807 selfloop transitions, 201 changer transitions 0/1010 dead transitions. [2022-12-12 23:27:55,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 1010 transitions, 26825 flow [2022-12-12 23:27:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 23:27:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 23:27:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 264 transitions. [2022-12-12 23:27:55,453 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-12-12 23:27:55,453 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 70 predicate places. [2022-12-12 23:27:55,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 1010 transitions, 26825 flow [2022-12-12 23:27:55,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 1010 transitions, 26825 flow [2022-12-12 23:27:55,507 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 1010 transitions, 26825 flow [2022-12-12 23:27:55,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:27:55,508 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:55,508 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:55,516 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 23:27:55,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:55,714 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:55,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:55,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1029657962, now seen corresponding path program 3 times [2022-12-12 23:27:55,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:55,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793836099] [2022-12-12 23:27:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:55,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:57,397 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 23:27:57,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:57,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793836099] [2022-12-12 23:27:57,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793836099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:27:57,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454480288] [2022-12-12 23:27:57,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:27:57,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:57,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:57,399 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 23:27:57,426 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 23:27:57,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:27:57,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:27:57,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-12 23:27:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:27:57,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:27:57,708 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 23:27:57,737 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 23:27:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:27:57,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:27:57,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:27:57,910 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 23:27:57,913 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 23:27:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:27:58,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454480288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:27:58,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:27:58,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 22 [2022-12-12 23:27:58,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552423965] [2022-12-12 23:27:58,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:27:58,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:27:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:27:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=448, Unknown=4, NotChecked=0, Total=506 [2022-12-12 23:27:58,027 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:27:58,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 1010 transitions, 26825 flow. Second operand has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 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 23:27:58,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:58,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:27:58,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:02,529 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~q2_front~0 4))) (and (= c_~q2~0.offset 0) (forall ((v_ArrVal_441 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_441) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) (< 0 (+ c_~q2~0.offset .cse0 1)) (<= c_~q2_front~0 0) (not (= (select (select |c_#memory_int| c_~q2~0.base) (+ c_~q2~0.offset .cse0)) 0)) (not (= |c_thread2Thread1of1ForFork2_~j~0#1| 0)))) is different from false [2022-12-12 23:28:04,993 INFO L130 PetriNetUnfolder]: 6684/10019 cut-off events. [2022-12-12 23:28:04,993 INFO L131 PetriNetUnfolder]: For 7086/7086 co-relation queries the response was YES. [2022-12-12 23:28:05,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140980 conditions, 10019 events. 6684/10019 cut-off events. For 7086/7086 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 57859 event pairs, 179 based on Foata normal form. 0/7978 useless extension candidates. Maximal degree in co-relation 72878. Up to 9964 conditions per place. [2022-12-12 23:28:05,093 INFO L137 encePairwiseOnDemand]: 8/28 looper letters, 1590 selfloop transitions, 350 changer transitions 1/1943 dead transitions. [2022-12-12 23:28:05,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 1943 transitions, 55532 flow [2022-12-12 23:28:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 23:28:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 23:28:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 351 transitions. [2022-12-12 23:28:05,095 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36869747899159666 [2022-12-12 23:28:05,096 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2022-12-12 23:28:05,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 1943 transitions, 55532 flow [2022-12-12 23:28:05,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 1942 transitions, 55504 flow [2022-12-12 23:28:05,289 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 1942 transitions, 55504 flow [2022-12-12 23:28:05,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 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 23:28:05,290 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:28:05,290 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:28:05,300 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 23:28:05,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:05,496 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:28:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:28:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1528917120, now seen corresponding path program 4 times [2022-12-12 23:28:05,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:28:05,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24627667] [2022-12-12 23:28:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:05,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:28:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:06,436 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 23:28:06,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:28:06,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24627667] [2022-12-12 23:28:06,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24627667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:28:06,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501561787] [2022-12-12 23:28:06,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:28:06,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:06,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:28:06,438 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 23:28:06,440 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 23:28:06,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:28:06,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:28:06,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 23:28:06,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:28:06,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:28:06,680 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 23:28:06,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:28:06,715 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 23:28:06,748 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 23:28:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:28:06,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:28:06,800 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_499) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2022-12-12 23:28:06,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:06,854 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 85 treesize of output 81 [2022-12-12 23:28:06,858 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 64 treesize of output 58 [2022-12-12 23:28:06,867 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 58 treesize of output 46 [2022-12-12 23:28:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:28:06,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501561787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:28:06,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:28:06,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 22 [2022-12-12 23:28:06,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204989700] [2022-12-12 23:28:06,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:28:06,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:28:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:28:06,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:28:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2022-12-12 23:28:06,979 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:28:06,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 1942 transitions, 55504 flow. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 23:28:06,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:28:06,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:28:06,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:11,522 INFO L130 PetriNetUnfolder]: 6861/10307 cut-off events. [2022-12-12 23:28:11,523 INFO L131 PetriNetUnfolder]: For 10180/10180 co-relation queries the response was YES. [2022-12-12 23:28:11,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155153 conditions, 10307 events. 6861/10307 cut-off events. For 10180/10180 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 59570 event pairs, 178 based on Foata normal form. 0/8299 useless extension candidates. Maximal degree in co-relation 77860. Up to 10238 conditions per place. [2022-12-12 23:28:11,725 INFO L137 encePairwiseOnDemand]: 19/28 looper letters, 1879 selfloop transitions, 245 changer transitions 0/2126 dead transitions. [2022-12-12 23:28:11,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 2126 transitions, 65012 flow [2022-12-12 23:28:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 23:28:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 23:28:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 138 transitions. [2022-12-12 23:28:11,727 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2022-12-12 23:28:11,727 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 117 predicate places. [2022-12-12 23:28:11,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 2126 transitions, 65012 flow [2022-12-12 23:28:11,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 2126 transitions, 65012 flow [2022-12-12 23:28:11,834 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 2126 transitions, 65012 flow [2022-12-12 23:28:11,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 23:28:11,835 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:28:11,835 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:28:11,846 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 23:28:12,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 23:28:12,046 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:28:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:28:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1264578437, now seen corresponding path program 1 times [2022-12-12 23:28:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:28:12,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758460481] [2022-12-12 23:28:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:28:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:28:12,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:28:12,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758460481] [2022-12-12 23:28:12,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758460481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:28:12,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213640137] [2022-12-12 23:28:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:12,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:28:12,169 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 23:28:12,171 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 23:28:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:12,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:28:12,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:28:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:28:12,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:28:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:28:12,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213640137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:28:12,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:28:12,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 23:28:12,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481608258] [2022-12-12 23:28:12,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:28:12,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:28:12,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:28:12,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:28:12,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:28:12,412 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:28:12,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 2126 transitions, 65012 flow. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:28:12,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:28:12,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:28:12,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:17,495 INFO L130 PetriNetUnfolder]: 7803/12049 cut-off events. [2022-12-12 23:28:17,495 INFO L131 PetriNetUnfolder]: For 14519/14519 co-relation queries the response was YES. [2022-12-12 23:28:17,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193356 conditions, 12049 events. 7803/12049 cut-off events. For 14519/14519 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 75115 event pairs, 249 based on Foata normal form. 394/10171 useless extension candidates. Maximal degree in co-relation 58018. Up to 11966 conditions per place. [2022-12-12 23:28:17,554 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 1274 selfloop transitions, 9 changer transitions 1458/2743 dead transitions. [2022-12-12 23:28:17,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 2743 transitions, 89394 flow [2022-12-12 23:28:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:28:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:28:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2022-12-12 23:28:17,555 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2022-12-12 23:28:17,555 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 122 predicate places. [2022-12-12 23:28:17,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 2743 transitions, 89394 flow [2022-12-12 23:28:17,613 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 1285 transitions, 41829 flow [2022-12-12 23:28:17,614 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 1285 transitions, 41829 flow [2022-12-12 23:28:17,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:28:17,614 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:28:17,614 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:28:17,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 23:28:17,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 23:28:17,820 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:28:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:28:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1697393499, now seen corresponding path program 2 times [2022-12-12 23:28:17,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:28:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245887544] [2022-12-12 23:28:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:17,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:28:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:28:17,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:28:17,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245887544] [2022-12-12 23:28:17,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245887544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:28:17,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784886594] [2022-12-12 23:28:17,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:28:17,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:17,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:28:17,946 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 23:28:17,949 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 23:28:18,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:28:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:28:18,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:28:18,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:28:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:28:18,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:28:18,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784886594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:28:18,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:28:18,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-12 23:28:18,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718175656] [2022-12-12 23:28:18,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:28:18,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:28:18,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:28:18,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:28:18,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:28:18,251 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:28:18,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 1285 transitions, 41829 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:28:18,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:28:18,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:28:18,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:20,552 INFO L130 PetriNetUnfolder]: 4677/7149 cut-off events. [2022-12-12 23:28:20,552 INFO L131 PetriNetUnfolder]: For 8525/8525 co-relation queries the response was YES. [2022-12-12 23:28:20,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121854 conditions, 7149 events. 4677/7149 cut-off events. For 8525/8525 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 39116 event pairs, 83 based on Foata normal form. 217/5756 useless extension candidates. Maximal degree in co-relation 78427. Up to 7108 conditions per place. [2022-12-12 23:28:20,616 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 1036 selfloop transitions, 130 changer transitions 293/1461 dead transitions. [2022-12-12 23:28:20,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 1461 transitions, 50490 flow [2022-12-12 23:28:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:28:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:28:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2022-12-12 23:28:20,617 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.625 [2022-12-12 23:28:20,617 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 101 predicate places. [2022-12-12 23:28:20,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 1461 transitions, 50490 flow [2022-12-12 23:28:20,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 1168 transitions, 40309 flow [2022-12-12 23:28:20,673 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 1168 transitions, 40309 flow [2022-12-12 23:28:20,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:28:20,673 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:28:20,673 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:28:20,679 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 23:28:20,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:20,874 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:28:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:28:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash 93375425, now seen corresponding path program 1 times [2022-12-12 23:28:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:28:20,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898121681] [2022-12-12 23:28:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:20,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:28:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:28:21,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:28:21,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898121681] [2022-12-12 23:28:21,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898121681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:28:21,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166771207] [2022-12-12 23:28:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:21,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:21,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:28:21,414 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 23:28:21,417 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 23:28:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 23:28:21,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:28:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:28:21,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:28:21,921 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-12 23:28:21,921 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 24 treesize of output 15 [2022-12-12 23:28:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:28:22,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166771207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:28:22,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:28:22,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-12-12 23:28:22,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631050899] [2022-12-12 23:28:22,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:28:22,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 23:28:22,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:28:22,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 23:28:22,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-12-12 23:28:22,174 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-12 23:28:22,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 1168 transitions, 40309 flow. Second operand has 26 states, 26 states have (on average 2.8076923076923075) 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 23:28:22,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:28:22,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-12 23:28:22,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:29,485 INFO L130 PetriNetUnfolder]: 14706/22028 cut-off events. [2022-12-12 23:28:29,485 INFO L131 PetriNetUnfolder]: For 12861/12861 co-relation queries the response was YES. [2022-12-12 23:28:29,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398303 conditions, 22028 events. 14706/22028 cut-off events. For 12861/12861 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 139880 event pairs, 439 based on Foata normal form. 0/17060 useless extension candidates. Maximal degree in co-relation 168044. Up to 21973 conditions per place. [2022-12-12 23:28:29,806 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 3744 selfloop transitions, 755 changer transitions 9/4508 dead transitions. [2022-12-12 23:28:29,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 4508 transitions, 164805 flow [2022-12-12 23:28:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 23:28:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 23:28:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 227 transitions. [2022-12-12 23:28:29,807 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3685064935064935 [2022-12-12 23:28:29,808 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 106 predicate places. [2022-12-12 23:28:29,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 4508 transitions, 164805 flow [2022-12-12 23:28:30,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 4499 transitions, 164481 flow [2022-12-12 23:28:30,020 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 4499 transitions, 164481 flow [2022-12-12 23:28:30,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) 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 23:28:30,020 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:28:30,020 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:28:30,028 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 23:28:30,220 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,SelfDestructingSolverStorable16 [2022-12-12 23:28:30,221 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:28:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:28:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2073593005, now seen corresponding path program 2 times [2022-12-12 23:28:30,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:28:30,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591375070] [2022-12-12 23:28:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:30,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:28:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:28:30,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:28:30,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591375070] [2022-12-12 23:28:30,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591375070] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:28:30,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926860208] [2022-12-12 23:28:30,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:28:30,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:30,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:28:30,781 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 23:28:30,783 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 23:28:30,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:28:30,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:28:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 23:28:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:28:31,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:28:31,227 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 20 treesize of output 22 [2022-12-12 23:28:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:28:31,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:28:31,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:31,475 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 44 treesize of output 40 [2022-12-12 23:28:31,478 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 23:28:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:28:31,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926860208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:28:31,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:28:31,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-12 23:28:31,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187090663] [2022-12-12 23:28:31,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:28:31,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 23:28:31,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:28:31,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 23:28:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-12-12 23:28:31,750 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:28:31,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 4499 transitions, 164481 flow. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 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 23:28:31,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:28:31,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:28:31,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:29:10,983 INFO L130 PetriNetUnfolder]: 27750/41720 cut-off events. [2022-12-12 23:29:10,983 INFO L131 PetriNetUnfolder]: For 23268/23268 co-relation queries the response was YES. [2022-12-12 23:29:11,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796240 conditions, 41720 events. 27750/41720 cut-off events. For 23268/23268 co-relation queries the response was YES. Maximal size of possible extension queue 1382. Compared 287767 event pairs, 552 based on Foata normal form. 0/32483 useless extension candidates. Maximal degree in co-relation 327162. Up to 41637 conditions per place. [2022-12-12 23:29:11,360 INFO L137 encePairwiseOnDemand]: 18/28 looper letters, 7634 selfloop transitions, 1484 changer transitions 15/9137 dead transitions. [2022-12-12 23:29:11,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 9137 transitions, 352424 flow [2022-12-12 23:29:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 23:29:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 23:29:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 286 transitions. [2022-12-12 23:29:11,365 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2022-12-12 23:29:11,366 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 131 predicate places. [2022-12-12 23:29:11,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 9137 transitions, 352424 flow [2022-12-12 23:29:11,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 9122 transitions, 351854 flow [2022-12-12 23:29:11,790 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 9122 transitions, 351854 flow [2022-12-12 23:29:11,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 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 23:29:11,790 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:29:11,790 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:29:11,798 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 23:29:11,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 23:29:11,996 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:29:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:29:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash 625177825, now seen corresponding path program 3 times [2022-12-12 23:29:11,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:29:11,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741220894] [2022-12-12 23:29:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:29:11,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:29:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:29:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:29:12,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:29:12,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741220894] [2022-12-12 23:29:12,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741220894] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:29:12,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020009419] [2022-12-12 23:29:12,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:29:12,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:29:12,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:29:12,784 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 23:29:12,818 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 23:29:13,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:29:13,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:29:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 23:29:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:29:13,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:29:13,224 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 23:29:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:29:13,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:29:13,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:29:13,392 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 44 treesize of output 40 [2022-12-12 23:29:13,395 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 23:29:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:29:13,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020009419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:29:13,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:29:13,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-12 23:29:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505239492] [2022-12-12 23:29:13,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:29:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 23:29:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:29:13,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 23:29:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=552, Unknown=1, NotChecked=0, Total=650 [2022-12-12 23:29:13,662 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 23:29:13,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 9122 transitions, 351854 flow. Second operand has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 23:29:13,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:29:13,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 23:29:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:29:20,903 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~q2_front~0 4))) (and (or (< c_~q2_back~0 0) (and (< |c_#StackHeapBarrier| (+ |c_ULTIMATE.start_main_~#t3~0#1.base| 1)) (= (* c_~q2_back~0 4) .cse0)) (< 0 c_~q2_back~0)) (forall ((v_ArrVal_789 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_789) c_~q2~0.base) (+ c_~q2~0.offset .cse0)) 0))))) is different from false [2022-12-12 23:31:55,001 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~q2_front~0 4))) (let ((.cse0 (< c_~q2_back~0 0)) (.cse1 (= (* c_~q2_back~0 4) .cse2))) (and (or .cse0 (and (< |c_#StackHeapBarrier| (+ |c_ULTIMATE.start_main_~#t3~0#1.base| 1)) .cse1) (< 0 c_~q2_back~0)) (forall ((v_ArrVal_789 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_789) c_~q2~0.base) (+ c_~q2~0.offset .cse2)) 0))) (or .cse0 (< c_~n2~0 (+ c_~q2_back~0 2)) (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (and (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t3~0#1.base|) .cse1))))) is different from false [2022-12-12 23:32:23,622 INFO L130 PetriNetUnfolder]: 49871/75142 cut-off events. [2022-12-12 23:32:23,622 INFO L131 PetriNetUnfolder]: For 30853/30853 co-relation queries the response was YES. [2022-12-12 23:32:23,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509412 conditions, 75142 events. 49871/75142 cut-off events. For 30853/30853 co-relation queries the response was YES. Maximal size of possible extension queue 2265. Compared 552390 event pairs, 652 based on Foata normal form. 0/58242 useless extension candidates. Maximal degree in co-relation 606716. Up to 75059 conditions per place. [2022-12-12 23:32:24,307 INFO L137 encePairwiseOnDemand]: 8/28 looper letters, 14374 selfloop transitions, 2730 changer transitions 0/17108 dead transitions. [2022-12-12 23:32:24,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 17108 transitions, 693811 flow [2022-12-12 23:32:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 23:32:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 23:32:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 310 transitions. [2022-12-12 23:32:24,309 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3817733990147783 [2022-12-12 23:32:24,309 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 156 predicate places. [2022-12-12 23:32:24,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 17108 transitions, 693811 flow [2022-12-12 23:32:25,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 17108 transitions, 693811 flow [2022-12-12 23:32:25,113 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 17108 transitions, 693811 flow [2022-12-12 23:32:25,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 23:32:25,113 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:32:25,113 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:32:25,118 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 23:32:25,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:32:25,314 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:32:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:32:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2058328085, now seen corresponding path program 4 times [2022-12-12 23:32:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:32:25,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502521773] [2022-12-12 23:32:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:32:25,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:32:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:32:27,669 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 23:32:27,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:32:27,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502521773] [2022-12-12 23:32:27,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502521773] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:32:27,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531528848] [2022-12-12 23:32:27,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:32:27,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:32:27,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:32:27,676 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 23:32:27,676 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 23:32:27,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:32:27,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:32:27,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 23:32:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:32:27,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:32:27,862 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-12 23:32:27,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-12 23:32:27,970 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 23:32:27,971 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 11 treesize of output 11 [2022-12-12 23:32:28,399 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-12 23:32:28,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 47 [2022-12-12 23:32:28,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:32:28,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-12-12 23:32:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:32:28,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:32:28,484 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_858) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))) 0))) is different from false [2022-12-12 23:32:28,801 INFO L321 Elim1Store]: treesize reduction 31, result has 81.0 percent of original size [2022-12-12 23:32:28,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 168 [2022-12-12 23:32:28,812 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 23:32:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:32:29,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531528848] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:32:29,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:32:29,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 11] total 38 [2022-12-12 23:32:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144225910] [2022-12-12 23:32:29,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:32:29,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-12 23:32:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:32:29,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-12 23:32:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=4, NotChecked=72, Total=1482 [2022-12-12 23:32:29,402 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-12 23:32:29,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 17108 transitions, 693811 flow. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 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 23:32:29,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:32:29,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-12 23:32:29,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 23:41:06,656 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 23:41:06,697 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:41:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-12 23:41:06,842 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 23:41:06,850 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 23:41:07,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:41:07,052 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 0/28 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 2056637 conditions, 97551 events (66783/97550 cut-off events. For 46525/46525 co-relation queries the response was YES. Maximal size of possible extension queue 3287. Compared 729373 event pairs, 1051 based on Foata normal form. 12/77145 useless extension candidates. Maximal degree in co-relation 605264. Up to 97411 conditions per place.). [2022-12-12 23:41:07,054 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 23:41:07,054 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 23:41:07,054 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 23:41:07,055 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 4, 2, 1, 1, 1, 1] [2022-12-12 23:41:07,058 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:41:07,058 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:41:07,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:41:07 BasicIcfg [2022-12-12 23:41:07,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:41:07,061 INFO L158 Benchmark]: Toolchain (without parser) took 813330.10ms. Allocated memory was 191.9MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 150.6MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2022-12-12 23:41:07,061 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 191.9MB. Free memory is still 167.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:41:07,061 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.20ms. Allocated memory is still 191.9MB. Free memory was 150.6MB in the beginning and 136.9MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-12 23:41:07,061 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.99ms. Allocated memory is still 191.9MB. Free memory was 136.9MB in the beginning and 134.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:41:07,062 INFO L158 Benchmark]: Boogie Preprocessor took 34.85ms. Allocated memory is still 191.9MB. Free memory was 134.3MB in the beginning and 132.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:41:07,062 INFO L158 Benchmark]: RCFGBuilder took 718.88ms. Allocated memory is still 191.9MB. Free memory was 132.7MB in the beginning and 98.7MB in the end (delta: 34.1MB). Peak memory consumption was 33.6MB. Max. memory is 8.0GB. [2022-12-12 23:41:07,062 INFO L158 Benchmark]: TraceAbstraction took 812183.72ms. Allocated memory was 191.9MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 97.6MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.1GB. Max. memory is 8.0GB. [2022-12-12 23:41:07,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 191.9MB. Free memory is still 167.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 319.20ms. Allocated memory is still 191.9MB. Free memory was 150.6MB in the beginning and 136.9MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 65.99ms. Allocated memory is still 191.9MB. Free memory was 136.9MB in the beginning and 134.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.85ms. Allocated memory is still 191.9MB. Free memory was 134.3MB in the beginning and 132.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 718.88ms. Allocated memory is still 191.9MB. Free memory was 132.7MB in the beginning and 98.7MB in the end (delta: 34.1MB). Peak memory consumption was 33.6MB. Max. memory is 8.0GB. * TraceAbstraction took 812183.72ms. Allocated memory was 191.9MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 97.6MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.0s, 185 PlacesBefore, 32 PlacesAfterwards, 193 TransitionsBefore, 28 TransitionsAfterwards, 1880 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 118 TrivialYvCompositions, 35 ConcurrentYvCompositions, 11 ChoiceCompositions, 164 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1151, independent: 1132, independent conditional: 1132, independent unconditional: 0, dependent: 19, dependent conditional: 19, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1151, independent: 1132, independent conditional: 0, independent unconditional: 1132, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1151, independent: 1132, independent conditional: 0, independent unconditional: 1132, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1151, independent: 1132, independent conditional: 0, independent unconditional: 1132, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1016, independent: 1003, independent conditional: 0, independent unconditional: 1003, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1016, independent: 993, independent conditional: 0, independent unconditional: 993, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 23, independent: 10, independent conditional: 0, independent unconditional: 10, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 135, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 65, dependent conditional: 0, dependent unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1151, independent: 129, independent conditional: 0, independent unconditional: 129, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 1016, unknown conditional: 0, unknown unconditional: 1016] , Statistics on independence cache: Total cache size (in pairs): 1692, Positive cache size: 1679, Positive conditional cache size: 0, Positive unconditional cache size: 1679, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 135]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 0/28 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 2056637 conditions, 97551 events (66783/97550 cut-off events. For 46525/46525 co-relation queries the response was YES. Maximal size of possible extension queue 3287. Compared 729373 event pairs, 1051 based on Foata normal form. 12/77145 useless extension candidates. Maximal degree in co-relation 605264. Up to 97411 conditions per place.). - TimeoutResultAtElement [Line: 127]: 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 (39states, 0/28 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 2056637 conditions, 97551 events (66783/97550 cut-off events. For 46525/46525 co-relation queries the response was YES. Maximal size of possible extension queue 3287. Compared 729373 event pairs, 1051 based on Foata normal form. 12/77145 useless extension candidates. Maximal degree in co-relation 605264. Up to 97411 conditions per place.). - TimeoutResultAtElement [Line: 129]: 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 (39states, 0/28 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 2056637 conditions, 97551 events (66783/97550 cut-off events. For 46525/46525 co-relation queries the response was YES. Maximal size of possible extension queue 3287. Compared 729373 event pairs, 1051 based on Foata normal form. 12/77145 useless extension candidates. Maximal degree in co-relation 605264. Up to 97411 conditions per place.). - TimeoutResultAtElement [Line: 128]: 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 (39states, 0/28 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 2056637 conditions, 97551 events (66783/97550 cut-off events. For 46525/46525 co-relation queries the response was YES. Maximal size of possible extension queue 3287. Compared 729373 event pairs, 1051 based on Foata normal form. 12/77145 useless extension candidates. Maximal degree in co-relation 605264. Up to 97411 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 225 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 2.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 812.1s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 779.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.2s, HoareTripleCheckerStatistics: 136 mSolverCounterUnknown, 2750 SdHoareTripleChecker+Valid, 10.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2750 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 670 IncrementalHoareTripleChecker+Unchecked, 55 mSDsCounter, 570 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12764 IncrementalHoareTripleChecker+Invalid, 14140 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 570 mSolverCounterUnsat, 7 mSDtfsCounter, 12764 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 826 GetRequests, 429 SyntacticMatches, 8 SemanticMatches, 389 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 3446 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=693811occurred in iteration=19, InterpolantAutomatonStates: 220, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 19 MinimizatonAttempts, 60089 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 16.3s InterpolantComputationTime, 806 NumberOfCodeBlocks, 806 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1012 ConstructedInterpolants, 22 QuantifiedInterpolants, 18825 SizeOfPredicates, 133 NumberOfNonLiveVariables, 3821 ConjunctsInSsa, 249 ConjunctsInUnsatCore, 40 InterpolantComputations, 11 PerfectInterpolantSequences, 102/214 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